@@RobDahm thought the same thing, the car kicks dust like a current generation f1 cars But something isn't quite right but I'm sure you will figure it out
Wind tunnel is the only answer at this point I think. (at least once all the body/aero is on the car as it's final form is going to be... This iteration's at least anyway 😜)
My non-engineered youtube science says most of the dust kick-up is just the rear diffuser. Doing exactly what it should; what is missing is the rest of the ground aero. WIth how important aerodynamics are, this should be the focus for Rob. Making sure all those holes inside get covered so the air is going over and under. Right now I imagine the inside is just causing so much drag. Wheels need more aero to remove dirty air as well. With a focus on aero and then tuning the car, it would be easier to deal with. Tuning a car now seems like learning how to tune a parachute full of air. ~I made this comment before the ending of the vid where Rob even mentions aero. Love all your videos Rob, been watching very early on. Happy you are sharing this journey with the rest of us.
I bet it breaks after 10 runs... all cars like this are junk... just people trying to be "fast" I bet a stock tesla plaid would beat that pos and never break that running 10 times is guaranteed to break
"We went to 60 pounds of boost" is one hell of a way to end on a cliffhanger! lmao Congrats to you and your team on coming so far! You're such an unintentional motivational speaker and every time I see your vids I want to go work on my project lol
Watching the 4 rotor take that Ferrari in the top end once it's caught traction and hitting full boost really shows how fast that thing is. Would love to see what this thing can do on a prepped surface!
Not only that, but Rob said that he only was in the high 20s psi range for boost and it can go up into the 40's... the thing is gonna be a Dorito missel.
NO SHIT! Put some tires on the damn thing! Spinning tires, loud revs... doesnt really do anything! If its going to be a drag car.. or at least try.. gotta do it right!
such a pleasure to see this car running. i've been following you since the birth of the idea and i never believed you would really make it. but here i am looking like a fool for doubting you. so happy for you that you made that dream come true! truely something only a few people are able to achieve!
@shrerd1894; clearly You lack the proper basics about electrical, digital signals, wiring, etc. A. The variations, spikes with the digital speed sensor are clearly clean, stable until much higher speeds -> thus clearly NOT an issue with any interference ! B. Thus, clearly, obviously, certain the issue is intermittent connection at higher speeds, RPM 1. The first area to check are the connections, connectors from the wires of the sensor(s), which are vulnerable to the vibrations, due to higher RPM and wind speeds,. 2. The next is to verify the wires inside the sensor and sensor itself - this should have shown up with proper high speed testing on the dynometer, but perhaps they did not operate the vehicle at these higher RPM speeds 3. Also the actual higher speed driving, especially on this aircraft runway, has additional variations, vibrations, along with the high speed air flow during very high speed travel as this 4. For these reasons, basis, poper planning, connectors, connections, wiring, sensors must be proper, carefully selected, chosen, wired, installed as those within aircraft, high speed vehicles as F1, Indy, NASCAR, NHRA/IHRA/PDRA, others 5. typical "Trial & Error" process among the amateurs, novice, platform-video producers, including many which modify, build performance level vehicles, many for drag, track, other racing but not trained properly,lack the proper knowledge, especially within safety are extremely common and should be clear, obvious to humans with proper basic thinking as examples of "what NOT to do"-"NOT follow", don't do as they do with their mistakes, errors, claims etc. All The Best
The way the 4 rotor just lunges past supercars in the high 100's is something I've never seen before! We all know Rob and the team have built something special, but I think we've only seen the beginning of what it's capable of!
There was something very wholesome about this video. Really enjoyed it, especially the 1st half covering the road trip and early stages of the event. I wonder if not having the rear window in place is messing up the air around the wing. Is there a reason the rear window is missing? With this much power some time in a wind tunnel might not be a bad idea. Love your videos Rob. It’s been a real pleasure watching your journey unfold.
Literally about to go to bed and instant reaction when the notification drops “aight. Guess I’m not sleeping just yet.” *clicks video* Edit: bruh that wiggle is scary from my PHONE. Well done on getting the record too!!
There is something satisfying in watching your journey with these cars. Like, you actually put the work in yourself on the cars. You often break something on the cars when trying them out, but you're always immediately back to the drawing board to see how you can make it work and get better. It's satisfying when it works out for you. Definitely a good example of a person with determination and good mental attitude. We need more wholesome type of people like you in the car scene.
A milestone for sure. You are a huge inspiration, Rob! Im attempting to follow in your footsteps in my own way. I dont think most people realize how hard it is to do what you are doing, and the sacrifice it requires.
I love how focused you are Rob after the pull against the farrier @12:18 and your talking about the wobble you don't even realize that you've broken your own record🤣 love it man car is absolutely sick and you're doing awesome things
I’ve been watching for awhile now. I’m a Porsche fan but had a friend that had one of those 3 rotors with a turbo. Loved riding around in it. What you’re doing is awesome and your videos are addictive. Love watching you tweak these absolute dragons!🐉
You have created a machine of LEGENDARY status Rob. I'm so glad I got to watch the entire progression. What a wild ride of RUclips viewership. Thank you bro.
Imagine showing up in a stupid expensive Ferrari just to get beat by some lunatic with a few Doritos as an engine. 11:09 AND HE REDUCED POWER AND STILL WON.
The first run I was watching the speedo jump all over, it had me so confused. I never would have expected watching your first rx7 video back in the day that things would end up here. Awesome job Rahb! 😂
So true, I remember how he talked in a negative Light about the rotary car in his first video. Most rotary owners go through this and also went through it also and now I am a rotard. A rotard is someone who does not give up on the rotary motor but instead educates himself on how to properly care for it. Rob is a rotard and making great videos for us other rotards. Brap on
8:01 you can see on the speedometer showing random speed, that wheel sensor doing weird things when you let off throtle at the end of the 1st pass. Same on the 2nd one. Great Vid. Peace
Hi Rob, my son and I have enjoyed watching your journey here in New Zealand. I have particularly enjoyed the complexity of the build. I believe while watching your runs, you have an air separation problem. Your cabin is open at the bottom and top. We will be interested in your verdict. Keep the rubber on the ground.
Nice work Rob. For safety purpose, I would definetly check to see why the car gets upset at high speed. There is no doubt that you will make the 200 club. Brap on Rob
1:42 crazy that I knew exactly where you guys were based on that stretch of road between the carved out hills, I've driven through there dozens of times to and from San Antonio! Most pretty part of Texas, IMO.
Keep up the great work, Rob and team. I am proud of all the work you have done and the positive energy you bring to the rotory/car community. I am living vicariously through you as my FD has been put on hold for a long time now. One day I'll join you on the road.
If Rob dropped a 4 hour video about the ECU magic he's doing and other random info about the car I would watch it all and still want more cause this car is so awesome.
The lack of anti-roll bars might be part of why you're having so many problems with high-speed stability. Adam LZ had the same issue with his Barra-swapped GT350.
No doubt. Had a sway bar beat the new bushings out on a turbo vehicle I own and top speed it would rock side to side. To the point it seemed one minor movement of the steering wheel the car would lose control.
@@x808drifter Still need anti-roll bars of some sort. The mechanics of the instability don't change, just the motion ratios on the suspension components themselves. Without something to suppress the roll, it'll just continue oscillating and only worsen as speed rises.
In the end, when Dahm said "We hit 60 pounds of boost". My jaw dropped and I got all hyped for the next video. Bro I can wait to see the numbers, and here that beautiful car sing.
Rob is such a good sport. Im glad to see his success with this car and im a rotary enthisiast myself. I had a beefed Rx2 when i was 17 and a stock RX7 some yrs later.
I am so glad to see you come so far rob, i cannot imagine it. Seeing you be so dedicated and passionate to improve and get the rx better is outstanding. It is really good to see you make such videos and maybe one day i would meet you at a car meet or an event. Keep making great videos and i wish you prosperity and well being. Much love :)
Well done Rob and team. Although I'm not surprised, you guys have put in a mountain of work and RnD. Massive congrats and guh damn that thing sounds nice!
I was there to see your three rotor half mile run which seems like forever ago now but this car is in a totally different League, I wish I was there to watch a few runs with the 4 rotor because it's definitely a once-in-a-lifetime experience if you live where I live you're never going to see stuff like this unless you go looking for it far away and other states lol
the vibe of these videos & the acom[lishments yall have been consistently putting out is 10/10 my dudes. also, Isiah is heady af. He is like the fab god equivalent of a master glass blower. I know yall jokingly fry him for his drip, but he dead ass reminds me of multiple cool ass guys I know with over $300k in their glass, EACH. He'd fit right in at the glass shows i've been too & everyone would be stoked on his Tig work too.
i was terrified of the trans being open but honestly seeing the 4 on the track racing has been such an amazing feeling. Congrats rob your dream is so close to beeing 100% complete but we all know that 100% never feel enough so we look for another .001% we could squeeze out ahaha much love rob
Awesome video. I'd get a rear window in and see what effect that has. You ever had a car that makes that throbbing sound when you open the rear windows? Plus the air going over the top of the car and hitting the spoiler might be getting disturbed. Aero tunnel would be really interesting
For towing buy a couple sets of "axle tie down straps". You can wrap them around the tires (or axle) pretty easy without damage to wheels or straps. Minimum of 24" length. If you want the ultimate no hassle strap search "strapinno" retractable ratchet straps with the snap hook option. It will cut your strap setup time by 80%. No more rats nest of straps when not in use or in transit.
Rob do you think the exhaust venting out the side affects your aerodynamics at high speed? See if there is someone out there that can do CFD on it to keep you safe bro. Good stuff on all the accomplishments. 👍
Weird, I don't think it would be an aerodynamic problem considering its only one side of the car doing the wobble. Your car is pretty much mirrored underneath I would imagine, so I would try fixing the sensor problems first. Kind of reminds me of the F1 porpoising problem they had for a while. Downforce increases to a point where it stalls out, then goes back up and repeats.
Man, I had an '06 Hawkeye STI that would speed wobble on decel that was absolutely terrifying. Watching the onboard camera angle instantly brought back some "OH SHIT!" memories. It's unsettling to say the least. Mine was caused by the rear passenger side wheel bearing being shot and having a bunch of rolling resistance on it. The wheel bearing didn't have any wobble or play in it, it just didn't roll well. It took forever to figure that out.
Seen a thing on jack staps the other day I never thought about but you need to make sure there are a couple wraps around the cylinder before it starts tightening. This makes sure you get friction and hold the strap tight.
Congratz on the new PB/record! I'm wondering if you have a traction control issue due to front/rear tire diameter expansion variations at high speeds. Can you see the mph speed of the front axles vs. rear axles in the logs? Are you running 555R's on front and rears or slicks? I'm sure you'll fix all the issues. Looking forward to your next videos
Two theoretical things here, would having a rear window in place help clean up the air? Also, I wonder if a carbon shark fin, similar to what you'd find on the AMG One, or the Jesko, help keep the car straight at high speeds. Would be cool to see one integrated into the rear window, should you go plexiglass (with F40 style vents 😊).
Clearly KC, You know nothing about "Theory", proper principles, ideas, concepts, though You did clearly properly figure the issue is with speed, though clearly lack the proper basics with aerodynamics, electrical and the effects of the variations, varying speed sensor voltage to the ECU which affects the vehicle operation including driving stability, as Rob directly stated [at least he knows it does affect this, since he arranged the ECU to use this information within its controls] Good Luck, All The Best, Sincerely
@@kc550 KC, Clearly You lack with what is a 'story' as You do with "Theory", principles, physics, science, mathematics, logic, reason and 'common sense', which is no longer common and extremely rare ! Thankfully amwell trained, developed with these and my given abilities, capabilities, attributes, aspects, talents over my lifetime [63 + years] and continuing with improvement, development, expertise, design, etc. Good Luck
Clearly You lack the obvious, clear issue with intermittent, quickly varying voltage as seen in the ECU data and on the speedometer !! The issue is clearly NOT limits with the speed sensor, else it would have reached its upper voltage limit and either remained [as would be expected] or alternatively with a poor design dropped to zero !! Another individual with simple lacking of the basics with electricity, electrical voltage, sensor outputs, ECU data. Goo Luck, All The Best, Sincerely
@@newtonfirefly3584 Perhaps instead of being condescending, try being constructive. And instead of putting people down try engaging in a discussion. If we apply some logic to the situation it is apparent that all 4 wheel speed sensors are reading all over the place. That tells me it is unlikely to be a single sensor that is bad and even less likely for it to be a wiring issue such as chaffed wires. Now as far as my understanding goes the wheel speed sensors are putting out pulses which are read by the ECU. Those pulses could be coming fast enough that capacitance in the wiring attenuates the pulses enough that the ECU has trouble accurately reading them. Or it could be that the sensors are not capable of reading a trigger wheel going that fast. Seeing as I do not have the model number of the wheel speed sensors, and I don't have the time to look for it in the videos, I will elect to just speculate.
@@ryanhebron4287 Ryan Hebron, clearly You have trouble differentiating between criticism, conveying proper information and condescending. My comments are directed to those like You to be aware of the nonsense Rob Dahm presents, does and proceeds with including the disregard for his own safety, life and those around him that he affects along with those that are easily influenced. Already have attempted many comments directed specifically to Rob Dahm, including with specific suggestions as contacting FuelTech, Anderson Dick, Luis and their dedicated rotary expert, but he continues to proceed within his mindset, arrogance, etc., refusing to make any effort. In addition, Your ideas about what You describe as "pulses" clearly indicates Your basic lacking with electrical voltages, voltage variations, voltage sensor outputs along with the clear indications, comparison which Rob shows in this video and at least comprehends somewhat about the possible issues, which You clearly have no idea, concept or clue, but Your self-proclaimed imagined, contrived nonsense. If You will ever gain the basics about electricity, electrical voltages, as the simple DC variations from sensor outputs, then You may begin to possibly comprehend the possible, simple causes as inn my descriptions. My basic knowledge form my first basic electricity course within 8th Grade IE, 50 years ago, is enough to comprehend, assess, evaluate, differentiate, discern, thus troubleshoot, determine the cause of the clearly noticeable problem. Certainly my further development is just more extensive into proper design, development, etc. Your idea clearly indicates Your lacking with basic information about the sensors, voltage outputs, standards, etc. Good Luck within Your ignorance. All The Best, if You choose to improve, grow, learn, develop. Sincerely
I would recommend installing wheel speed sensors on each wheel in addition to a ground speed sensor to tune the traction control system. Data collection and analysis will help improve the performance of the car at this point in your build.
10:56 see the Speedo jump up & down. As you said, gotta figure out the wheel speed issue. I remember seeing wheel wobble on one of your old dyno vids. Perhaps check that out. Nice runs. Keep it up!
It may be worth adding a lowpass filter on the wheelspeed sensors if it is only noise on those speed curves. That would be a fast way to eliminate that issue before trying to address the cause of it.
Congrats Rob! I'm glad you made one of the best custom vehicles of last and this decade in the World! Now it's time to make the car aero stable at high speeds. You need to create more downforce. The car is loosing contact with the ground, that's why the car is dancing after 160 and your traction and stability control is going crazy. Look at what the Lotus 78 and 79 F1 cars did for reference for more downforce without much drag penalty. Stay safe! Cheers!
Before you even did the run I noticed at 4:57 the car seemed to wobble a little bit. I think there might be something loose in the suspension maybe? I don’t think it’s only at high speeds, it’s just more noticeable after you let off the gas and you’re “cruising” at high speed. I had an identical issue in my subaru touring racecar and it ended up being a bunch of suspension components being loose at once somehow (probably hit some kerbs too hard).
The last shot of the car pulling away was a spitting image of the hoonicorn in prime condition. It’s so amazing seeing the four rotor embody its inspiration so well after all these years of hard work. Fantastic job you guys, can’t wait to see more!!
13:37 length video. Intentional or not, nice
no, i wanted a 40 minute video 🥲
Leet
:D
13:37 minute long video on a 1337hp car, now that's leet!
Came to say the same thing. Especially after his last 1337 comment :)
I think the pulls perfectly show how much ground affect aero the car is generating compared to the ferrari by how much dust kicked up
Omg good point!
I wanna point this out but you already says that and ground effect is really sketchy….even current F1 aero struggle with that last year 😂
@@RobDahm thought the same thing, the car kicks dust like a current generation f1 cars
But something isn't quite right but I'm sure you will figure it out
Wind tunnel is the only answer at this point I think. (at least once all the body/aero is on the car as it's final form is going to be... This iteration's at least anyway 😜)
My non-engineered youtube science says most of the dust kick-up is just the rear diffuser. Doing exactly what it should; what is missing is the rest of the ground aero. WIth how important aerodynamics are, this should be the focus for Rob. Making sure all those holes inside get covered so the air is going over and under. Right now I imagine the inside is just causing so much drag. Wheels need more aero to remove dirty air as well. With a focus on aero and then tuning the car, it would be easier to deal with. Tuning a car now seems like learning how to tune a parachute full of air.
~I made this comment before the ending of the vid where Rob even mentions aero. Love all your videos Rob, been watching very early on. Happy you are sharing this journey with the rest of us.
Congratulations Rob!! 🤘 The car is running absolutely wicked!
When TRC showing love, you definitely did something right🔥
It definitely wasn't dufuq...u watching the same video?!
I bet it breaks after 10 runs... all cars like this are junk... just people trying to be "fast" I bet a stock tesla plaid would beat that pos and never break that running 10 times is guaranteed to break
@@S2KCYA xdddd
@@S2KCYAlol you must be new here 😂😅😂😅
Thought the title said, "AWD 4 rotor breaks in half"
🤣🤣
Someday. Not today 😂
I’m glad I’m not the only one that Mis read the title lol
@@RobDahm God, I hope not
2wd 2 rotor lol
"We went to 60 pounds of boost" is one hell of a way to end on a cliffhanger! lmao
Congrats to you and your team on coming so far! You're such an unintentional motivational speaker and every time I see your vids I want to go work on my project lol
4 bars, that's some serious diese engine boost
Where's the next video?
Watching the 4 rotor take that Ferrari in the top end once it's caught traction and hitting full boost really shows how fast that thing is. Would love to see what this thing can do on a prepped surface!
And that ferrari is sf90 i think which is very very fast
@@rishabhbhatt1393 It is, which is the fastest Ferrari ever made.
Not only that, but Rob said that he only was in the high 20s psi range for boost and it can go up into the 40's... the thing is gonna be a Dorito missel.
That AWD burnout was crazy
NO SHIT! Put some tires on the damn thing! Spinning tires, loud revs... doesnt really do anything! If its going to be a drag car.. or at least try.. gotta do it right!
such a pleasure to see this car running. i've been following you since the birth of the idea and i never believed you would really make it. but here i am looking like a fool for doubting you. so happy for you that you made that dream come true! truely something only a few people are able to achieve!
You need to windtunnel the 4-rotor, and you should look into em shielding for the wires to the wheel speed sensors
agreed
Yup. At this point, the things that keep the car from performing aren't the running body, rather the body itself.
agreed
@shrerd1894; clearly You lack the proper basics about electrical, digital signals, wiring, etc.
A. The variations, spikes with the digital speed sensor are clearly clean, stable until much higher speeds -> thus clearly NOT an issue with any interference !
B. Thus, clearly, obviously, certain the issue is intermittent connection at higher speeds, RPM
1. The first area to check are the connections, connectors from the wires of the sensor(s), which are vulnerable to the vibrations, due to higher RPM and wind speeds,.
2. The next is to verify the wires inside the sensor and sensor itself - this should have shown up with proper high speed testing on the dynometer, but perhaps they did not operate the vehicle at these higher RPM speeds
3. Also the actual higher speed driving, especially on this aircraft runway, has additional variations, vibrations, along with the high speed air flow during very high speed travel as this
4. For these reasons, basis, poper planning, connectors, connections, wiring, sensors must be proper, carefully selected, chosen, wired, installed as those within aircraft, high speed vehicles as F1, Indy, NASCAR, NHRA/IHRA/PDRA, others
5. typical "Trial & Error" process among the amateurs, novice, platform-video producers, including many which modify, build performance level vehicles, many for drag, track, other racing but not trained properly,lack the proper knowledge, especially within safety are extremely common and should be clear, obvious to humans with proper basic thinking as examples of "what NOT to do"-"NOT follow", don't do as they do with their mistakes, errors, claims etc.
All The Best
@@newtonfirefly3584 > *pushes up glasses*
>Akshually
>First draft of college thesis
This isn't Reddit dude, and I'm not reading all of that.
The way the 4 rotor just lunges past supercars in the high 100's is something I've never seen before! We all know Rob and the team have built something special, but I think we've only seen the beginning of what it's capable of!
There was something very wholesome about this video.
Really enjoyed it, especially the 1st half covering the road trip and early stages of the event.
I wonder if not having the rear window in place is messing up the air around the wing. Is there a reason the rear window is missing?
With this much power some time in a wind tunnel might not be a bad idea.
Love your videos Rob. It’s been a real pleasure watching your journey unfold.
he blew it out drag racing for the Show Banging gears
Can we take a moment to appreciate the friendship these guys have on top of their business? Love it man, love what you do.
Absolutely. The dynamic between them is so relaxed. True friendship is immeasurable in value and a beautiful thing to watch.
0:00 Good call kid.
Congratulations team Dahm. Just awesome.
Congratulations, Rob! You and your team have been kicking ass. Awesome to see how far you've come!
Aerodynamics. All the air blowing into the car past the engine. Hope you have a good fire suit.
(after following this build for 7 years): oh yea, it’s allll coming together
Such a pleasure to see the 4 rotor drive so well after all those years watching it being build! Finally, love this guys 🎉
Love how comfortable Rob is getting in the car. From the 1st Hoonigan race to this you can see how much more familiar he is.
@ 6:50 Robs expression is one of my favorite vibes, Excited, Focused, Confident, All while thinking over every nut and bolt in the vehicle.
Literally about to go to bed and instant reaction when the notification drops “aight. Guess I’m not sleeping just yet.” *clicks video*
Edit: bruh that wiggle is scary from my PHONE. Well done on getting the record too!!
You're so fuckin right
There is something satisfying in watching your journey with these cars. Like, you actually put the work in yourself on the cars. You often break something on the cars when trying them out, but you're always immediately back to the drawing board to see how you can make it work and get better. It's satisfying when it works out for you. Definitely a good example of a person with determination and good mental attitude. We need more wholesome type of people like you in the car scene.
A milestone for sure. You are a huge inspiration, Rob! Im attempting to follow in your footsteps in my own way. I dont think most people realize how hard it is to do what you are doing, and the sacrifice it requires.
I love how focused you are Rob after the pull against the farrier @12:18 and your talking about the wobble you don't even realize that you've broken your own record🤣 love it man car is absolutely sick and you're doing awesome things
Great work Rob! It was great to meet you and learn that you are absolutely as genuine of a person as your videos represent!
I’ve been watching for awhile now. I’m a Porsche fan but had a friend that had one of those 3 rotors with a turbo. Loved riding around in it. What you’re doing is awesome and your videos are addictive. Love watching you tweak these absolute dragons!🐉
Every single camera angle on the cars are GORGEOUS. Huge compliments to the whole team 💜
You have created a machine of LEGENDARY status Rob. I'm so glad I got to watch the entire progression. What a wild ride of RUclips viewership. Thank you bro.
6:35 Seeing the little boy run from the rev was my favorite part 😂
Imagine showing up in a stupid expensive Ferrari just to get beat by some lunatic with a few Doritos as an engine. 11:09 AND HE REDUCED POWER AND STILL WON.
The first run I was watching the speedo jump all over, it had me so confused. I never would have expected watching your first rx7 video back in the day that things would end up here. Awesome job Rahb! 😂
So true, I remember how he talked in a negative Light about the rotary car in his first video. Most rotary owners go through this and also went through it also and now I am a rotard. A rotard is someone who does not give up on the rotary motor but instead educates himself on how to properly care for it. Rob is a rotard and making great videos for us other rotards. Brap on
stay safe, congrats on the record!!
It was really great meeting you guys and seeing the 4 rotor in person, it's a completely different car in real life 😂
8:01 you can see on the speedometer showing random speed, that wheel sensor doing weird things when you let off throtle at the end of the 1st pass. Same on the 2nd one.
Great Vid.
Peace
Quickly becoming my favourite youtube channel! The mix of building, tech talk and actual driving is spot on
Back to back rob videos. I feel blessed.
Congrats on the record, its well deserved! 😊
I watched this build from day 1 so I feel like "we" built a bad ass car. 11 hrs and 1.06 million views. Congratulations team.
the combination of 4 rotor engine, turbo, and sequential transmission sounds incredible 🤤
Hi Rob, my son and I have enjoyed watching your journey here in New Zealand. I have particularly enjoyed the complexity of the build. I believe while watching your runs, you have an air separation problem. Your cabin is open at the bottom and top. We will be interested in your verdict. Keep the rubber on the ground.
Nice work Rob. For safety purpose, I would definetly check to see why the car gets upset at high speed. There is no doubt that you will make the 200 club. Brap on Rob
1:42 crazy that I knew exactly where you guys were based on that stretch of road between the carved out hills, I've driven through there dozens of times to and from San Antonio! Most pretty part of Texas, IMO.
Congrats dude! Way to keep that beast under control in those conditions.
Keep up the great work, Rob and team. I am proud of all the work you have done and the positive energy you bring to the rotory/car community.
I am living vicariously through you as my FD has been put on hold for a long time now.
One day I'll join you on the road.
If Rob dropped a 4 hour video about the ECU magic he's doing and other random info about the car I would watch it all and still want more cause this car is so awesome.
That no lag, full boost at second gear vs Ferrari. What a beautyfull sound.
The lack of anti-roll bars might be part of why you're having so many problems with high-speed stability. Adam LZ had the same issue with his Barra-swapped GT350.
No doubt. Had a sway bar beat the new bushings out on a turbo vehicle I own and top speed it would rock side to side. To the point it seemed one minor movement of the steering wheel the car would lose control.
Except for the fact this doesn't have a normal suspension.
@@x808drifter Still need anti-roll bars of some sort. The mechanics of the instability don't change, just the motion ratios on the suspension components themselves. Without something to suppress the roll, it'll just continue oscillating and only worsen as speed rises.
Been watching rob for years ever since he got his air shifter in, absolutely makes me keep goals in line
In the end, when Dahm said "We hit 60 pounds of boost". My jaw dropped and I got all hyped for the next video. Bro I can wait to see the numbers, and here that beautiful car sing.
Rob is such a good sport. Im glad to see his success with this car and im a rotary enthisiast myself. I had a beefed Rx2 when i was 17 and a stock RX7 some yrs later.
Seeing you finally getting to get out there and race your cars is pretty damn amazing
That thumbnail thooo!!! Super stoked you used it!!
I wonder if the lack of a rear hatch is causing some significant turbulence, maybe even negating the affect of the wing?
I think you hit the head of the nail there
It is very very VERY probably that's the reason of it
I am so glad to see you come so far rob, i cannot imagine it. Seeing you be so dedicated and passionate to improve and get the rx better is outstanding. It is really good to see you make such videos and maybe one day i would meet you at a car meet or an event. Keep making great videos and i wish you prosperity and well being. Much love :)
Well done Rob and team. Although I'm not surprised, you guys have put in a mountain of work and RnD. Massive congrats and guh damn that thing sounds nice!
You really need to close on the interior. Aero has to be killing this thing
I was there to see your three rotor half mile run which seems like forever ago now but this car is in a totally different League, I wish I was there to watch a few runs with the 4 rotor because it's definitely a once-in-a-lifetime experience if you live where I live you're never going to see stuff like this unless you go looking for it far away and other states lol
Been following for a while now, happy for you! I know it's been a stressful journey. Good job man!!
the vibe of these videos & the acom[lishments yall have been consistently putting out is 10/10 my dudes.
also, Isiah is heady af. He is like the fab god equivalent of a master glass blower. I know yall jokingly fry him for his drip, but he dead ass reminds me of multiple cool ass guys I know with over $300k in their glass, EACH. He'd fit right in at the glass shows i've been too & everyone would be stoked on his Tig work too.
Haven't been to this channel and randomly saw this vid. Great stuff guys!
i was terrified of the trans being open but honestly seeing the 4 on the track racing has been such an amazing feeling. Congrats rob your dream is so close to beeing 100% complete but we all know that 100% never feel enough so we look for another .001% we could squeeze out ahaha much love rob
Mad respect, from new zealand, love what you are doing in the rotor space.
This thing was MEANT to break records! How many more can you go for?!?!
most rotors shot into orbit after hitting 60psi boost
Fastest rotary is like being the smartest retard.
6:08 that’s me rubbing my eyes cause it’s too early for this😐😂
Awesome video. I'd get a rear window in and see what effect that has. You ever had a car that makes that throbbing sound when you open the rear windows? Plus the air going over the top of the car and hitting the spoiler might be getting disturbed. Aero tunnel would be really interesting
I was also wondering if having the rear window in would help.
Unbelievable. From all of the doubts years ago to doing this, hoonigan, breaking records, and having a sick looking 4 rotor AWD RX7. Really unreal.
Broke the record and looked so good doing it. Here's to keep improving that record!
For towing buy a couple sets of "axle tie down straps". You can wrap them around the tires (or axle) pretty easy without damage to wheels or straps. Minimum of 24" length. If you want the ultimate no hassle strap search "strapinno" retractable ratchet straps with the snap hook option. It will cut your strap setup time by 80%. No more rats nest of straps when not in use or in transit.
Rob do you think the exhaust venting out the side affects your aerodynamics at high speed? See if there is someone out there that can do CFD on it to keep you safe bro. Good stuff on all the accomplishments. 👍
The lack of rear window is a bigger issue...
What a missed opportunity! I live on the west side of San Antonio. Congratulations on the performance.
Weird, I don't think it would be an aerodynamic problem considering its only one side of the car doing the wobble. Your car is pretty much mirrored underneath I would imagine, so I would try fixing the sensor problems first. Kind of reminds me of the F1 porpoising problem they had for a while. Downforce increases to a point where it stalls out, then goes back up and repeats.
Awesome racing this weekend had a blast and this Mazda was ROOOLLIINNGG!!!!
As always, the hard part is not building an engine with tonne of power, it's putting that power down in a stable and reliable way
Great job!!! Like you said, track was very slippery, I was there Sunday and spun out on my 4th run.
Man, I had an '06 Hawkeye STI that would speed wobble on decel that was absolutely terrifying. Watching the onboard camera angle instantly brought back some "OH SHIT!" memories. It's unsettling to say the least. Mine was caused by the rear passenger side wheel bearing being shot and having a bunch of rolling resistance on it. The wheel bearing didn't have any wobble or play in it, it just didn't roll well. It took forever to figure that out.
Seen a thing on jack staps the other day I never thought about but you need to make sure there are a couple wraps around the cylinder before it starts tightening. This makes sure you get friction and hold the strap tight.
Congratz on the new PB/record! I'm wondering if you have a traction control issue due to front/rear tire diameter expansion variations at high speeds. Can you see the mph speed of the front axles vs. rear axles in the logs? Are you running 555R's on front and rears or slicks? I'm sure you'll fix all the issues. Looking forward to your next videos
This is the first 4 rotot video ive watched in 4 years ago, when you said the car would be done next week...it appears finally done
Two theoretical things here, would having a rear window in place help clean up the air? Also, I wonder if a carbon shark fin, similar to what you'd find on the AMG One, or the Jesko, help keep the car straight at high speeds. Would be cool to see one integrated into the rear window, should you go plexiglass (with F40 style vents 😊).
Clearly KC, You know nothing about "Theory", proper principles, ideas, concepts, though You did clearly properly figure the issue is with speed, though clearly lack the proper basics with aerodynamics, electrical and the effects of the variations, varying speed sensor voltage to the ECU which affects the vehicle operation including driving stability, as Rob directly stated [at least he knows it does affect this, since he arranged the ECU to use this information within its controls]
Good Luck, All The Best, Sincerely
@@newtonfirefly3584 coooooooool story brother!
@@kc550 KC, Clearly You lack with what is a 'story' as You do with "Theory", principles, physics, science, mathematics, logic, reason and 'common sense', which is no longer common and extremely rare !
Thankfully amwell trained, developed with these and my given abilities, capabilities, attributes, aspects, talents over my lifetime [63 + years] and continuing with improvement, development, expertise, design, etc.
Good Luck
@Newton Firefly ...he's still going...
@@kc550 exactly ... still going.... going ... going ... and going ... never complete
speedo was going nuts, up and down so def a sensor issue.
great run !
I would check the specs for those wheel speed sensors and see what the max rpm they can read is.
Clearly You lack the obvious, clear issue with intermittent, quickly varying voltage as seen in the ECU data and on the speedometer !!
The issue is clearly NOT limits with the speed sensor, else it would have reached its upper voltage limit and either remained [as would be expected] or alternatively with a poor design dropped to zero !!
Another individual with simple lacking of the basics with electricity, electrical voltage, sensor outputs, ECU data.
Goo Luck, All The Best, Sincerely
@@newtonfirefly3584 Perhaps instead of being condescending, try being constructive. And instead of putting people down try engaging in a discussion. If we apply some logic to the situation it is apparent that all 4 wheel speed sensors are reading all over the place. That tells me it is unlikely to be a single sensor that is bad and even less likely for it to be a wiring issue such as chaffed wires. Now as far as my understanding goes the wheel speed sensors are putting out pulses which are read by the ECU. Those pulses could be coming fast enough that capacitance in the wiring attenuates the pulses enough that the ECU has trouble accurately reading them. Or it could be that the sensors are not capable of reading a trigger wheel going that fast. Seeing as I do not have the model number of the wheel speed sensors, and I don't have the time to look for it in the videos, I will elect to just speculate.
@@ryanhebron4287 Ryan Hebron, clearly You have trouble differentiating between criticism, conveying proper information and condescending.
My comments are directed to those like You to be aware of the nonsense Rob Dahm presents, does and proceeds with including the disregard for his own safety, life and those around him that he affects along with those that are easily influenced.
Already have attempted many comments directed specifically to Rob Dahm, including with specific suggestions as contacting FuelTech, Anderson Dick, Luis and their dedicated rotary expert, but he continues to proceed within his mindset, arrogance, etc., refusing to make any effort.
In addition, Your ideas about what You describe as "pulses" clearly indicates Your basic lacking with electrical voltages, voltage variations, voltage sensor outputs along with the clear indications, comparison which Rob shows in this video and at least comprehends somewhat about the possible issues, which You clearly have no idea, concept or clue, but Your self-proclaimed imagined, contrived nonsense.
If You will ever gain the basics about electricity, electrical voltages, as the simple DC variations from sensor outputs, then You may begin to possibly comprehend the possible, simple causes as inn my descriptions.
My basic knowledge form my first basic electricity course within 8th Grade IE, 50 years ago, is enough to comprehend, assess, evaluate, differentiate, discern, thus troubleshoot, determine the cause of the clearly noticeable problem. Certainly my further development is just more extensive into proper design, development, etc.
Your idea clearly indicates Your lacking with basic information about the sensors, voltage outputs, standards, etc.
Good Luck within Your ignorance.
All The Best, if You choose to improve, grow, learn, develop. Sincerely
I would recommend installing wheel speed sensors on each wheel in addition to a ground speed sensor to tune the traction control system. Data collection and analysis will help improve the performance of the car at this point in your build.
Not having rear glass also has a big effect on that rear wing.
Congrats rob I was working the other day but you came through my hometown Bandera, sad I missed seeing the car in person but hopefully will
10:56 see the Speedo jump up & down.
As you said, gotta figure out the wheel speed issue. I remember seeing wheel wobble on one of your old dyno vids. Perhaps check that out.
Nice runs. Keep it up!
Just like a kid in the candy store, its contagious to see how happy you look with the car!!
wow this was a long time coming, proud of u rob! 🎉
It may be worth adding a lowpass filter on the wheelspeed sensors if it is only noise on those speed curves. That would be a fast way to eliminate that issue before trying to address the cause of it.
Congrats Rob! I'm glad you made one of the best custom vehicles of last and this decade in the World!
Now it's time to make the car aero stable at high speeds. You need to create more downforce. The car is loosing contact with the ground, that's why the car is dancing after 160 and your traction and stability control is going crazy.
Look at what the Lotus 78 and 79 F1 cars did for reference for more downforce without much drag penalty.
Stay safe!
Cheers!
All that work, all the money spent etc all worth just for this moment @6:36 👌 sawing seeds 😁
HOLY CRAP!!! Bandera, TX is my home town! I NEVER expected to see it on your channel! That's crazy!
first and foremost, congrats on a million! second, altezza changes are the most important changes to consider when beating your own records. =D
Love to see ya still going
Before you even did the run I noticed at 4:57 the car seemed to wobble a little bit. I think there might be something loose in the suspension maybe? I don’t think it’s only at high speeds, it’s just more noticeable after you let off the gas and you’re “cruising” at high speed. I had an identical issue in my subaru touring racecar and it ended up being a bunch of suspension components being loose at once somehow (probably hit some kerbs too hard).
Thanks for bringing some fun to my small town. It was a pleasure meeting y'all. Good luck with the fixes and can't wait to see what's next.
The last shot of the car pulling away was a spitting image of the hoonicorn in prime condition. It’s so amazing seeing the four rotor embody its inspiration so well after all these years of hard work. Fantastic job you guys, can’t wait to see more!!
Dahm, if you’re ever on the Vegas streets with this beauty, id love to take photos of it!
Absolutely fantastic work, all that hard work and years of effort starting to pay off. The wiggle at the top end is interesting.
The sound of it you litteraly built what I’ve always dreamed to see
Congratulations @ROBDAHM, keep up the great work and stay safe.
🥊 🥊 🥊 👍🏻 👍🏻 👍🏻
Every time Rob turns on the 4 banger, it just sounds angry AF. Thanks bud for sharing your smiles with us
Great production quality on this one