Expert insights on (probably) the most impressive 4 Rotor AWD RX7 EVER.
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- Опубликовано: 21 июл 2024
- 4 Rotor AWD FD RX7 | @RobDahm 1240HP+ Quad Rotor Build #techtalk This is a big one full of tech and some interesting A-B part testing insights.
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Running an R32 GTR transfer box off the back of a Holinger RD6, @wintersperformanceproducts Quick Change rear differential, @haltech R5 NEXUS ECU/PDM, @GarrettTurbos 94mm OR 106mm turbo, Clearview oil filtration system along with Ti Automotive a dual brushless pump setup among a long list of other parts, we caught up with Rob Dahm at @semashow to discuss his ever-evolving and now essentially complete FD RX7 quad rotor build.
The Haltech R5 doesn't just handle engine management; the built-in PDM also controls many of the electrical components leaving the car without fuses or relays. A standalone @ECUMasterUSA PMU splits this duty in 2 adding redundancy plus more inputs and outputs. A @FuelTechUSA FTSpark Capacitive Discharge Ignition (CDI) also helps in the ignition department. Interestingly this build draws up to 80amps, and as you can see (and hear) Rob has made sure that isn't an issue with this setup.
Traction control is also handled by the Haltech R5 via a Nissan ATTESA-based control system and some 'fettling' by Rob which allows him to demand a dynamic or set torque ratio between the front and rear of the car allowing for versatility when launching and cornering across many surface conditions. We also touch on some Nikasil-style coating that is used to make sure aluminium and steel alloys play together nicely. Interestingly the engine is clearanced specifically for @valvoline 20-50 oil which shows the level of detail this build has reached.
The long list of topics continues with Precision Engineering eccentric shafts, rotary irons, apex seals, 16 point total TPMS (tyre pressure monitoring system) and the gremlins auxiliary systems can cause a rotary engine.
Last time we spoke to Rob he mentioned his interest in more A-B testing, and he has followed through on this and discussed some poor injector placement and cooling issues that upon investigation and data collection he has resolved often by taking it upon himself to learn the skills to do the job himself. Machine work, wiring and tuning are just a few skills he has picked up as a direct result of this build.
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TIME STAMPS:
0:00 - FD RX7 AWD Tube Frame 4 Rotor
0:24 - Even More Hands On Since Last Chat
1:38 - Style Props
1:48 - Put Your Mind To It, Dive In
2:01 - Theory Vs Reality: Intercooler Example
3:15 - Injector Data & Placement (For 16 Injectors)
3:58 - 4 Rotor Engine Development
5:05 - Machining Demands
6:29 - Billet Rotary Irons
7:42 - Clarification on Coatings & Metal Combinations
8:16 - X-Raying For Metal Composition & Data
8:59 - Cooling - Cast Vs Aluminium Testing
10:20 - No OEM 4 Rotor Parts
10:37 - Eccentric Shaft Support & Improvements
12:20 - 8,000rpm and 1240hp, Things Bend/Flex
12:46 - Rotary Reliability Testing: Ridigity
13:38 - 39psi Vs Ken Block Dowel Example
14:40 - Torsional Forces At Launch
15:04 - Porting: 4 Rotor Setup
16:06 - Peripheral & Semi-Peripheral Port Explanation
16:50 - Apex Seals Vs Porting
17:42 - Apex Seal Purpose & Options
18:38 - Apex Seal Scanning & Heat Treating
19:40 - Best Apex Seal.....For What?
20:40 - Stock Seals & More Torque Than An LS V8
21:38 - Electronics: Haltech R5 Nexus
23:12 - R32 GTR ATTESA Based Traction Control System
24:00 - Torque Split Explanation
24:20 - Launching Strategy
25:41 - Haltech R5 Thoughts and Logging
27:26 - PDM - Power Distribution Module
28:16 - Ignition System
28:53 - Spreading Electrical Load
29:34 - Rotary Problems Come From Auxiliary Problems
30:10 - Rotary Engine Reputation
30:59 - Thanks Rob
31:32 - Do What Rob Did And Work On Your Own Project, Big Or Small, It Doesn't Matter
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TAGS:
#highperformanceacademy #robdahm #4rotor #quadrotor #fdrx7 #rx7 #semashow #apexseal #rotary #wankel #rotor #learntotune #enginebuilding101 #dontletthesmokeout #wiring101 #dieseltuning #datanerd #gofasterwithdata #racecraft #learndriveoptimise #motorsport 
Авто/Мото
There is a LOT going on in this interview! Great to catch up with Rob again and you can just feel the passion dripping off this guy for what he is up to here, it's awesome. Hope you guys enjoy it 😎 - Taz.
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TIME STAMPS:
0:00 - FD RX7 AWD Tube Frame 4 Rotor
0:24 - Even More Hands On Since Last Chat
1:38 - Style Props
1:48 - Put Your Mind To It, Dive In
2:01 - Theory Vs Reality: Intercooler Example
3:15 - Injector Data & Placement (For 16 Injectors)
3:58 - 4 Rotor Engine Development
5:05 - Machining Demands
6:29 - Billet Rotary Irons
7:42 - Clarification on Coatings & Metal Combinations
8:16 - X-Raying For Metal Composition & Data
8:59 - Cooling - Cast Vs Aluminium Testing
10:20 - No OEM 4 Rotor Parts
10:37 - Eccentric Shaft Support & Improvements
12:20 - 8,000rpm and 1240hp, Things Bend/Flex
12:46 - Rotary Reliability Testing: Ridigity
13:38 - 39psi Vs Ken Block Dowel Example
14:40 - Torsional Forces At Launch
15:04 - Porting: 4 Rotor Setup
16:06 - Peripheral & Semi-Peripheral Port Explanation
16:50 - Apex Seals Vs Porting
17:42 - Apex Seal Purpose & Options
18:38 - Apex Seal Scanning & Heat Treating
19:40 - Best Apex Seal.....For What?
20:40 - Stock Seals & More Torque Than An LS V8
21:38 - Electronics: Haltech R5 Nexus
23:12 - R32 GTR ATTESA Based Traction Control System
24:00 - Torque Split Explanation
24:20 - Launching Strategy
25:41 - Haltech R5 Thoughts and Logging
27:26 - PDM - Power Distribution Module
28:16 - Ignition System
28:53 - Spreading Electrical Load
29:34 - Rotary Problems Come From Auxiliary Problems
30:10 - Rotary Engine Reputation
30:59 - Thanks Rob
31:32 - Do What Rob Did And Work On Your Own Project, Big Or Small, It Doesn't Matter
Taz with the timestamps being the MVP of HPA, as always. 😎👍 Prayers for our brothers and sisters up around the Coromandel. Cyclone Gabrielle was already huge when she passed by my neck of the woods 2 weeks ago so I knew how bad it was gonna get down there. 🙏
Rob's openness about the rotary engine and it's intricacies is exactly what the community needed to help it grow. A lot of the information he provides is hush hush and he's changed that for the better. It seems HP Academy helping him grow has had an even deeper impact then you might have thought. Cheers.
There is a lot behind this but humans as a whole have repeatedly withheld knowledge from others to benefit themselves for a millennia. I believe in sharing all the knowledge I know in hopes others around me will share theirs.😜
Rob is a mad scientist
That car is literally junk I just watched it race on hoonigan
@@ryanshiver9044 do better then.
@@gregroles69 I just watched it fail in a 2nd hoonigan race 2 days ago, it's shit like all rotary
I've been waiting for this episode. Rob is the one who turned me to HP academy, and the reason why I became a VIP
That's awesome! Rob has promoted us a lot (which we really appreciate!). We were stoked to see him in the tee although it threw Andre for a second as usually he's talking to Ben or one of us staff here when that logo is on someone's chest haha
I hope you used Rob's affiliate link as well! Anyone reading this, if he or anyone else with an HPA link sends you our way make sure you use it as it helps them out too 😎 - Taz.
Reason why i bought one of their online courses too!
He's one of the inspirations for me working on my own car. He started with zero to little knowledge on cars and hit the books. Now, look at him! I think my favorite thing about him is he's not afraid to fail and share why. I've seen his engines go through havoc on his vlogs and stuff and man. His heartache normalizes my heartache so i don't get so down on myself.
It's insane how 6 years of development by 3 dudes in a shed can do, they literally had (basically) 0 knowledge
@@RENO_K mfw they all put in enough time to get a degree in auto tech
28:25 the reaction when he casually drops 80A of load running just spark lol
I've followed Rob's incredible journey almost since the start of his channel. I love how he is transparent with his followers and we see his mistakes - and I also learned how to tune my engines because of HPA.
Rob did a 1500bhp 4 Rotor, tubular frame RX7. I did a 1994 Celica GT-Four with a new turbo! Differences and goals.
GREAT, GREAT INTERVIEW
Once Rob starts rattling about details he just KEEPS going and going. Passion in it's purest form.
Andre, you finally interviewed a guy you can talk more than you. Love you guys!
Rob is our stateside RE Amemiya ! always innovating and never afraid to try new things.
I wonder if Rob switched t-shirts when he knew Andre was coming with the camera, or if he had that shirt on all day. I could see it going either way.
Reckon he's got 8 on so he's prepared to un-layer for any occasion? Christmas jumper from nan, one from Andre, a few Valvoline ones then something flashly for dinner parties all ready to go at the drop of an awkward arm jiggle and belly flash?
Wish I was that prepared, I swear remembering undies is hard enough some days 😎 - Taz.
He wears that shirt fairly regularly lol.
_Rob has phenomenal knowledge, and a fantastic ability to clearly convey it all. Thank you for this interview._
The interview Yall did with Andy and his enthusiasm helped convince me to order an R5.
Andy is one of the smartest guys in the industry, and also a really nice guy. Hope you're enjoying your R5, we haven't had a chance to fit ours yet. There's an R3 on the way now too, Andy and the Haltech team are busy 😎 - Taz.
rotor daddy is here!
Incredible interview. I could honestly listen to him all day. The passion, the knowledge and transparency are what the rotary community needed. What an ambassador he is.
This Channel just keeps reminding me why I love cars.
gonna be a great year for Rob with this car !
I love Rob but he throws so much information at you so quickly in his videos that at times its easy to miss things. This interview was extremely well done and helped keep the topics a little more focused. In doing so you guys helped me learn more about the 4 rotor despite the fact that I've seen every one of his videos!
Great work and thank you very much!
These two guys have been so helpful in supporting the rotary enthusiast community!
Love this video! Been following Rob and HPA for a long time and I love seeing two people who support each other so much finally come together. Like 2 peas in a pod!
My favourite performance interviewer interviewing one of my favourite builders, love it
Cheers for the support! - Taz.
It's been quite a journey watching him hoon, break, re-engineer and hoon again. So much drama with this project its nearly a soap opera. We've laughed, we've cried
And he's here to tell the tale
Topps up HP
What an awesome guy. I love to see the thought and love he’s put into that car. He’s a sponge for taking in information then deciphering it and making it work for him.
Rob is one of the main guys that motivated me into doing my own tuning and doing the HP Academy courses. Purchased a couple of courses not too long ago and that gave me the confidence to rescale my MAF on my own. Been using EcuTek and I'm super happy I've started learning to do my own EFI tuning. Next steps are fuel and timing tables.
Good luck dude!
That moment when the interviewer is a fan of the interviewee is a fan of the interviewer
Awesome!!!
Giving credit where its due! HPA you absolute legends!
Best Rob interview yet. Thank you for this. Been very interested in the progression of is 4 rotor and a huge fan so you hit a lot of questions that helped in the understanding of it. Are you as impressed with it as I am?
As a Electronic engineer nerd, listening to one nerd interviewing another nerd.... The part that finally made me gasp was......
80A on the IGN circuit...................... Brought tears to my eyes....
Great video as always guys been waiting for this a while, and thank you HP academy for the free stuff you put out really helps getting a deeper understanding in tuning!
This was such a chill and engaging interview. Rob really bringing his enthusiasm to it.
Loved it!
Gotta love Rob, he really displays what a bit of curiosity could do.. man had no idea what he was doing at ALL when he started. Big props.
Just discovered this channel. WHERE HAVE YOU GUYS BEEN FOR THE LAST 4 YEARS OF MY ENTHUSIASM. Will be purchasing your courses for sure!!
Fantastic video guys! Thank you for continually putting out such quality content!!
Cheers Noah, appreciate the support from you guys, and also from guests like Rob. The time people take out from busy events like SEMA to talk to us is amazing. We have about 40 interviews to come yet (another one with Rob too that is even longer!), we've just been a bit short-staffed to get them out sooner for you, but better late than never 😎 - Taz
@@hpa101Alright I’m super glad to hear that!! Looking forward to every minute of it mate 😎
Fantastic interview, thanks. Big fan of Dahm's content but he has been doing it so long you don't really get that high-level overview anymore unless you go back and re-watch old content. Great guided discussion.
An EXCELLENT interview! Thank you, thank you, thank you!
Love the insight and the excitement given off when speaking about his car. Shows the difference between, when you build it yourself and when you have someone do it for you.
Wow! That was such a thorough, deep-dive into the kind of consideration that goes into running a four-rotor.
Excellent work from both Rob and Andre :)
Quality content fellas , love a good in depth yarn like this about the triangle.
I know Rob but i really like how the interviewer is able to break down topics to be easily consumable. Makes me believe that the HPA is really effective
13:38 Rip Ken Block
A massive loss 😢 - Taz.
Crazy been watching both channels, so cool to see this video. Love the videos!!
That KEEPS is really working on Rob’s hair LOL
Wow great interview, lots of information to take in here. Great work guys.
Pretty awesome to see Rob being able to nerd out about his build. Very entertaining and informative. 👍 loved the video
Love watching Robs content and with his rotor connection to NZ and our long love with the motor...
We need a rotary engine building course from HPA!
Yes!!
Just review all of Robs work, very detailed and comprehensive
Sweet video. Loved the details. I don’t even own a rotary. But I needed this information
Excellent interview. I've seen everything on this car so I expected to not finish this 30 minute interview, but I was wrong. Watched the whole thing. Might watch it again. Lol
What a great interview
Great dude and great car....thanks HPAcademy 👍🏽
Andrew Simon walking Legend. Still remember travelling from Kaikohe to the drags when you unveiled Docile was a good weekend in the 2000s.
Two great minds, that's what happens when two technical gurus collaborate
Rob is a legend! And what a great interview. Very enjoyable and thanks for all the info.
awesome interview. thank you guys
Our pleasure!
brilliant people to deal with very high intelligence level. great work
Great interview.
Cheers Dan, glad you enjoyed it - Taz,
Rob is such a legend, and one of the coolest cars in the world. Great interview!
Take $50 USD off ANY HP Academy course with this coupon: RUclips50
Enroll now: hpcdmy.co/50offytc - Taz 👨🏻
I've been watching R^HB build this for the last 3 years
That car is insane.
Always loved rotary engines since my 85 Gsl I bought when I was a freshman in high school.
I'd like to build a naturally aspirated 4 rotor in a tube chassis with a 3rd gen body some day.
I would happily watch an endless feed of these two talking cars.
lmao @ 19:53 "its maam!"
Great info.
🏁😎👍👍
Glad you enjoyed it!
Great episode 🤘
Good stuff
Protect Rob at all costs
I want to do a turbo 2 rotor AWD swap in my 95' Honda Civic, I think that would be pretty snazzy.
Edit: Because of Rob lol
AWD with CRV running gear would be cool 😎
@@fullsendmarinedarwin7244 I think the only thing I'd have to really look into would be the adapter plate to the trans, clutch spacing and all that. Rverything else would be regular swap stuff. Plenty of room in the engine bay for activities lol
Honestly the sickest 4 rotor Fd rx-7 build I’ve ever seen, another good example is Mazzei’s formula 7 4 rotor turbo rx-7
Come a long way…props
Everybody forgets 1978 the s1 rx7 came out it had a factory 300k warrenty..as long as warm up and cool down was observed and servicing they did it
Rob is such a nerd, and I LOVE IT !
Anyone else LOL at the guy at approx. 27:45? He starts picking his nose. Realizes they're filming and slowly backs out of frame. Effing legend! Exit stage left. Poor bastard has been immortalized. May the clipping begin.
So much knowledge
rob is the king 🔥🔥🔥
I've always wanted to do a rotary Mr2 buid
Weird!? Andre you just got the best plug that ever could be. Look what you guys have helped create
Who knew that Rob was an excellent interview! I always feel his channel was tough to watch because of his stream of consciousness style. It's totally different with a moderator
I could hear those two all day
I predict this will be your most viewed video to date.
What's the bet? A bag of pineapple lumps? 😂
It's off to a great start and there are a ton of really engaging topics so I wouldn't bet against you myself 😎 View numbers aren't super important vs the type of person that is watching, but it's always nice to know a lot of interesting content has reached a lot of people who can learn from it, use it, or just enjoy it. Win, win, win - Taz.
You guys really are the best at what you do though. No one goes in depth an explains things in a way for anyone to understand the way you guys do.
Rob! If it's finished, GET SOME SLEEP!
This thing has to prove itself. Once I see gridlife lap times, fl2k 1/4 mile times, 1/2 mile top speeds then I'll buy the hype.
On paper it looks sick, but It's about time we see the reality.
@ 23:30 some guy takes a pic of the VIN on Robs car. Anyone have a clue as to why? Just seems a bit odd unless you are a cop or repo man.
The man who ripped the veil of the rotary world, I’ve always hated on people who has the knowledge and don’t share their impressions on a topic
AHHHHHHHHHHHHHH, I was scratching my chin, pulling cat hair out of my 'beard' (stubble) a bit, when I looked up to see a whispy-hanger from Andre's chin 😂
Epic!
LOVE THIS CHANNEL AND ROBS BUILD..I SUB'D TO HIM BEFORE HE BUILT THE 4 ROTOR SO IM NOT BEING A HATER BUT YOU ASK ROB ABOUT THE RELIABILITY OF THIS 4 ROTOR AND IM CURIOUS HOW MANY MILES THE CAR EVEN HAS ON IT? ID DOUBT IF IT HAS 1000 MILES OF ROAD USE BUT HOURS OF OPERATION IM CURIOUS ABOUT..ROB IF YOUR OUT THERE ?? THAT BALL BEARING E SHAFT IS A SUPER IMPRESSIVE PIECE !!! LOVE HOW ROBS TIRELESSLY ATTEMPTING TO FIND WAYS TO MAKE IT RELIABLE.
I don't think Rob would say it is much either, he was just stating it'd been more than he was promised to expect. He probably won't see all the comments on here but he might see the same question regarding miles on his own channel or an IG post, he seems pretty active on there - Taz.
Wow the cars finished lolololol well done rob,
Looks like someone took to that bonnet with sandpaper 😮
Has Rob ever stated who he bought his wrap material from?
Why is everyone obsessed with Rob's rx-7? It is amazing, no doubt. But Mazzei's Formula 7 Rx-7 was hands down the best ever made...
Love these explanations, very fascinating. RIP Ken Block.
Amazing interview! So much knowledge! Is this how science groupies feel listening to astrophysicists! 🤣
These two guys could be brothers almost
Is it just me or did the guy at 23:25 take a picture of the vin?
23:30 VIN photo?
What's the link to To your website to pick up some classes. 😍🤩
There are some links to free lessons in the description and a ton of content on RUclips for you guys and the site is www.hpacademy.com
Next course due out is one on CAD design, hopefully live today 😎 - Taz.
Second most impressive 4 rotor. Number one goes to mazzei formula’s old 4 rotor build. He sold it to someone who builds monster quarter mile gtr’s.
Love the high level deep dive into research and development. Edit: Great interview with both men being able to riff accurately and effortlessly. Easy watch 🙏🏼
Here for daddy Dahm
23:25 guy takes picture of VIN