Said it before… saying it again. THANK YOU for taking the time to document your projects for OUR benefit Erich! You’re the definition of community! Yo, you gotta explain Jeffy for us. Did his owner move to Guam? And Leddy’s jealous expression in the background was priceless! You rock man!
Being that there's really not a lot of information documented on these hybrid setups or building them, please document everything possible!!! I know it's a lot of work, but I hope not too much 😋 You're the best!
I built one a few years ago. Used the S5 Turbo motor basically with the rx8 crank and timing cover. Made the rx8 intake fit on the s5 engine. And added boost. Ran a after market fuel system just as a piggy back for when in boost. Worked quite well. And i belive its still running
Rx8 rotors machined is the way to go. Several people have tried the older rotors and had their side/corner seals catch. You should really spend some time reading through some of the turbo renesis builds. Many of the older threads where people played with the greddy kits have tons of tricks for a turbo renesis. Like the apv block off plate essentially making it a 4 port.
@@RADPotential making it a 4 port was because the greedy couldn't supply enough air at lower boost, so they made the intake restrictive to push the turbo in to the very edge of the compressor map to make it produce any air there.
2 Hybrids Running with RX7 rotors: if possible use hardened style side seals. Smooth out the intake port that you showed in the video. Ideally block the middle exhaust ports, it will reduce heat in those side seals, less overlap and allows you to run twin scroll turbo. Keep in mind running RX7 rotors, will cause overlap, so, don't add too much overlap via porting.
Super excited to see how things work out for you. A lot of talk and posts on the forums that say this isn't worth the effort (and in some cases less power), so looking forward to seeing your project progress.
If I’ve learned anything in my life it’s that forums are full of keyboard warriors and not people that turn wrenches. They will always say you can’t do something. All the coolest projects I’ve seen in person do not waste time on forums.
You could use those gslse housings with the renisis irons if you had a metal shop cut you strips of ideally similar quality aluminum and glue em into your housing grooves. Since it is aluminum it should be relatively easy to form it to the shaoe and you dont have to get a big ole cnc job done, and then fill in the exhaust port like you would with a full pp motor. This would atleast in my mind eliminate the potential for the same massive heat soak for the corner seals, and you can eliminate some of the guess work in fabricating an exhaymust manifold by just simply buying an exhast manifold that is designed to spool the turbo as efficiently as possible. My only drawback i can see from it is the fact that you want the renesis irons to lighten the workload to make it possible, and that means you have to stuck with the renesis rotors. One could also argue that you might as well just turbo that gslse motor and put it in instead. Although as far as keeping it simple and cost effective i do think just replacing the housings would be a massive improvement.
So, my opinion, do anything to avoid issues with the corner seal/side seal area. If that means RX8 rotors, I'd say have them machined/balanced to what they can take and throw them bigger seals in. It's likely that the compression ratio will be higher than you want compared to the GSLSE rotors but it'll likely be a solid runner and take a good amount of boost. You want to avoid a teardown even though it's probable. Godspeed my friend.
The research part could include speaking to Angel Motorsport who have also built a hybrid. There have been a few I have seen that have blocked the side exhaust ports which essentially just mimics every other rotary out there. I think keeping the six exhaust ports is the reason for building the hybrid. It comes with the issue of creating the exhaust manifold (my understanding is 5 outlet as the centre covers 2 exhaust ports) that is equal in length. The only rotors i have seen were the 1s done by Kyle Mohan and he used the machined RX8 with 3mm seals. I believe he did that in house. I am also thinking with the rx8 rotaries you are keeping most of the rest of the rotating assembly making it a bit cheaper to build eg same e shaft balancer, static gear, etc (maybe better bearings). I get the need for low compression rotors for boosting the motor, just unfortunate that the RX8 and GSLSE are the 2 highest compression. The other thing that intrigues me a bit is using a turbo or supercharger to get the boost, from what I have seen the renesis safety zone is 6 to 10lb boost. Now in my mind a supercharger runs at lower boost than a turbo but has the disadvantage of creating more heat in the process (the enemy of all rotarys) so not sure which is the best option. The supercharged rotaries I have seen had the upperhand in the torque department. Like everyone else I am fascinated with this type of build and really looking forward to what you achieve. 😊😊😊
The side seal location difference is for the rx8 exhaust ports to be open up a bit more they’re also ok with side exhaust ports, Have a look into Machining the rx8 rotors to fit the deeper rx7 apex seals so they’re happier with the p port exhaust ports and run rx8 side seals so they’re happy with the side port exhaust ports, all on rx8 rotors and machine off the bits required to avoid housing contact and also to lower comp. Keep up the rad content mate Legend!
I don't know quite what I'm talking about, but do whatever you need with the rotors to have the beefiest seals and rotor that would allow your low-compression setup, ditch the bridge port idea and go semi-P, for the intake instead, and long-term or on the next build consider ditching the shared exhaust port so you can do a proper twin-scroll setup, since I know you did 5 port exhaust on this and the yellow RX8.
This would be the first time I’m seeing the Renni play a part in a turbo build and to think that this could be a clean install with only a couple of new parts needed is exciting
I've heard someone making a peripheral port Hybrid renesis that was NA. It made roughly the same as an old EGI so this seems not only like a cheaper alternative to an REW swap but am easier one in terms of engine management and retaining factory mounting and powersteering. Super excited to see how this turns out.
If you use the p port the engine just wont be efficient with the intake port opening about 23 degrees earlier on the renesis, stalling your intake flow or flushing your air fuel down the exhaust. You can always make power by harvesting a little energy off a big fire, but excessive heat is bad. The key to power with renesis is to increase exhaust flow to reduce pressure building inside the port from forced induction while at the same time keeping the velocity of the exhaust high to lower the effects of heat on the exhaust walls. Just enlarging the port doesn't keep the exhaust velocity high, but shaping and enlarging the port does. This might require custom printed Inconel exhaust sleeves (with printed insulating voids) to match the new shaped ports? Also to help keep the heat off the irons, maybe ceramic coatings on the inside of the exhaust ports and on one side the housing exhaust sleeve. Regarding compression, it can be lowered by machining (triangular) slots behind the sparkplugs with a singular slot in front of the sparkplug to add volume and to also direct the spark's flame front down the combustion space like a ramjet - certainly the stratified distribution of the air fuel in a rotary can be used as an advantage. That's my two cents...
IMO cutting the rx8 rotors for 3mm apex seals would be the best. Can always just pull timing and run rich to avoid detonation from the high compression, risking a side seal dropping into a port sounds very sketchy. Super stoked you are building a hybrid motor!
Awesome , I was really considering a k swap for mine , but now you have me hope in maybe keeping it rotary , I’ll probably do the same after seeing how yours turns out
I'd do rx8 rotors and have them faced, scalloped, and machined for taller seals. I'd personally rather have a little more response, and if you want more boost just run e85
I'd stick with the Renesis in stock form with some modifications as you'll already have the engine out. Rebuild it with lightened rotating assembly (e-shaft, rotors, flywheel, flywheel nut, etc), street port the intake/exhaust, stock seals, load a JDM tune onto a Haltech and send it. The guys at Chips Motorsport, Petite, and Akins swear by the Renesis's capabilities. don't buy the expensive lightened assembly, simply have Cjips motorsport or Charles look into lightening the equipment you already have. Food for thought. Love the content!
so I saw a thread about this on facebook a few months ago, I really wanted to go this route the issue is that you can't really get that much juice compared to rew, you might as well just leave the renesis and boost that since they both fail at about 400hp and its less work to just boost the renesis but idk
I built a hybrid renesis and just used renesis rotors with bigger goopy apex seals. I wanted around 400whp and mazdatrix’s dyno graph of this engine made 436 with 100 octane race gas. Instead of race gas, I’m going to use methanol injection which is still much cheaper than running e85. I have about 500 miles on my engine with 8 psi and it runs well. I just need it tuned for power.
ive been thinking about building a hybrid renesis for a year now and a little bit ago a tuner told me its a waste of money and wont hit the power goals. I have alot of hope in rad man over here.
@@mattroux9994 its not negative advice simple because you don't like it. It is a true advice. KMR made an engine and made 400whp. Well you can make the SAME power with the stock renesis engine, stock ecu, maybe injectors and mild porting if you do what he also did to that engine, and that is studding the engine and having either taller rew apex seals (oem) or rx-8 stock like goopy.. There are few long used RX-8 builds with low mount turbo with 400whp - studded engine, rew apex (oem) and an instant spool - ie fool boost from 3000 til 8000 rpm. The KMR monstrosity barely spooled because the exhaust has to much area, meaning to slow exhaust flow. High mount turbo ect.. You say you don't have money for an REW swap. The exhaust on the KMR hybrid cost more than the full engine rebuild (being inconel wrapped ect) and it still didn't make great results otherwise he would have kept using it. Again, your tuner told you the correct thing. Keep it renesis.. you can turbo a STOCK block no porting or anything for 280-300 WHP (almost double the oem) and that requires only the turbo, intercooler and exhaust manifold.
Watching with interest. Brett Harper (Brettus) managed to get +400hp from a renny relatively reliably. Nobody has ever seen any benefits from going hybrid, or they get abducted and never heard from again. I would love to be proven wrong.
Don’t the Renesis rotos have an extra metallic oil control ring or “fire ring” to keep the hot exhaust gases from getting to the actual oil control rings? Maybe something g to think about?
Keep rx8 rotors and do water or water/meth injection with smart controller. I use just water and a pressure monitor that drops boost if I forget to top up the water.
So I also have a GSL-SE donor car for doing the hybrid stuff for the RX8 motor/trans I got for my AE86 hatch, and I also have some of the same concerns that you mention in relation to the rotors, and I suspect in regards to the lowering the compression of the rotors I'm just going to limit my boost on pump gas and go ham with the E85 (assuming I ever turbo it). I live on a small island in WA with no local access to E85, but until I have a spare RX8 rotor to slice up, I don't really feel like potentially limiting the amount of metal behind the rotor faces on something that could see a fair amount of its life heat soaked from track use. Those things are somewhat hollow if I recall correctly, aren't they?
I like the hybrid idea but i wish someone made a exhaust sleeve to block off the renesis exhaust port.That way with the exhaust just coming out the rx7 housing the turbo exhaust manifold would be very small & simple.Rx8's don't have alot of room on that side of the engine & even less if the car is RHD.
I love the 9:4:1 S4 NA rotors in my 6 port turbo it has such great power delivery paired with my EFR 7670, also had my rotors race clearanced too and engine has survived the abuse of drifting haha. If you can make S4/S5 rotors work right with machining that would be sick.
I’m building a hybrid renisis motor for my Mazda speed miata and I don’t have a power goal but I plan to run e85 and 10 to 15 lbs of boost at most have a few Questions Would 12a housings work? (I plan to put in solid dowels) Will I need race clearance rotors? Either way, what kinda horsepower do you see this engine making
Will you change the oiling? I believe a turbo setup requires more oil in the chambers, and is a huge question for me - how much? I mean if you go with the RX-8 housing, amd RX-8 rotors with the deeper seal beds, and the oiling stays the same, the seals would run hot, right?
I wouldn't mind having one of those Renesis iron/GLE housing hybrids in my RX-8. I would keep the Renesis rotors but upgrade the seals. I would try to get a supercharger, bigger secondary injectors, upgraded fuel pump, nitrous system, methanol mix, SOHN adapter with Klotz BeNol, LS coils, intake honeycomb, and Flash the ECU. Looking forward to these videos, I can't wait to see what you do next with the rotary. Any Idea where you will get the hybrid exhaust manifold? Thanks man!
Question why not use FD rotors and not worry about the scalloped at all? Andy don't have to get the Apex seal grooves cut deeper to run traditional Apex seals on the rx8 rotors?
So huge question rad. I have a 4 port msp. Will it be able to be turbocharged? I hear it’s not wise to do but I see you know well enough about rotaries that you’d know if it’s possible with building my own setup
You should try to get in touch with Kyle Mohan I know he’s built a couple of these renesis hybrid engines for race engines he may have some suggestions for you
There's is a lot of talk on RUclips about renesis hybrid builds but no one seems to cover the Fueling side of, it do you stay stock RX8 intake? Injector upgrade? ECU? What's best what are the options cheers thanks.
Bro wait till ya see my crazy weird wonderful renisis / gsl-se pp 8 port build for my street rx8 here in New Zealand. 8 intake ports 5 exhaust ports. Yes sir
Wrong. It is a major mistake to not disassemble and inspect each and every oil pump. Unbend the locking tab. Remove the oil pump driven gear nut. Remove the oil pump driven gear. Disassemble and inspect the oil pump. The rotors are almost entirely cooled by oil that is sprayed inside them. I don't remember the exact figure but if the oil falls to too low a value the rotors will overheat and warp.
Can't you run a dual fuel table on a Halltech 2500 using a GM ethanol sensor? Can you run different boost depending on the fuel it detects? Are you going to block off 2 of the OMP lines or combine the 4 lines in to 2? I think I would use the RX8 rotors. Have them machined for the 3mm seals and side clearance the tips. Does anyone offer a full keg studding service? If you have all the exhaust ports (some say too much), would supercharger be better than turbo?
I know this is not about the video but today i was with a group if friends i try to turn off the dsc for the first time i bought the car about 2 weeks ago and after few seconds keeping the DSC button the dsc off light and skid light never comes what could be wrong also there is no check lights or something like that lol
I’m so grateful for all the videos you post!!! It is so helpful and in depth! I just have a question, for anyone I guess, what makes it a “hybrid” like you said? I know this doesn’t relate to ev assist, but I’m new to rotaries so just curious! And you also said you would possibly flatten the corners of the rotors, what exactly does that allow the rotor to do a high power? Hit the housings without tearing anything up?
The hybrid is a combination of the Mazda RX8 renesis side and centre plates and a series 3 Mazda RX-7 13b gslse rotor housings. The theory is that having the additional exhaust ports improves performance so the motor goes from 4 exhaust ports to 6 port exhaust ports, so an equal number of inlet and exhaust ports. There have been a few hybrid builds but as Erich has said there is limited documentation of the process.
Wouldn’t shaving the side of the rotor increase the compression? Seems backwards from piston engines. More stroke, more total area, higher compression right? Could someone elaborate on this I’m very curious
Doooont do that. KMR did it and "aw so good" but no actual data just peak power... The exhaust is not in its optimal configuration that way! it has way to much area and evacuation is way to slow... look at the PP exhaust port size and it is enought for 400hp/rotor compared to a hybrid with all the exhuast area. To have a good hybrid you need the rx-8 EXh ports blocked off and no one has managed to do that properly so far.
in the youboob land of blind maroons, the one-eyed maroon is king just save yourself the time and effort by digging a hole, throwing all the many thousands of dollars you will spend on this into it instead, a gallon of gas too, and just light it off with a match. there were many of these hybrids built over the last 10+ years and there’s a reason the majority of them were hidden; nobody in this vain, shallow generation looking to brag about how great they were going to be for doing this across every social media platform wants to admit on there instead that is was a total disaster and complete financial loss. There’s no glory, praise, or admiration in that. Even the Mazdatrix end result was mediocre compared to what an REW can accomplish for less cost. That was a $12,000+ pro race engine build too, not including all the other custom costs to bring it all together in the chassis. Also not including all the money they spent getting it there from where it initially began quite pathetically several years prior either. You don’t know about all that any more than anything else about what you’re getting into here. I didn’t have to read the comments to know that you didn’t even bother doing the proper research first before deciding on this path. Just like you don’t know how thin Renesis rotor faces are, or that you never face any rotor for compression purposes but only in combustion pocket. Any more than why it’s a bad decision all around just on the detailed technical merits that the majority never even think about, let alone consider them logically. If you see this through it will be a very regrettable mistake, but if you’re willing to eat the cost of proving once and for all that most people don’t have as good of a technical grasp on the subject as they think they do, then by all means please knock it out of the park like a boss.
I know the goal is 400hp boosted how much would you speculate an NA version would make? I think Kyle mohan would be a good source to get in touch with. or mazdatrix according to him, theyve done it.(if you havent already) I think the hybrid has always been just a few things short of being a great option, but just enough that an REW is easier either way hope it comes to fruition
I've missed alot! But loving the challenge you've taken on man haha! I would honestly reach out to mohan/mazdatrix you've got good knowledge already so I'm sure they would actually entertain and pass on a cheeky secret or data to use to you that us diggers haven't found, P.s don't forget to balance the thing I think you missed that out your rant plans🫢 😂 all the best brother 💪
Said it before… saying it again. THANK YOU for taking the time to document your projects for OUR benefit Erich! You’re the definition of community! Yo, you gotta explain Jeffy for us. Did his owner move to Guam? And Leddy’s jealous expression in the background was priceless! You rock man!
I speak for every RX8 owner, we are patiently waiting for this build to start!!!!
I see hybrid renesis becoming more popular as more documented builds like this go around.
Being that there's really not a lot of information documented on these hybrid setups or building them, please document everything possible!!! I know it's a lot of work, but I hope not too much 😋
You're the best!
you know, its not often i enjoy watching an engine teardown video anymore, but i watched the whole damn thing even though i didnt even need to lol
I built one a few years ago. Used the S5 Turbo motor basically with the rx8 crank and timing cover. Made the rx8 intake fit on the s5 engine. And added boost. Ran a after market fuel system just as a piggy back for when in boost. Worked quite well. And i belive its still running
So cool. Between you and KMR so much good information coming out.
Rx8 rotors machined is the way to go. Several people have tried the older rotors and had their side/corner seals catch.
You should really spend some time reading through some of the turbo renesis builds. Many of the older threads where people played with the greddy kits have tons of tricks for a turbo renesis. Like the apv block off plate essentially making it a 4 port.
I have been reading a ton. this is just the start. do you have a link to those forum threads. or just rx8club?
@@RADPotential on the rx8 club, I can take a look and find links after work in a bit.
Ill dig deeper into it!! thank you so much for the direction!
@@RADPotential making it a 4 port was because the greedy couldn't supply enough air at lower boost, so they made the intake restrictive to push the turbo in to the very edge of the compressor map to make it produce any air there.
RAD P listening to polyphia is not what i expected lmao
RAD-P is a badass rap name
haha polyphia is the jam for getting work done!
Hell yea
2 Hybrids Running with RX7 rotors: if possible use hardened style side seals. Smooth out the intake port that you showed in the video. Ideally block the middle exhaust ports, it will reduce heat in those side seals, less overlap and allows you to run twin scroll turbo.
Keep in mind running RX7 rotors, will cause overlap, so, don't add too much overlap via porting.
You have links of these builds?
Sadly they are not on the internet. I might try to record it next time.
Super excited to see how things work out for you. A lot of talk and posts on the forums that say this isn't worth the effort (and in some cases less power), so looking forward to seeing your project progress.
If I’ve learned anything in my life it’s that forums are full of keyboard warriors and not people that turn wrenches. They will always say you can’t do something. All the coolest projects I’ve seen in person do not waste time on forums.
Thank you for keeping it rotary
I noticed that your shirt said "StL" on it... I'm in StL too. Its a small world. I think its great that there are so many StL car channels on YT.
You could use those gslse housings with the renisis irons if you had a metal shop cut you strips of ideally similar quality aluminum and glue em into your housing grooves. Since it is aluminum it should be relatively easy to form it to the shaoe and you dont have to get a big ole cnc job done, and then fill in the exhaust port like you would with a full pp motor. This would atleast in my mind eliminate the potential for the same massive heat soak for the corner seals, and you can eliminate some of the guess work in fabricating an exhaymust manifold by just simply buying an exhast manifold that is designed to spool the turbo as efficiently as possible. My only drawback i can see from it is the fact that you want the renesis irons to lighten the workload to make it possible, and that means you have to stuck with the renesis rotors. One could also argue that you might as well just turbo that gslse motor and put it in instead. Although as far as keeping it simple and cost effective i do think just replacing the housings would be a massive improvement.
I really like your videos. Can't wait to see this engine run when done.
So, my opinion, do anything to avoid issues with the corner seal/side seal area. If that means RX8 rotors, I'd say have them machined/balanced to what they can take and throw them bigger seals in. It's likely that the compression ratio will be higher than you want compared to the GSLSE rotors but it'll likely be a solid runner and take a good amount of boost. You want to avoid a teardown even though it's probable. Godspeed my friend.
The research part could include speaking to Angel Motorsport who have also built a hybrid. There have been a few I have seen that have blocked the side exhaust ports which essentially just mimics every other rotary out there. I think keeping the six exhaust ports is the reason for building the hybrid. It comes with the issue of creating the exhaust manifold (my understanding is 5 outlet as the centre covers 2 exhaust ports) that is equal in length.
The only rotors i have seen were the 1s done by Kyle Mohan and he used the machined RX8 with 3mm seals. I believe he did that in house. I am also thinking with the rx8 rotaries you are keeping most of the rest of the rotating assembly making it a bit cheaper to build eg same e shaft balancer, static gear, etc (maybe better bearings). I get the need for low compression rotors for boosting the motor, just unfortunate that the RX8 and GSLSE are the 2 highest compression.
The other thing that intrigues me a bit is using a turbo or supercharger to get the boost, from what I have seen the renesis safety zone is 6 to 10lb boost. Now in my mind a supercharger runs at lower boost than a turbo but has the disadvantage of creating more heat in the process (the enemy of all rotarys) so not sure which is the best option. The supercharged rotaries I have seen had the upperhand in the torque department.
Like everyone else I am fascinated with this type of build and really looking forward to what you achieve. 😊😊😊
The side seal location difference is for the rx8 exhaust ports to be open up a bit more they’re also ok with side exhaust ports,
Have a look into Machining the rx8 rotors to fit the deeper rx7 apex seals so they’re happier with the p port exhaust ports and run rx8 side seals so they’re happy with the side port exhaust ports, all on rx8 rotors and machine off the bits required to avoid housing contact and also to lower comp.
Keep up the rad content mate
Legend!
I don't know quite what I'm talking about, but do whatever you need with the rotors to have the beefiest seals and rotor that would allow your low-compression setup, ditch the bridge port idea and go semi-P, for the intake instead, and long-term or on the next build consider ditching the shared exhaust port so you can do a proper twin-scroll setup, since I know you did 5 port exhaust on this and the yellow RX8.
We are waiting more videos bro
This would be the first time I’m seeing the Renni play a part in a turbo build and to think that this could be a clean install with only a couple of new parts needed is exciting
This the same hybrid that kmr has done?
Its renesis stuff with 12a irons for pp exhaust ports.
Need more exhaust mani for it
I've heard someone making a peripheral port Hybrid renesis that was NA. It made roughly the same as an old EGI so this seems not only like a cheaper alternative to an REW swap but am easier one in terms of engine management and retaining factory mounting and powersteering.
Super excited to see how this turns out.
If you use the p port the engine just wont be efficient with the intake port opening about 23 degrees earlier on the renesis, stalling your intake flow or flushing your air fuel down the exhaust. You can always make power by harvesting a little energy off a big fire, but excessive heat is bad. The key to power with renesis is to increase exhaust flow to reduce pressure building inside the port from forced induction while at the same time keeping the velocity of the exhaust high to lower the effects of heat on the exhaust walls. Just enlarging the port doesn't keep the exhaust velocity high, but shaping and enlarging the port does. This might require custom printed Inconel exhaust sleeves (with printed insulating voids) to match the new shaped ports? Also to help keep the heat off the irons, maybe ceramic coatings on the inside of the exhaust ports and on one side the housing exhaust sleeve.
Regarding compression, it can be lowered by machining (triangular) slots behind the sparkplugs with a singular slot in front of the sparkplug to add volume and to also direct the spark's flame front down the combustion space like a ramjet - certainly the stratified distribution of the air fuel in a rotary can be used as an advantage. That's my two cents...
IMO cutting the rx8 rotors for 3mm apex seals would be the best. Can always just pull timing and run rich to avoid detonation from the high compression, risking a side seal dropping into a port sounds very sketchy. Super stoked you are building a hybrid motor!
Awesome , I was really considering a k swap for mine , but now you have me hope in maybe keeping it rotary , I’ll probably do the same after seeing how yours turns out
keeep it rotary broooooo
@@joogullae3456 i might, ill try this hybrid build when its time for rebuild.
I'd do rx8 rotors and have them faced, scalloped, and machined for taller seals. I'd personally rather have a little more response, and if you want more boost just run e85
e30 is actually more than enough. e30 has 90+% of the e85 which is very difficult to use. even for E30 you need alcohol specific premix oil ect...
you can also run water methanol injection to run the rx8 rotors on pump gas
This should be a good hybrid build. Make allot of content of the whole build
I'd stick with the Renesis in stock form with some modifications as you'll already have the engine out. Rebuild it with lightened rotating assembly (e-shaft, rotors, flywheel, flywheel nut, etc), street port the intake/exhaust, stock seals, load a JDM tune onto a Haltech and send it. The guys at Chips Motorsport, Petite, and Akins swear by the Renesis's capabilities. don't buy the expensive lightened assembly, simply have Cjips motorsport or Charles look into lightening the equipment you already have. Food for thought. Love the content!
so I saw a thread about this on facebook a few months ago, I really wanted to go this route the issue is that you can't really get that much juice compared to rew, you might as well just leave the renesis and boost that since they both fail at about 400hp and its less work to just boost the renesis but idk
I built a hybrid renesis and just used renesis rotors with bigger goopy apex seals. I wanted around 400whp and mazdatrix’s dyno graph of this engine made 436 with 100 octane race gas. Instead of race gas, I’m going to use methanol injection which is still much cheaper than running e85. I have about 500 miles on my engine with 8 psi and it runs well. I just need it tuned for power.
Why not make a video of yoir hybrid build
Lots of people love the S4 rotors for boost but then you have to have it balanced. Fd rotors you dont have to balance.
With a hybrid renesis you do need to modify the rx8 engine mount, the one that would mount on the oem header
By the way. I love all of your cars. Let’s see more of the rotary truck
ive been thinking about building a hybrid renesis for a year now and a little bit ago a tuner told me its a waste of money and wont hit the power goals. I have alot of hope in rad man over here.
yur tuner has told you some facts without hidden agenda to sell you something like KMR
@Milos Balunovic yeah I understand but I can't afford an rew rn so why give someone negative advice
@@mattroux9994 its not negative advice simple because you don't like it. It is a true advice.
KMR made an engine and made 400whp.
Well you can make the SAME power with the stock renesis engine, stock ecu, maybe injectors and mild porting if you do what he also did to that engine, and that is studding the engine and having either taller rew apex seals (oem) or rx-8 stock like goopy..
There are few long used RX-8 builds with low mount turbo with 400whp - studded engine, rew apex (oem) and an instant spool - ie fool boost from 3000 til 8000 rpm.
The KMR monstrosity barely spooled because the exhaust has to much area, meaning to slow exhaust flow. High mount turbo ect..
You say you don't have money for an REW swap. The exhaust on the KMR hybrid cost more than the full engine rebuild (being inconel wrapped ect) and it still didn't make great results otherwise he would have kept using it.
Again, your tuner told you the correct thing. Keep it renesis.. you can turbo a STOCK block no porting or anything for 280-300 WHP (almost double the oem) and that requires only the turbo, intercooler and exhaust manifold.
so excited for this
Watching with interest. Brett Harper (Brettus) managed to get +400hp from a renny relatively reliably. Nobody has ever seen any benefits from going hybrid, or they get abducted and never heard from again. I would love to be proven wrong.
Don’t the Renesis rotos have an extra metallic oil control ring or “fire ring” to keep the hot exhaust gases from getting to the actual oil control rings? Maybe something g to think about?
Yes they do!
Keep rx8 rotors and do water or water/meth injection with smart controller. I use just water and a pressure monitor that drops boost if I forget to top up the water.
I hear some tim hensom playing in the background 😂
So I also have a GSL-SE donor car for doing the hybrid stuff for the RX8 motor/trans I got for my AE86 hatch, and I also have some of the same concerns that you mention in relation to the rotors, and I suspect in regards to the lowering the compression of the rotors I'm just going to limit my boost on pump gas and go ham with the E85 (assuming I ever turbo it). I live on a small island in WA with no local access to E85, but until I have a spare RX8 rotor to slice up, I don't really feel like potentially limiting the amount of metal behind the rotor faces on something that could see a fair amount of its life heat soaked from track use. Those things are somewhat hollow if I recall correctly, aren't they?
Get the RX8 rotors machines for the 3mm apex seals. That's what I would do.
I like the hybrid idea but i wish someone made a exhaust sleeve to block off the renesis exhaust port.That way with the exhaust just coming out the rx7 housing the turbo exhaust manifold would be very small & simple.Rx8's don't have alot of room on that side of the engine & even less if the car is RHD.
I love the 9:4:1 S4 NA rotors in my 6 port turbo it has such great power delivery paired with my EFR 7670, also had my rotors race clearanced too and engine has survived the abuse of drifting haha. If you can make S4/S5 rotors work right with machining that would be sick.
I've heard the FD rotors work well with the RX8 e shaft and gears.
Im sad about your dents 😢
Hi Mate love your videos George from Sydney Australia
Logan with Defined auto in Columbus Ohio does rotor machine work and may be able to help. His work is top notch.
Ayo, he's got polyphia playing in the background
Get ahold of angels Motorsports in North Carolina!!!!!! Those guys know everything about it and they can do all your machine working for you!!!
Following I’m planning on doing the same build on my 04 Rx8, any idea where I can get the older rx7 housings?
get your rx8 rotors machined to accept fd apex seals and in large all of the pockets in them then get your rotating assembly balanced
I’m building a hybrid renisis motor for my Mazda speed miata and I don’t have a power goal but I plan to run e85 and 10 to 15 lbs of boost at most
have a few Questions
Would 12a housings work? (I plan to put in solid dowels)
Will I need race clearance rotors?
Either way, what kinda horsepower do you see this engine making
Will you change the oiling? I believe a turbo setup requires more oil in the chambers, and is a huge question for me - how much? I mean if you go with the RX-8 housing, amd RX-8 rotors with the deeper seal beds, and the oiling stays the same, the seals would run hot, right?
Oiling as in the squirters inside the rotors? or Oiling with regard to the OMP and Premix?
@@RADPotential Yeah, I meant if you change the squirters or make a premix.
RTV, Loads of RTV
I wouldn't mind having one of those Renesis iron/GLE housing hybrids in my RX-8. I would keep the Renesis rotors but upgrade the seals. I would try to get a supercharger, bigger secondary injectors, upgraded fuel pump, nitrous system, methanol mix, SOHN adapter with Klotz BeNol, LS coils, intake honeycomb, and Flash the ECU. Looking forward to these videos, I can't wait to see what you do next with the rotary. Any Idea where you will get the hybrid exhaust manifold? Thanks man!
I will build the hybrid exhaust manifold
Question why not use FD rotors and not worry about the scalloped at all? Andy don't have to get the Apex seal grooves cut deeper to run traditional Apex seals on the rx8 rotors?
I've heard r e w rotors work well with the RX8 East shaft and gears then you don't have to worry about scalps
So huge question rad. I have a 4 port msp. Will it be able to be turbocharged? I hear it’s not wise to do but I see you know well enough about rotaries that you’d know if it’s possible with building my own setup
bro do you live in georgia??? i was thinking about ebay turboing my rx8 and just keep it low boost.
You should try to get in touch with Kyle Mohan I know he’s built a couple of these renesis hybrid engines for race engines he may have some suggestions for you
There's is a lot of talk on RUclips about renesis hybrid builds but no one seems to cover the Fueling side of, it do you stay stock RX8 intake? Injector upgrade? ECU? What's best what are the options cheers thanks.
My plan is stay stock intake. Haltech elite 2500. Bigger fuel pump etc
I would love to see a semi-pp rx8 gsl-se hybrid.
Bro wait till ya see my crazy weird wonderful renisis / gsl-se pp 8 port build for my street rx8 here in New Zealand. 8 intake ports 5 exhaust ports. Yes sir
You got a build thread you can link?
Paused at 11:50
Did you find solid corner seals?
Wrong. It is a major mistake to not disassemble and inspect each and every oil pump. Unbend the locking tab. Remove the oil pump driven gear nut. Remove the oil pump driven gear. Disassemble and inspect the oil pump. The rotors are almost entirely cooled by oil that is sprayed inside them. I don't remember the exact figure but if the oil falls to too low a value the rotors will overheat and warp.
How can I get In contact with you . I am thinking about porting my 91 rx7 corvereble is all stock thanks in advance?
Can't you run a dual fuel table on a Halltech 2500 using a GM ethanol sensor?
Can you run different boost depending on the fuel it detects?
Are you going to block off 2 of the OMP lines or combine the 4 lines in to 2?
I think I would use the RX8 rotors. Have them machined for the 3mm seals and side clearance the tips.
Does anyone offer a full keg studding service?
If you have all the exhaust ports (some say too much), would supercharger be better than turbo?
I know this is not about the video but today i was with a group if friends i try to turn off the dsc for the first time i bought the car about 2 weeks ago and after few seconds keeping the DSC button the dsc off light and skid light never comes what could be wrong also there is no check lights or something like that lol
Hey man, do you have a 4 rotor project in mind ?
Yes!!!!!!! This is soo sick!
scallop the rx8 rotors for lower compression maybe?
everyone just build with turbo. I want to see a high rev NA build for a change.
I’m so grateful for all the videos you post!!! It is so helpful and in depth! I just have a question, for anyone I guess, what makes it a “hybrid” like you said? I know this doesn’t relate to ev assist, but I’m new to rotaries so just curious! And you also said you would possibly flatten the corners of the rotors, what exactly does that allow the rotor to do a high power? Hit the housings without tearing anything up?
Edit, I meant hit the irons without tearing anything up?
The hybrid is a combination of the Mazda RX8 renesis side and centre plates and a series 3 Mazda RX-7 13b gslse rotor housings. The theory is that having the additional exhaust ports improves performance so the motor goes from 4 exhaust ports to 6 port exhaust ports, so an equal number of inlet and exhaust ports. There have been a few hybrid builds but as Erich has said there is limited documentation of the process.
@@ADudesRotary awesome ok!
Wouldn’t shaving the side of the rotor increase the compression? Seems backwards from piston engines. More stroke, more total area, higher compression right?
Could someone elaborate on this I’m very curious
stroke is fixed and doesn't change. it's just like taking material from a piston top. displacement stays the same but lowers compression.
@@whyshouldipickaname ah right okay thank you
I say send it!
Don't trick your doggie 🤥😥🙏🤗...I would like to do this swap to old style exhaust exit ,so less heat....it's this heat that kills rx8's
you talk and im not sure what your saying but if you finish it and i see it. i will understand.
deepen the pockets what s the problem here
Doooont do that.
KMR did it and "aw so good" but no actual data just peak power...
The exhaust is not in its optimal configuration that way! it has way to much area and evacuation is way to slow... look at the PP exhaust port size and it is enought for 400hp/rotor compared to a hybrid with all the exhuast area.
To have a good hybrid you need the rx-8 EXh ports blocked off and no one has managed to do that properly so far.
in the youboob land of blind maroons, the one-eyed maroon is king
just save yourself the time and effort by digging a hole, throwing all the many thousands of dollars you will spend on this into it instead, a gallon of gas too, and just light it off with a match.
there were many of these hybrids built over the last 10+ years and there’s a reason the majority of them were hidden; nobody in this vain, shallow generation looking to brag about how great they were going to be for doing this across every social media platform wants to admit on there instead that is was a total disaster and complete financial loss. There’s no glory, praise, or admiration in that.
Even the Mazdatrix end result was mediocre compared to what an REW can accomplish for less cost. That was a $12,000+ pro race engine build too, not including all the other custom costs to bring it all together in the chassis. Also not including all the money they spent getting it there from where it initially began quite pathetically several years prior either.
You don’t know about all that any more than anything else about what you’re getting into here. I didn’t have to read the comments to know that you didn’t even bother doing the proper research first before deciding on this path. Just like you don’t know how thin Renesis rotor faces are, or that you never face any rotor for compression purposes but only in combustion pocket. Any more than why it’s a bad decision all around just on the detailed technical merits that the majority never even think about, let alone consider them logically.
If you see this through it will be a very regrettable mistake, but if you’re willing to eat the cost of proving once and for all that most people don’t have as good of a technical grasp on the subject as they think they do, then by all means please knock it out of the park like a boss.
I know the goal is 400hp boosted
how much would you speculate an NA version would make?
I think Kyle mohan would be a good source to get in touch with. or mazdatrix according to him, theyve done it.(if you havent already)
I think the hybrid has always been just a few things short of being a great option, but just enough that an REW is easier
either way hope it comes to fruition
Mazdatrix had a turbo Reni+SE hybrid in their RX8 racecar a decade ago. Made 400hp relatively conservatively from my memory
@kylemohanracing watch from 20min and on
I've missed alot! But loving the challenge you've taken on man haha! I would honestly reach out to mohan/mazdatrix you've got good knowledge already so I'm sure they would actually entertain and pass on a cheeky secret or data to use to you that us diggers haven't found,
P.s don't forget to balance the thing I think you missed that out your rant plans🫢 😂 all the best brother 💪
I will reach out. Great people!!
yea balancing is a given when doing scallops, face cut, side cuts etc.