Hybrid Rx-8 Build

[@gamemeister2239]

Here from the rebuilders group. Hope it works for you bro!

[@arcrotaryengineering7156]

You finally dyno?..save your money it'll make less than stock makes at its peak..unless you wanted old school braps..then that's the goal..😊done heaps, almost every configuration trying to yield power n/a..4,5 port exhaust, 6 port semi pp, half bridge, full bridge..nothing.did a half bridge, just blocked renesis exhausts.at exit and it instantly made more power..

[@theTIR3guy]

Did you run rx7 seals? Any issues with side seal catching carbon from block off exhaust?

[@spoonsarefun]

Planning on doing the same, which rotors and apex seals did you go with? Deeper?

[@badoasis3588]

Had them cut for rx-7 apex seals

[@spoonsarefun]

​@@badoasis3588 had some new theories for my build. The brand new Mazda rotary used in mx30 has 2.5mm thick apex seals, Mazda used thicker ones as they say it will last much longer... they also came out and said why the rx7/rx8 has flawed motor and uses so much fuel... it likes to collect mostly at the leading rotor tip and before full combustion a lot is sent right out the exhaust... my theory is that dimpled rx8 rotor or even partial dimple near apex may turbulate the air more and thus mix with fuel more and get more bang bang for buck... this idea is being used recently in diesel engines and has been used in gas engines before with benefits realized. Also I've thought about a hybrid exhaust split manifold to separate the rx8 exhaust ports from rx7 and perhaps using a valve that can be opened when a certain rpm is hit to avoid the exhaust gases jumping across rotors

[@Jonielzx]

Currently making this to my 8

[@spoonsarefun]

For the sohn (soan) pump did you look into if it needs both to operate proper? (4 total)

[@badoasis3588]

So actually forgot to mention is doesn’t use all 4 lines. The rx-7 housings only have 1 on each. So that’s why I plugged the other 2 lines and why I still plan on premixing.

[@badoasis3588]

But not really sure so I’m just hoping it does and if doesn’t I will let you guys know

[@spoonsarefun]

​@@badoasis3588 yeah it'd need both, best to just eliminate and go premix, imo. If you mix yourself you save the need for oil injection and unlock the ability to run synthetic oils. You cant run synthetic normally as it uses the oil as rotor lube. Premix will also provide cleaner chambers for longer in theory as 2 stroke oil is meant to burn off.

[@Carboniotecable]

Hi, will you it turbo or leave it na?

[@badoasis3588]

I want to see how much HP she puts out NA before I turbo it but will be putting out a video soon on the engine being dropped in there and hopefully running smooth.

[@spoonsarefun]

So... have been doing a lot of reading and research after... doesn't look like hybrid has legs... the port timing will be totally off and the car will struggle to produce power

[@badoasis3588]

That’s why I believe you’ll have to have a after market ecu to correct that

[@badoasis3588]

But that’s why I’m here for lol spending money so you don’t have to!!! 😂

[@spoonsarefun]

Only hope is turbo...and even then it will have no torque

[@badoasis3588]

@@spoonsarefun I wouldn’t say that I actually started this build because of Kyle mohan racing they turbo there’s and used it as a drift car so I wouldn’t say that it wouldn’t have any power or toque when it was one of there best engines for there cars. Watch there videos I think they pushed over 500 horsepower.

[@spoonsarefun]

@badoasis3588 I was convinced by the same... his old dyno charts kinda tell the tale as well... no HP or low end torque, once boosted it put up low numbers vs a 13b rew and the durability/reliability will be substantially less... if you look at rx8 forums and look for a grumpy guss named TeamRX8 he has spent months disproving it and showing why it won't work and goes through the mechanics as to why it doesn't work and comparing port timings. Kyle Mohan was brought up by myself and others who wanted to believe in the hybrid.... but all points point to it being a dud.... this may explain why KMR also keeps dragging it out for years... note that his motor is a totally shop built spec'd balanced block...not a garagigans weekend project... and how longs it been and still not so much as some dyno numbers???? Either kmr shop works suuuuuper slow... or he's dragging it out for click bait content from a bunch of fanboys like us who wish/hope so badly for it to work....

[@Ambuila75]

Man… you know nothing of rotary’s. Good luck