Hey all, just spoke to Rohan @ Xtreme rotary about the application of the SOHN adapter.

He thinks its a good idea for a NA RX8. Now what he is questioning is how will this SOHN adapter work in a boosted application. According to mazda and MM's post https://www.rx8club.com/showthread.p...&highlight=omp

It states that oil gets injected under pressure from the engine oil pump. This all good when the engine is under vacuum or atmso level. But what happens when the engine is in a boosted state? With the SOHN not receiving the pressure from the factory engine oil pump, and being gravity fed, wouldnt the boosted air effectively push the oil out?

He is going to investigate this issue by pulling apart a OMP and conducting a few tests on it with the SOHN Adapter, but does anyone have any idea behind this? I have noticed many people running it on a boosted application E.G MM.

Also to add in if the OMP is a low pressure pump, wouldnt the boost simply completely negate the amount of pressure being fed in, if gravity fed?


Regards
Jason

 

Nice... Keep us posted...

If possible... Id like to purchase the sohn adapter with the custom tank straight from him if has done the R & D...

 

Any updates Jason?

 

I just saw a diagram in the RX8 parts catalog that showed that a gear turns a rod with a slot where the OMP tab(the tab that goes into the engine) fits. I assume that this gear turns said rod and tab to operate the pump. If that's the case the Engine Oil Pump doesn't do much in regards to how fast the oil is fed to the pump. Hope this helps and if i'm wrong I would like to know.

 

I agree, I do not think much pressure is required

 

no real pressure on the s1 omp. Again i will say the oil is NOT injected under pressure. The oil just forms a drop at the hole of the rotary housing. The rotor sweeps by this drop and wipes the oil off.
Thats all there is to it. The rate of the oil supply changes according to load and rpm.
Now the s2 omp got it right--it has some pressure and the oil nozzles themselves have directional focus. Much better system.

 

OD, how much research have you done into the control of the s2 unit? Is there any way to modify it and run it on a s1 ECU? are the injectors different?

thanks

 

Not possible realistically. Just look at the S2 setup.

 

it would not be feasible. you would need a different oil supply site, different computer( the s1 would not work period) and the entire omp system plus drilling your rotor housings for the 3nd oil nozzle. i probably left some things out too.
heck you cant even put an s2 ENGINE into the s1 chassis without a lot of mods.