is anyone running JRSCs on their internally modified engine?, primarily CAMS?. Is there a power gain or loss.

 

move over to the FI forum.

but to answer your question (without having had a JRSC, just doing heaps of research)...

with FI, you have air being forced into the engine, with different cams (and even the stock VTEC cams) you have high overlap, especially in the upper RPMs, you will have a lot of flow just going across from intake to exhaust and not even entering the combustion chamber.

that is why, with most turbo applications that you see them using non-vtec.

it is possible to use FI with VTEC, and even with hi perf cams, but you will not see your potential being met on the high end.

one option is to just unplug VTEC.

 

GSR cams are the best for FI, internal will help like forged piston, etc. but high compression and JRSC are not good friends. The secret to the JRSC power all comes down to ECU and tunning. recommend a standlone for any FI cars. Cam gears helps, but with all that torque you better have a LSD and nice suspension setup to put all the power down on the ground.

 

if you want to do any internal work the only thing that I would recommend for your setup would be an ITR exaust cam. unles you're planning on really going on high boost you'll want to take care of those internals.

 

Exactly...ITR exhaust cam has been shown to improve power through the rpm range a bit...maybe 5-8whp when tuned. Not really worth it IMO.

And JRSC + High compression = BEST friends when tuned. Since the JRSC is boost limited, you gotta squeeze as much power out of each PSI as possible. High compression is the way to go. (Reasonably high)

 

u had a JRSC before...when did u get rid of it?

 

https://honda-tech.com/zerothread?id=685889

 

thanks