Any ideas what kinda gains could be gained from this? Lets say with jdm header and cat, comptech icebox and apexi n1 exhaust. Could you expect similar gains? Or is the mugen high compression gasket needed to help gains? Thanks

 

You need stiffer valvesprings to utilize the higher redline (9100 rpm) - everything else should work. The HG is not necessary.

 

I had JDM header/test pipe
AEM
cam gears
and pulley set
I only lost midrange power but you're welcome to try.

 

My setup -

Mugen ECU
JDM 4-1 header
test pipe w/o muffler
K&N filter
fuel riser set up 58psi
stock valve springs

188whp 133tq

14+ track days since the ECU was installed and still running strong.

 

Don't really need stiffer springs for 9100 (although its the safe way to go) I rev up to 9500 on stock springs...don't do it everyday though..

 

I'd say the Mugen ECU was mapped for specific mods on the car at the time of the design. Say, Mugen extractors, Mugen valve springs, Mugen Intake, Mugen Exhaust + 100RON or higher etc...

like a Power chip, it's only best suited with the same mods it was tunned for, then again, every single car is different. I'd say go with a full programmable ECU like Apexi Power FC, MoTec, Autronics etc..

 

With an 2.5" mandrel exhaust, intake, and header is there power above 7800RPM?

Have you guys dynoed the cars to prove the fact.

My stock car stops making power at about 7800 RPM.

I just want to know if there is reason to raise the rev limiter since, raising the revs is taxing the motor.

 

One reason to shift at higher revs (even if the power is starting to drop off) is to bring you deeper into the power band when you go into the next gear. Purhaps this is what Mugen had in mind?

 

Your right, with stock cams the main reason for raising the limiter is for road-race applications that the ECU was designed for. Depending on the track and your driving style there will be times when holding the gear for and extra 300,400,500 rpm more instead of shifting and then haveing to brake for a corning is a faster way around the track. The power does peak and start to drop after 8000ish with the stock cams.

Mattj