I have an evo 9 rs and am looking to make it a little faster without hurting spool up or the low end power. The car has Bushur Racings full turbo back with no cat and Engine Ecu reprogram to correct the air/fuel ratio through out the rpm range and make proper adjustments for the exhaust upgrade, Reprogram performed by Al at DynoFlash. I also have a new o2 housing that has not been installed yet.

I just want a little more out of the car without changing the turbo. The car is being used for auto x / road course.

Let me know what you think. Thanks.

 

Lower Intercooler Pipe + Ported Throttle Body = breathing better with no loss of response!

 

Nothing will hurt low end unless you upgrade to a bigger turbo. About the only negative effect to spool and low-end torque would be high duration cams or maybe a huge FMIC. All the regular mods will IMPROVE spool and low-end torque as well as power through the whole band.

You need an MBC first...