Hi There,I have an 2000 s2k and ı bought a mugen headers,Mugen Thermostat,Mufen Fan Switch a week ago,and when ı put that parts to my engine my car gets slower than the stock one,ı also controlled the mugen headers a lot of service they also say'' this put correctly,and thats not a problem'' before the mugen headers when ı try my friends stock s2k, my s2k ıs appromixately 2 m faster than the stock ones but now wıth mugen headers my car ıs slower app. 2m than the stock ones (Our Tests are 100km/h - 200 km/h) can ı put my stock headers to get my car`s old performance back? And The second problem ıs my car`s springs, I bought an ap racing 4 cm lowered springs and the rear wheels looks like ''V'', becouse ı havent got a camber kıt,ıs thıs makes my car slow? thanks for your answers and please apologize me for my bad english...

 

Regarding the springs and lowering, you need to go to an alignment shop and get the vehicle re-aligned. They will be able to adjust camber. Go to one with quality and precision equipment, here in America the Hunter DSP series is good stuff.

The Mugen items you mentioned should not make the car noticeably slower or faster in the kind of test you mentioned. They are designed to work as a system with the Mugen ECU, exhaust, intake, etc. and even then the performance increase will be a more powerful midrange which may not be reflected in the type of test you do.

 

thanks chıung