i installed both of them and they both look awsome but when i am at WOT it doesnt seem to accelerate smoothly, kinda choppy but not noticable to any one but me, granted it feels alot faster but not exactly smooth, any comments would be greatly appreciated. i also feel as if my car is getting slower but i let my dad drive it and it didnt fell slow when i was the passenger, is that weird.

 

i have only done one launch in the car so i hope it is not the clutch, i am also going to change the oil tomorrow, i have 3200 miles on it. and have had it since april, this will be the evos first oil change.

 

Not that it makes a difference now... but most people prefer to do the 1st oil change between 1-2K miles because everything is breaking in.... and it never hurts to have clean fluids. try to take care of your tranny fluid before 5K, and diffs beteen 5-10K... NOT claiming this is mandetory... but it can't hurt... especially if you get on it allot (like me).

 

Making a big change, like a new low backpressure exhaust, is going to have an impact on other areas, like how the turbo spools and the A/F ratios is various parts of the rpm band. You probably need to get some tuning. If you disconnected you battery during the install (like you should), it will take some time to retrain itself. It may have already been in the process of relearning by the time you rode as a passenger, which would explain why it felt better. This would happen to a certain extent even if you didn't disconnect the battery.

 

Definitely disconnect the battery. Need to reset ECU.

 

well i had to reset the ecu to install the o2 simulator. So that couldnt be it and i reset the ecu like three time after the install but i just got back from getting the oil and my car seems to not go fast, but by the time i look at the speedo i am doing 80 and i dont even realize it, and a couple nights ago i raced a viper and hung for quite a while but the he started to pull so maybe i am just getting used to it, but i think it still feels slow, time for a stroker kit. HEHE

 

hehe, time to recalibrate your butt dyno. drive something slow for a day or two, then get back in the EVO..............