shutterbug

Have you done intake and exhaust?  If not, do intake first.

shutterbug

Intake doesn't do much at low rpm.  It mainly gains in mid to high.

I'm not sure how restrictive is the stock TSX exhaust but it could be the bottlenect after you installed your cat.  It's better to do them both at once anyway.  Might just do the header as well at the same time   I think with stock exhuast, the new car could just be slightly louder that's all.  Check engine light?  It depends if the cat is as efficient as the stock one, if not it might pop a code.

shutterbug

For $300 I'll reflash the ECU to get a smoother curve in the mid range.

shutterbug

That's US$519 + 2 ways of shipping, and not much gain for my year :S
ACC-HE 發表於 2009-12-9 15:02

reflashing is not for gains, it's for smoother power band and more useable power in mid range.  It's good for daily driving.  I think that's more important than gaining just a few hp at the most with a cat.

If you lose too much backpressure, your off the line low end acceleration is going to hurt a bit which is stupid because we drive in that range most of the time.

shutterbug

Cat is not risk la...if it triggers engine code it will probably be your secondary O2 sensor which you can pretty much ignore if there's no AirCare.  I think that O2 just measures the cat efficiency; main input for air-fuel should be the primary O2.

shutterbug

Actually I forgot, you can't ignore secondary o2 code because even that will put the car in limp in mode which hurts performance.

CP, I haven't touched cars for ages la. If no AirCare then just run straight pipe no cat la...haha but again not enough backpressure will harm low end.

shutterbug

yes BarF1 is right, open loop is what I meant.

shutterbug

$300 is not expensive la...call up Acura and see how much they quote you on a stock cat!