de-cat pipes

[ste]

anyways as some of you no my car has a ok spec and was mapped at 1.1bar and got 476.3bhp at the fly wheel but while gettin alignment done yesterday i noticed car was still runnin factory cat... i not mechanically minded at all and my mapper never told me i still had standard cat so by fittin a decat will it improve the car much???? and also will it rduce my turbo lag??? i am runnin apexi rx-6 top mount turbo and full boost is at bout 4700rpm so as ya can imagine the lag is very annoying

any help appreciated

[Greg]

The less retrictions the exhaust gasses have to pass through the better. The turbo should boost earlier, and harder with that gone. Well that's if there is a restrictor in the cat like there was on my Chaser.

[ste]

but even by lookin at pipes the cat pipe is so much smaller

[Greg]

Get one so. Expect a a noise increase too.

[ste]

ill be fuckin deaf lol

[colm]

are you still running a lamba?

The lack of restriction in the exhaust with a de-cat can help you get on boost that bit quicker and might mean your map isnt giving the fuel needed in the right places any more, so keep a slight re-map in mind when you go about doing it