steviecrump

I have just fitted an uppipe to MY96 sti v2 and have devolped a backfire on boost at about 5000rpm? It does not seem to lose power but I get some bangs...

djandyg

iTrader: (2)

is it a decat pipe? Have you had it mapped yet?

If its a decat and it its not yet mapped i would avoid driving it on boost til its been mapped...

Wagon wheel eater

I get bangs on and off all the time! just thought it was scooby big bore exhaust nature.... its not at a certain rev and not all the time... floor it after driving gently for a while and it tends to happen off throttle as i change gear quickly? 1st gear generally but sounds awesome drives awesome ? decat I think ? more info please ...
turbo sport wagon my97... Ive got an uprated forged engine recently professionally rebuilt , standard ecu I think?

steviecrump

Yeah it is much the same as that, I just wondered if its normal with a decat??

my94wrx

iTrader: (4)

it would only be a decat as the car is a classic, only newage wrx's had the catted up-pipe.

my94wrx

iTrader: (4)

is it large bore bling bling ebay special?

steviecrump

No its a H+S slipjoint one not a large bore. As you say it is not a decat on a classic just the down pipe.

my94wrx

iTrader: (4)

when i had a h&s up-pipe it was 52mm and the standard one is 42mm unless h&s have changed the design then its a large bore up pipe you have.

neil1980

iTrader: (2)

mine had a cat in the down pipe.

BLACK V5

All classics had a cat in the downpipe. Not up pipe.

steviecrump

Just took the dump valve off,its like a different car!!!