STi V4 - say 280bhp on optimax + millers - what kind of power gains can be got from the full decat & suitable backbox?

Also have you got power plots / graphs to show any stats?

Cheers

 

I think if you look on the dyno scoobies link at the top of the page you should be able to find comparable charts.

I don't believe that the power gains themselves are huge, approx 30bhp at the most. But drivability is increased immensly (though so is noise . Where your scoob feels quite gutless below 3,000 rpm at the mo, when decatted that feeling goes and gives a much smoother power delivery from no revs through when the turbo kicks in.

 

Cheers, have checked out a few graphs so far but fancied sticking a post up to find out more.

Standard 93' WRX making 280bhp with simple exhaust changes etc - interesting stats - point taken about torque & driving feel.

 

Jeezus! STi pulls strong!

Neil Riley Comparison: STi III
Type R

323 bhp @ 6530 rpm 304 lb/ft @ 3900 rpm

 

It is difficult to put in words. Mine's a standard MY00 Turbo but fully decatted. I have since driven a much more powerful MY99 Type R STi that had cats and below the 3,000 rpm mark it felt totally gutless, which is exactly how mine felt before the decat.

I would always decat a scoob when I ever I get one with them on.

 

How wierd, jinx!!!

Yup, but the Type R is a Jap import and more powerful than our uk counterparts. They're geared lower too. They'll sprint to 60 in the low 4 second mark.

I'm just about to lay my hands on a Type RA, and I'm counting the minutes

 

Do many people simply do the middle or both? Guess it depends on MOT restictions..

 

Average 0 - 60 time on standard RA? How about qtr mile times 13's?

 

Hi,
I've just bought a 99 scooby with a super chip Magnex exhaust, induction kit and one cat removed. How else can i increase BHP without bankrupting myself?

 

Forgot to say it has just over 250bhp at the moment

 

hows about removing the other cat as per the conversation above


Cliff

 

I have a MY02 wrx. How many cats do I have? how many can i remove and still be legal? what bhp should I get?

ta!

 

Having been toying with the idea myself....
MY00 has PPP so does that include a de-cat???

If not I assume at the mo its pushing about 240 so decat would take that up another 25-30bhp???

Also would I need anything aditional maybe boost controller??

Cheers Ashley

 

Happy that decating is not going to return huge gains as it has been mentioned it changes the torque & power delivery. Ok... Ok... If I get a louder exhaust note thats no bad thing either ... lol

 

When I bought my STi V M99 wagon, it had been dynoed at 286 BHP at Power Eng. It was totally standard. I've now placed a full decat exhaust system on it (downpipe, mid and back sections). Not sure what the power/torque figures are now, but I know its louder and spins up faster