Hi !

I have just bought a UK 2001 WRX. No mods other than a WR exhaust.

Have been told using Optimax 97 Ron Super can give around 20 bhp more than 95 ron unleaded. Do you agree ?

Also, I was considering fitting a Revolution decat backbox and centrepipe but leaving the downpipe. Would then have an Ecutek3 done.
What bhp could I expect and will i be reducing the engine's lifespan sigificantly ? And would the car pass it's MOT without swapping exhausts
back ?

Cheers !

 

Only if you up the boost a little! What you get is a car that's less likely to det in hot conditions or when you're giving it heavy right boot.

98 ron will give a fraction more power (cant quote figures for your car though) and will make her run smoother. It does also give you chance to up boost slightly with boost controller without to much danger - suggest having boost gauge, det cans and an air fuel meter before doing this though.

 

~ see same thread in General.