hi, i have a 04 sti running 372bhp. its got a bigger turbo, fuel pump, typhoon. i want to do some more mods to it but my question is how much power will the clutch and gearbox take as i dont realy fancy replacing them if i can help it. i do try and not go mad in 1st gear but have my moments!

 

Mine started slipping before it was mapped to 390/360 and had been fine running for years at 340 bhp. On removal it is in good condition, but was simply unable to handle the increased torque. 2002 STI. Started in top gear first and then gradually got worse.

Sorry !

dunx

 

The standard clutches seem to be good in the Newage STI's and will certainly cope with over 400/400, *if* treated properly. Worry about it when it starts to slip.... just make sure you don't ride the clutch. The more launches you do, the more chance you have of popping it. As far as the gearbox is concerned.... myself and many many others run these at over 500/500 with no problems.

 

500! nice that sounds good. i have on my wish list a ecu, bigger injectors, tmi, not sure what sort of bhp gains i should expect from this, any idea ?

 

My clutch on my 2003 STi is fine for the time anyway....running 432/375.

 

Depends on your turbo ultimately.... what is it?

 

its a scooby clinic sc40 i think its called

 

Not sure about your clutch but your gearbox should be fine for loads more. I have the same box in my 2.5 and it has survived many many full blown drag launches with around 460/520.