ash9988777

I have a 2005 wrx blobeye. standard apart from a pipe from the rear cat. how can i get 300bhp? and how safe is it!? in terms of putting that power through the gearbox etc

dave247

Get an STi PPP

simples!

jaywrxsti

quickest way buy one thats already 300 j

5doorbullet

iTrader: (1)

I went for 550's, 16g td05, 255l fp, and a 3 port , then a ecutex by jgm and made 331/329. your gear box is good for 400hp going by Andy f and thats what i'll be going for next

just get it done

s70rjw

iTrader: (2)

That would have to be a Hawkeye to get 300. PPP cars rarely make the quoted bhp in my experience ( 2 cars). I have now gone down the decat / remap route with far better results

scoobiewrx555

If you're brave enough to put 400bhp through a newage WRX 5spd box and use it in the manner a Subaru is meant to be used i sincerely hope you have some savings because you will be needing a new box or rebuild in due course.

There's a reason why both WRX engines and gearboxes aren't recommended to go over 330-350bhp/Torque...because they're not built for it.

An STi V7-V8 engine will take 500bhp+ at push and 400bhp+ all day long on std internals. A standard 2.5STi won't take even 400bhp all day long because they're not as strong as the 2.0L engines, although all 6spd STi gearboxes will take over 600ft/lb on std internals. Why?...because they are over engineered for it.

I'm putting 350/360 through my 5spd box and it's seriously creaking under the strain as are many other 5spds i know of making similar power/torque to mine. It's just a matter of time before it goes bang and i accept that but 400bhp is a bit over optimistic IMHO.

I know people with 5spd PPG internals in their boxes and they still go bang, which is why a fair few time attackers use std 6spd boxes with the first 5gears from a JDM STi box and a UK std 6th gear.

A 6spd is the way to go and is plenty strong enough for most of us.

Mark'sWRX

Ok. We accept that 400bhp is a bit much for a 5 speed to handle, but back to the OP's more reasonable 300bhp....

If you decat the whole exhaust (or put in a sports cat for legality) and a good remap could see 280-290bhp.

To get to 300+, you need bigger injectors and a bigger turbo and an uprated fuel pump.

my94wrx

iTrader: (4)

my opinion, tdo5 (front entry converted) sti pink 550cc injectors sti topmount
decat up-pipe (any off of a classic will do) and depending on where you live get Andrew Carr to open source map it, you will have over 300/300 and a nice drivable car to boot, job done