Hi all, 

I currently have a 2010 wrx-s running 285bhp due to the following mods:

Sports cat
360lph fuel pump
Cat back exhaust
Induction kit
Remap

I’m looking to change the turbo/ inlet manifold and inter cooler to STI parts and remapping to 330ish bhp, has anyone done this before, or anything to look out for?

 

Thanks

I'm not too clued up on 2.5 spec but with the 2ltrs , to break the 300hp mark (on top of the mods you have) most fit ....

Sti turbo , sti injectors ,sti tmic and sti up pipe (as the bug /blob wrx have a pre cat in the up pipe )

Unsure if the 2.5 ltrs have a pre cat or if there's any difference in the sti inlet manifold, other than if the non sti has tgv's ? (Which i think can be deleted on your existing manifold if so)

Hopefully someone  who knows their latter scooby spec can help 

11 minutes ago, savage bulldogs said:

I'm not too clued up on 2.5 spec but with the 2ltrs , to break the 300hp mark (on top of the mods you have) most fit ....

Sti turbo , sti injectors ,sti tmic and sti up pipe (as the bug /blob wrx have a pre cat in the up pipe )

Unsure if the 2.5 ltrs have a pre cat or if there's any difference in the sti inlet manifold, other than if the non sti has tgv's ? (Which i think can be deleted on your existing manifold if so)

Hopefully someone  who knows their latter scooby spec can help 

Thanks, I figured that I was on the right track, just a bit concerned that its going to be too much for the car, but other than gearbox and clutch, I guess changing these components the engine will be ok (as it’ll be v similar to an STI with a remap)

 

Will admit the 2.5 ltrs do get a bad rep when pushed for power ,as they do tend to suffer from headgasket and ringland failure more than the 2ltrs .

The later 5 speeds seem to handle more hp than the earlier ones (350hp ish) but the added torque of the 2.5 can tend to push close to the limits of a 5 speed .

6 speed is the most comon upgrade at £1.5k for just the box (no labour) , then most save for a forged build (£5k) just in case the stock block goes pop .

But I'd suggest to speak to your mapper about the best route and power limit for your block and drivetrain,  before buying any parts .

10 hours ago, savage bulldogs said:

Will admit the 2.5 ltrs do get a bad rep when pushed for power ,as they do tend to suffer from headgasket and ringland failure more than the 2ltrs .

The later 5 speeds seem to handle more hp than the earlier ones (350hp ish) but the added torque of the 2.5 can tend to push close to the limits of a 5 speed .

6 speed is the most comon upgrade at £1.5k for just the box (no labour) , then most save for a forged build (£5k) just in case the stock block goes pop .

But I'd suggest to speak to your mapper about the best route and power limit for your block and drivetrain,  before buying any parts .

Thanks, to be honest this is a very good point and i will have a chat with my mapper about this first. The car is my daily so i don’t want to risk making it too unreliable, or costing me a bomb when it all goes wrong 🙃 !

They ditched the cat in the up-pipe for the 2.5's

Hawk onwards 5 speed is considerably stronger so shouldn't be an issue unless your ham fisted with it, i ran 390/420 on one for 15 months no issue and know a few others who have been well over 400.

1 hour ago, Tidgy said:

Hawk onwards 5 speed is considerably stronger so shouldn't be an issue unless your ham fisted with it, i ran 390/420 on one for 15 months no issue and know a few others who have been well over 400.

That’s very good to know 👍 thanks!