Standard internals

[macauleyp27]

Does anyone know what the standard Subaru Impreza internals can handle ?

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[Scoobyghost]

Depends on age, condition, quality of life but general rule suggests 350hp. Every bit of extra power you ask for will take away some durability and reliability.

[macauleyp27]

Okay cool coz I was thinking of getting a td05 20g turbo and getting it mapped to 400+ but I will have to get forge internals then yeah ?

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[Scoobyghost]

Not sure what model you have but there is a lot more required than a big turbo and map. You could need injectors, possibly an aftermarket ecu to cope with that sort of power. Fuel pump would be a must.

[macauleyp27]

I have that already apart from the ecu

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[Scoobyghost]

You're not far away from it then 😊👍

[Tidgy]

TD05 is pretty old tech, be better chucking an sc42 at it or something similar.

[macauleyp27]

I'm new to all this so keep the updated information coming at lol I want to know the best way to get my car to 500 Bhp with blowing it up haha

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[Tidgy]

find a decent tuner, give them your keys and your wallet and leave it with em,,,,, lol

500bhp is alot of power so will need to have a very good spec to get it there. Full custom engine build etc, prob nocking on 20k+

[macauleyp27]

Hahah Jesus Christ the a very expensive upgrade then lol

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[Tidgy]

Yep, also way beyond the capability of most drivers.

it's very easy to say i want X power, but its a very different thing to have it and pay for it.

 

your talking £1500 for the turbo, £2000 for the ecu and thats only two things, full engine rebuild for it will mean rods, pistons, head studs, crank bearings, fuel system upgrade, etc etc etc

[savage bulldogs]

What's the year and model of your scoob ?

As that would give us an idea as to what power the standard engine and drive train will cope with .

If it's not broke .....upgrade it 😊

[Tidgy]

04 sti im assuming

[macauleyp27]

Yeah that's it mate

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[savage bulldogs]

If it's a jdm sti they are semi forged and can handle 450hp ish max (pending on condition and supporting mods ) I think the uk versions are normally good for 400hp but you'd be better off googling that to confirm.

At least you'll have the 6 speed box and R180 hubs and diff as standard, which will handle your 500 hp target .

So I'd imagine that with a fmic ,turbo, bigger injectors and uprated clutch should you should see 420hp ish .

After that you'd probably need bigger brakes and a stronger deck type block with uprated internals for reliable 450hp + .

If it's not broke .....upgrade it 😊

[macauleyp27]

Awesome I already have ap racing breaks and mines a wrx mate . It's running 350 atm

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[savage bulldogs]

Sorry I thought it was a 04 sti .

In that case the engine is probably at its reliable limit and the 5 speed 04 box is normally pushed at 400hp.

So you'll have to add £1.5 k for a 6 speed conversion kit , £3k for engine parts/ stronger block , £2.5k for turbo /injectors /fmic and the cost of the ecu .

Unfortunately that's without any labour whatsoever and you can expect just the engine build labour to be £3k +

If it's not broke .....upgrade it 😊

[macauleyp27]

Jesus lol it's gonna be a slow procedure then

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