wayner845

iTrader: (2)

Can my 2003 uk sti be converted to a 2.5 with forged internals strong enough for 500bhp and what is the most economical route.
Or what are my options 2.1 or 2.3 ,i am after loads of torque at lower revs.
This is all just looking into the future and what i may do the car.

Cheers
wayne

TonyBurns

iTrader: (3)

2.3 is the one to go for really, there are inherent weaknesses in the 2.5 block that if the engine isnt built right it will fail, downside with the 2.3 is that its not cheap, and anyway, its not all about power, people want 500+ but you cant use it 99.999999% of the time anyway so 400 is a far more useful and achievable figure (and about 20k cheaper!)

Tony

wayner845

iTrader: (2)

already over 400 but i hear what your saying

WRX_Rich

iTrader: (5)

I have a 2.5 running close to 500 and have loads of low down torque

be care full what you ask for as a road car having buckets of power low down requires a bit of extra driver skill to master and things quickly get out of control if you’re not concentrating - dare I say, the car is not as fun to drive on some of my favorite roads in comparison to when the car had less power, but I have a host of new roads

If I was doing it on a budget I would go for one of engine tuners 2.1 strokers and stick to 450 ish

Mus

iTrader: (2)

i drive a classic but with a little over 500bhp on a built 2.5. even on my old spec 2l 420 bhp in a type r you just have to drive extra careful as they start to get a little twichie in the cold and wet

wayner845

iTrader: (2)

Thanks for the advice guys 2.1 sounds good probably work well with my MD321t.

STI_Baly

iTrader: (23)

My Oh My Wayner you put a few threads up haven't you mate??? Lol....

wayner845

iTrader: (2)

too much time on my hands lol