sti ecu on non sti v5 wrx need advice asap

[potent_wrx]

hay there im planning to buy an sti ecu for my version 5 wrx its running sti components and 16psi boost as is so i was goin to buy 1 tomorrow is it a good idea? the internals are stock so i want to know if it can handle it?

[Kiwi_Fozze]

i\'d be getting a good boost controller and keeping your boost below 14 MAX preferably between 12/13psi. your compression ratios are different, the cams are much smaller. if you swap in a new turbo, big gains to be had, if you can keep any detonation under control. i want to get mine straight on to a dyno to check it. apparently it can det quite bad, but i\'ve never done it.

[potent_wrx]

ok yea i took mine for a dyno and now thats y i am upgrading my cars running to rich because of the sti injectors and i had a plate welded in my exhaust that f@#%ed with the back pressure and it only made 152 kw but now the exhaust is fixed so should make more just want to sort out the car running rich

[Kiwi_Fozze]

well, if you are going on a dyno, please keep us updated on the detonation readings?

[potent_wrx]

yea sweet as ill take a photo of my current readings will update when new ecu is in and get back on the dyno

[potent_wrx]

what im trying to get at with this topic is will my car go boom! with an sti ecu or will it be fine ;D

[Kiwi_Fozze]

no, it won\'t go boom straight away.... if you wind the boost right down it *should* work exactally the same as swapping a 6s ecu in on the older v3/4 cars.

v5/6 has identical afm\'s for both wrx and sti, and i believe the injectors are the same too.

[potent_wrx]

ok haha i noticed u said (not straight away) but thats wat i was wanting to know thanks ill put the ecu on go for a dyno then turn it down if readings are bad

[Guest]

 kwi_fozze said:

no, it won\'t go boom straight away.... if you wind the boost right down it *should* work exactally the same as swapping a 6s ecu in on the older v3/4 cars.

v5/6 has identical afm\'s for both wrx and sti, and i believe the injectors are the same too.

Correct

What do you mean its running sti components? If its running a J2 sti ecu you would need the turbo to suit VF28 or 29 otherwise it will be out of wack anyway and you may as well get a link or possum.

Im running a V8 block with V6 sti heads on stock wrx ecu A2 I think and its about 1/3 of the power it was just doesnt feel right at all. No funny noises or det or anything silly and fuel consumption is about the same. Only doing it till i get G4 tuned and not boosting anywhere.

[Kiwi_Fozze]

Yer vf28/29/30 or vf 22/23/24. Preferably the newer ones

[Guest]

VF22/23/30 wont suit the J2. Vf24/28/29 are all much of a muchness.

[potent_wrx]

sti injectors afm and standard vf22 turbo

[Kiwi_Fozze]

only if running v3/4.

3 plug ecu, orange afm, yellows and turbo.

on a v5/6 just swap out the ecu and wind the boost waaaaay down.

not taking in to account detonation issues if any

[potent_wrx]

just found out mine is a v4 so if i get an sti ecu itll be fine?

[Kiwi_Fozze]

you are looking for a 6s or similar in that case

[potent_wrx]

im about to buy this 1 is this what im after and will my car detonate?

http://www.trademe.co.nz/Browse/Listing.aspx?id=522934072