Reshard1977

iTrader: (17)

Hi all!

I'm trying to build a wrx that spools as early as possible. I have a TD04 hybrid, ported headers, harvey up pipe, etc.

My long term goal was to eventually convert to AVCS heads, i understand it will make the turbo spool by about 200rpm sooner. But, i'm wondering, will porting and polishing my WRX heads be a better/cheaper route to getting the turbo to spool as early as possible?

Cheers in advance for sharring your experience!

blackpoolrock

Save the money and get avcs heads

jura11

iTrader: (7)

As above save money and go with AVCS,porting and polishing will cost as good used pair of the AVCS(with some luck you can find JDM Big Port heads)

Depends on ECU what you are running,but on WRX ECU you can't run AVCS,you will need JDM WRX V7-V8 ECU which can control AVCS or aftermarket ECU


Jura

kb1

iTrader: (1)

Hawkeye wrx heads are very good..

jura11

iTrader: (7)

He can't use them on 2.0L without being CNC'd,but agree they're great heads


Jura

blackpoolrock

Agreed

Reshard1977

iTrader: (17)

I know where i can get a good pair of AVCS heads for an excellent price.

Is it true, that the AVCS heads will make the turbo spool up 200rpm sooner?

Rbon91

iTrader: (6)

Ive got a question would V3 cams fit with V7 WRX heads?

AS Performance

iTrader: (4)

no the cams have an oil feed to supply the AVCS system.........

Rbon91

iTrader: (6)

Sorry V7 non avcs heads
thinking for putting cams in to make reverse inlet easier

MOTORS S GT

iTrader: (2)

No, the thrust control for the cam is different.

Rbon91

iTrader: (6)

Ok thanks anyway

AS Performance

iTrader: (4)

if its a ph1 manifold car then this cant easily be modded to fit ph2 type heads ('99MY on)

IMO you would be far better looking for v3/4 STi heads and cams complete

Rbon91

iTrader: (6)

Have complete V3 heads to put onto the 2.5forged shortblock.. spoke to alan at Engine Tuner today. He said v3 heads need machining to fit 2.5? Else compression is to high?