Hi, can anybody tell me what it would ultimately take to get a 2.1 closed deck to work with a set spec c big port heads? And what it would take to get it working in a 03 wrx?

Also what are the benefits with going with 93mm pistons over 92.5mm?

Thanks, Toby

 

Lots. As there is no point putting standard heads in there.

Wiring looms
Converted ecu (alcatek) or syvecs
Crank pulley
Pipework
Cam covers

Plus upgrading them with cams valves etc.

I'd stick with v6 heads with some porting and polishing. Plus it's a lot easier finding agood set of v6 co pared to avcs

 

Thanks for you're help and knowledge !!!

I'm on the hunt for some good condition v6 heads now, don't suppose you know the differences between v3 and v6 sti heads?

Thanks, Toby

 

V3 won't fit your car due to differing inlet manifold, iacv, ignition etc

 

Cool just got hold of a set of v6 heads, do you think it's worth going shimless buckets on the v6's or stick with the oem shim under buckets? And what would be the best intake manfold to run do you reckon?

Thanks a lot

 

Stick with your inlet and under shim buckets unless you're going to start spending massive money and go for extreme power

 

Is it worth going oversize valves and upgraded spings? Also what duration and lift do you reckon on the cams or just stick with the standard cams?

Thanks mate

 

If you plan on running anti lag a lot, then go for a selective/shimless bucket conversion on the heads because it has been known for the underbucket shim to become dislodged from the top spring retainer in certain circumstances.

Mick

 

Thanks mate, who makes a good set of cams these days?

Also could anybody recommend the best oem/after market inlet manifold to use?

Thanks

 

Bump

 

Bump

 

If your going to use aftermarket cams etc you may aswell have got avcs heads....

Standard inlet is fine

 

Cool, i'll leave the heads standard with just a pnp, unless it's worth doing +1 valves and a spring kit?

And i take it i'll be alright to use a 92-95 timing kit with the v6 heads?

Thanks

 

No no pint doing any of that. All depends how mad you want to do. I did over 550hp with my standard v3 heads.

Timing kit is on the block so use the one to suit your block

 

My 2.1 with spec C (standard) heads made 653 BHP.

 

No worries i'll leave the heads alone lol

What size injectors do you reckon for 500bhp? And should i do billet fuel rails and parellel fuel lines?

Thanks

 

Apologies if I've missed something: you have a 2.1 CDB, with V6 heads, going in to an '03 WRX?

From a wiring/ECU perspective the easiest is a 2001-on inlet. The engine loom will mate up directly to your car, and, if you'd gone for AVCS heads after all, you would have just needed an add-on AVCS wiring loom. Fit a newage STi ECU and then you can have it mapped for the 2.1/injectors etc.

If you already have a V5/6 inlet, you will need to sort the wiring out on the engine loom as it won't mate up properly to the car, and the idle control will definitely need a Syvecs or similar.

If you've not sourced an inlet yet, I would strongly recommend a newage one (it will fit the V6 heads) as then the wiring is a much easier task, with a much wider choice of ECUs (AlcaTek, SimTek, Syvecs, OEM etc.). If you get one with TGV's these can be "deleted" or seek out a Spec C/2005 JDM inlet which doesn't have them.

IMHO

 

Awesome thanks for you help!

Would this work for my needs?...http://www.ebay.co.uk/itm/JDM-Subaru...MAAOSwIzNXO2o5

Thanks a lot

 

Yes, that looks OK (if pricey!!). With no AVCS you can use your existing 2003 WRX engine loom on this.

 

Just use the one you already have on your car....

 

Good point!!

 

I can't help but think he might be making a mountain out of a mole Hill here lol

 

Cool, yeah ill have a look about and see if i can find anything for cheaper lol

I can see me bringing it to you to finish the wiring as your only in dorset and i'm in devon, but what would be left to do on the wiring side of things?

Thanks

 

Have you not still got your WRX inlet? If not, they are probably readily available from breakers for not a lot.

If you use the OEM 2001-2005 WRX loom (or STi, but that has AVCS connectors which you won't need) then there is no wiring to do

 

To be fair, i haven't really done anything yet, bought a closed deck for cheap and now just gathering as much information as i can

 

There is no wiring to be done mate on your set up.

Where are you based?

 

For example: https://www.scoobynet.com/car-parts-...d-01-05-a.html

 

Down in Torbay mate, and honestly thanks for your help!!!

 

Awesome, would i still be able to use my standard ecu if so how limited would the tuning be? Or is it worth going aftermarket?

Thanks mate

 

I'm not far from you then. I'm near plymouth.

Your best bet is get over to engine tuner in Plymouth...