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Old 01-26-2005, 10:15 PM   #1
SJwrx
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Join Date: Feb 2002
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Default MY02 WRX chasis...V7 or V8 spec c?

Hey Guys,
Been doing a lot of research over the past couple years and am actually looking at my exact options I have to deal with.

Swapping heads, ECU, turbo system onto an 100k engine isnt worth it when you can just drop a Spec C in. Now the questions start boiling down to which to choose, a V.7 or a V.8 (I really want twin-scroll w/ AVCS)

I was told (somewhere around here) that a V.7 Spec C will "plug -in" and all I have to change are the wires for AVCS... how much of that is true? Im finding it hard to believe my USDM chasis/engine harness is the exact same, and will plug into a JDM V.7 Spec C ECU with the simple addition of 4 wires for AVCS.

Please, can anyone give me a rundown...

If I go with a V.8 transplant, how much wiring am I relistically having to do?

Rich
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Old 01-27-2005, 10:59 AM   #2
ImprezaRSfan!
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wiring up the ver 7 and ver 8 is going to be pretty much the same. U use the wrx harness and buy an IAP performance avcs wiring kit off him and ur done. The ver8 has 1 extra sensor i forget which, not sure if its needed or not
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Old 01-27-2005, 03:19 PM   #3
garface
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It shouldn't be that hard to believe, they're the same chassis, same basic engine, the only real difference is the AVCS. I'm pretty sure you can bolt it in, swap the ECU's, add the AVCS harness, and you're pretty much done. Wish it was that easy for the GC's.
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Old 01-27-2005, 05:15 PM   #4
SJwrx
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Quote:
Originally Posted by garface
It shouldn't be that hard to believe, they're the same chassis, same basic engine, the only real difference is the AVCS. I'm pretty sure you can bolt it in, swap the ECU's, add the AVCS harness, and you're pretty much done. Wish it was that easy for the GC's.
Let me just ask a straight question. Will my V.7 harness plug into a V.8 spec C ECU (with the addition of the AVCS wires) and that will be it as far as wiring goes?

I find that very hard to believe... just give me some feedback

Rich
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Old 01-27-2005, 05:20 PM   #5
garface
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MY01 RS Both Silverthorne

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Well, if it helps, I have used two Ver. 7 ecu's and one Ver. 8 spec-c ecu on my Ver. 7 swap in my GC with Ver. 7 wiring. Even a US WRX ECU will plug into either harness AND run either engine.

Last edited by garface; 01-27-2005 at 06:38 PM.
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