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 Post subject: 02 gt engine swap jdm gc8 v6 sti engine swap
PostPosted: Tue Aug 29, 2017 4:20 pm 
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Vehicle: MY02 GT

Posts: 1
Location: newcastle
hi all fairly new to cars very new to subaru love the car anyway i have an 02 gt forester thats getting a bit tired and i have got myself a version 6 jdm sti engine with ecu and uni chip tuned for a 99 gt firstly can and has anyone done this swap and secondly what problems will i encounter im assuming that the sti will bolt straight in but i have noticed differences in the engines 1 has coil on plug the other not any help or advice greatly appreciated


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 Post subject: Re: 02 gt engine swap jdm gc8 v6 sti engine swap
PostPosted: Wed Aug 30, 2017 9:36 am 
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Vehicle: MY99 GT bare shell on stands

Posts: 2975
Location: Kyneton, VIC
Have you already bought the v6 engine? If not, don't. It's a generation behind your car, and might be impossible to engineer due to being older than the car.

v7 STi is a relatively easy swap and big improvement. v6 STi will require a complete half cut as so much is different. If you just have a v6 STi long block without the full bulkhead loom, engine loom, ECU, and all related modules, put the v6 engine up for sale before you start pouring money into a pit.

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"I can't believe there's a forum for such an ugly car" - the missus
"I just want the forester back. I loved that car." - 5 years later


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 Post subject: Re: 02 gt engine swap jdm gc8 v6 sti engine swap
PostPosted: Wed Aug 30, 2017 9:54 am 
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I Say: Do or do not, there is no try.
Vehicle: MY17 BRZ, MY11 BT-50

Posts: 16228
Location: Medowie (near Newcastle), NSW
so you're suggesting using a V7 without the AVCS running? that is the bulk of the improvement. V6 sti has better heads/cams AFAIK without the worry of AVCS.

V6 may be fine with the current engine valve covers (to make it coil on plug if everything underneath lines up) and 02GT ECU should be able to run it.

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 Post subject: Re: 02 gt engine swap jdm gc8 v6 sti engine swap
PostPosted: Thu Aug 31, 2017 11:17 am 
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Vehicle: MY99 GT bare shell on stands

Posts: 2975
Location: Kyneton, VIC
Quote:
02GT ECU should be able to run it

That would be a pleasant surprise. Different AFM, different rear O2 and placement (post cat vs pre cat). But you know far ,more than me on these things :dontknow:

None of that affects it being an illegal engine choice under NCOP guidelines, so while you won't get it non-dodgy engineered, id' be surprised if anyone doing RWC or VicRoads would notice.

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"I can't believe there's a forum for such an ugly car" - the missus
"I just want the forester back. I loved that car." - 5 years later


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 Post subject: Re: 02 gt engine swap jdm gc8 v6 sti engine swap
PostPosted: Thu Aug 31, 2017 11:59 am 
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I Say: Do or do not, there is no try.
Vehicle: MY17 BRZ, MY11 BT-50

Posts: 16228
Location: Medowie (near Newcastle), NSW
Why would you have to use the V6 STi AFM? Use the one in the car. I'm suggesting only replacing the long motor (and valve covers for COP fitment). Manifolds, wiring harness and sensors off the old engine. Add some 550cc top feed injectors, VF30 sized turbo, walbro fuel pump and tune it.

The rest of the gear the OP has (ECU/unichip etc) just makes it harder if you want to use it.

The buyer has to know what bits are really needed for their application and either pay up to get the bit they want (and be willing to sell off or bin the excess parts) or haggle the price to something acceptable......most wreckers want to sell a package, so good luck there.

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Often cynical and/or sceptical
New Ride MY17 BRZ Last Ride Image Previous Ride Image


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