As title, twin scroll turbo model, came with the sticky RE070s, quick steering rack...

What are the differences between this and the Spec C apart from equipment, VF37 instead of VF36?

Are the heads big port as Spec C?

As I understand it the pistons are hypereutectic on the V8, forged on the V7, but the heads are better on the V8?

Was there a change to bigger hubs and wider track for a later version - ie 05 with the wider rear arch?

 

I am sure the track is wider on the V8 as you say John.
Graham.

 

You talking about the cars introduced in MY03 John?

bob

 

Yes

 

is it only the spec c that got a oil cooler , or did the gl?

 

The MY05 car has a wider track and better engine breathing, plus parts of the spec c suspension components (wishbones etc, not springs though afaik)
The GL has a different geometry to the MY05 and Spec C, the MY05 being the same as the MY03> spec c, the 05 has better engine breathing, a G sensor (note sensor not control) which passes more info back to the A-DCCD.
Only the Spec C had the quick rack steering, lightweight BBS alloys as standard, but engine wise compared to the GL it was similar apart from the turbo and oil cooler.

Tony

 

My GL (MY03) had the quik rack, same engine, same gearbox/dccda, HID lights, rear tints all as std. Spec c had different suspension parts and no trim. VF36 turbo was the only engine difference, ecu maps identical apart from wastegate solenoid for obvious reasons. BBS alloys were optional for mine. Water spray tank is under bonnet (8 litres) as opposed to in the boost on spec c. No oil cooler on GL.

bob

 

Bob, according to the jap brochure (sp) the drivers pack (quick rack steering, Bridgestone RE070's with the BBS lightweight alloys and A-DCCD) was an optional extra on the GL, though most had it, ive seen JDM MY03's without it.

Tony

 

What differences in the '05 engine breathing Tony ??

Thanks

 

Manifold i believe

Tony

 

Apart from the weight saving differences under the bonnet the Spec C has different water pump, radiator, oil cooler, fuel pump assembly, transmission cooler, powersteering cooling, powersteering pump (although MY05 cars now have this). Spec C's also have a different part number for the heads. MY05+JDM cars run 235 RE070 tyres

John if your in a position to afford to I would look at the MY06 Spec C or MY05 WR Ltd Spec C as these cover all the bases

Iain

www.litchfieldimports.co.uk

 

Iain,

On the MY06 Spec C, just looking at the brochure, are these the same seats they have in the S203? or just a different colour??

Tony

 

I wish They are Black versions of the STI seats the same that were in the 2003 Limited Spec C, Forester STI and the MY05 Type RA

The MY05+ cars have a diffferent intercooler and pipework

Iain

 

those recaro's were a limited run i think just for that car. they looked similar to r34gtr seats. love to have them.

 

Thanks all.

If I wanted to fit my GT30R rotated kit to a car with twin scroll headers, could I fit my uppipe which has the standard 2 bolt flange at the collector onto the twin scroll headers or would I put my HKS headers on if they would fit to the heads?

It would be appealing to have a manifold that had original heat shielding so that it didn't steam on wet/cold mornings (even though it is painted and wrapped again with foil), and as far as I know the OEM twin scroll manifold should flow well?

Or has anyone come up with a new uppipe that goes into an OEM twin scroll manifold to fit a full Garrett - ie Garrett exhaust housing?

 

Hi John, you'd need to get a custom up pipe made there isn't anyone doing a bolt on kit yet, isn't to tricky though. Tomei do a set of tuned headers but I have not seen them tested, the std JDM headers are very good.

Regards

Iain

 

Tony mine came as std with all that, option pack was for lower versions when I purchased.

John as Ian says ... with some porting the OEM spec headers are VERY good.

bob

 

AFAIK only the WR ltd. SPEC C 05 came with different hubs and bigger rear driveshafts.

 

John

I'm sure we could adapt the OE T/S headers immediately before the turbo to capture most of the benefits.

Andy

 

Sounds good

 

John, this is what I had been looking for tells most of the main differences:

http://www.subaru-sti.co.jp/e/GRN/bulletins/040902.html