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I bought a brand new gt3071r from some guy who was meant to put it on his car but ended up using something else. Anyway, by my own fault, I assumed it was a t3 gt3071r as I was under the impression all gt30 turbos(well majority) are t3. This one though is a t2.

Could I run a t2 to t3 adapter? Its a .86 rear and the front is .50 or some shit.

Cheers.

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I think room will be fine. I just need this clarified.

Is the ONLY difference between a T2 .86 and a T3 .86 the flange? Is the housing the same size? Will the flange size be restrictive or will it open up inside the housing to allow the same flow of exhaust as a T3 just be abit tighter up front? I don't want to hit 5krpm then watch a downhill decent...

they have a different turbine. In general; cropped gt30 in the t2 housings vs uncropped gt30 in the t3 housings.

Though the .86 t2 sized housing is roughly equivalent to a .63 t3. OK for a 3071 on an rb25 though the internal waste gate size may be marginal.

I was considering trying this exact turbo. Could be a cheap way to get near GTRS performance on an RB25. I would expect it would be slightly restricted by the smaller flange but it depends on your power goals. GTRS (2871) don't make all that much power anyway. A full turbine 3071 will give more top end but at the expense of response. Some would say you might as well go 3076.

No they do both 84 and 90 trim turbine versions . Turbo number 700382-3 using cartridge number 700177-3 has the 84 trim turbine where unit 700382-20 with cartridge 700177-4 uses the 90 trim turbine variant .

Also all the so called HKS GT2835 variants use the T2/25/28 flange size except the Pro S ones which are T3 footprint .

I think the easiest turbine housing solution would be for Garrett to machine their GT30 IW ones to match these cropped turbines , a cropped GT30 turbine would work better in a GT30 turbine housing than GT28 ones IMO .

A .

Yeah I didn't be more specific before. The 90 trim TURBO part number is .86 but has a housing option for .64 and the TURBO part number for the 84 trim is .64 but has a .86 housing option. I assumed the turbo is just an off the shelf Garrett part. My bad.

Ah shit forgot about HKS T2 flanges

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