Sorry to ressurect this but I'm also looking at the direct fit GT30 RB fitment turbos.
Interestingly, the specs for these turbos show different exhaust A/R's 0.76 (tweakit) and 0.86. Either there are 2 housings available, or one isn't genuine Garrett housing or someone has duff info. Also tweakit as about 1000AUD cheaper.
The tweakit one as listed earlier;
Garrett GT3071R Kit forRB20/25
480HP Kit Includes
Garrett GT3071R-20 (700382-5020)
RB Turbine Housing (RB25-GT28)
Hi-Flow of Turbine Housing
RB Water/ Oil Kit
Dump Stud Kit
T/E Clamp Kit
Actuator Bracket and Rod
RB Intake Pipe and Outlet Hose Kit
Price: $2638.00 inc GST
He's since sent me further info as follows;
See below for the full specs on this turbo:
GT3071R Ball Bearing Internal Wastegate
(Product Code: 700382-5020)
Part Number: 700382-5020
Model Number: GT3071R
Approximate Horsepower Range for Engine Capacity: 300-480Hp (1.8L-3.0L)
Compressor Housing: 467987-0015
Compressor Housing Air Ratio: 0.50
Compressor Wheel Inducer Size (mm): 53.14
Compressor Wheel Trim: 56
Turbine Wheel Exducer Size (mm): 53.6
Turbine wheel Trim: 90
Turbine Housing & Air Ratio Size: 0.86
Turbine Housing Inlet port: Single
Integral Wastegate: YES
Actuator Pressure (psi/kpa): N/A
Water Cooled Centre Housing: YES
Ball Bearing : YES
These are from what I can gather as Garretts answer to HKS for the GT2835 Pro S turbos. I think the BHP figures of 480-500bhp are way optimistic but then I'm only looking for a nice strong 400-430bhp anyway at relatively sensible <1.5bar boost.
My spec is stage 1, I intend to fit the turbo at 0.85-1.0 bar to start, then change injectors and ecu (Nismo 555cc and Link G4).
Any thoughts or comments on these turbos?
Does anyone here actually own one.