Garrett 2871 In Rb25 Housing

[Luke HCR32]

Need to do a turbo swap on the RB20 in my 92 R32 Gts-t pretty soon as the amount of oil it is leaking into the intake is becoming unmanagable.

I wasn't planning on doing a real serious upgrade this soon but I have a few dollars to throw at it and figured I may as well push for a 180-200 rwkw build as I'm starting to grow out of the current engine performance and have now gone through 2 stock turbos.

The car was recently dynoed at 143.5 rwkw @ 11 psi with a turbotech controller, bosch 040, front mount, 3 inch exhaust and coil packs on stock turbo and stock dump.

The car will be getting mainly street use for at least the next year so I don't want anything too violent on boost and would also like the setup to be as resoponsive as possible, I would like the potential to go to 200-220 rwkw for track use in the future.

I'm prepared to do injectors, AFM, split dump and a nistune computer at the same time.

Went to adelaide turbo services recently and they recommended the 2871 in rb25 housing for response and 180-220 rwkw power range, does anyone have any experience, thoughts or opinions on such a turbo and the required support modifications?

[AngryRB]

Need to do a turbo swap on the RB20 in my 92 R32 Gts-t pretty soon as the amount of oil it is leaking into the intake is becoming unmanagable.

I wasn't planning on doing a real serious upgrade this soon but I have a few dollars to throw at it and figured I may as well push for a 180-200 rwkw build as I'm starting to grow out of the current engine performance and have now gone through 2 stock turbos.

The car was recently dynoed at 143.5 rwkw @ 11 psi with a turbotech controller, bosch 040, front mount, 3 inch exhaust and coil packs on stock turbo and stock dump.

The car will be getting mainly street use for at least the next year so I don't want anything too violent on boost and would also like the setup to be as resoponsive as possible, I would like the potential to go to 200-220 rwkw for track use in the future.

I'm prepared to do injectors, AFM, split dump and a nistune computer at the same time.

Went to adelaide turbo services recently and they recommended the 2871 in rb25 housing for response and 180-220 rwkw power range, does anyone have any experience, thoughts or opinions on such a turbo and the required support modifications?

I used to have 2871 highflowed into stock housings on my r33, it was very responsive on a RB25, it would be pulling hard on 2500rpm, so i guess on an rb20 it might be quite good, made 214kw on 17psi ( 56trim )

Might be a good idea to go for the r34housing cause you'll want more power later on.

[hypergear]

you will find boost control a very big issue depending on what you perfer to run. R34 housing or a even the T2x .64 rear housing would be highly recommended.

[discopotato03]

My opinion is that you need to get some boost in reasonably early if you want it to pull hard without revving to the moon . I believe its more about torque than Kws but thats me . Don't write off the GT2860R units like GT2860RSs and "GT2530" turbos . The 2530 can be an easy way to get a direct fit HKS turbine housing which also works with the GT2871R cartridges - same turbine wheel .

The thing is that you need a turbine housing sized to make the turbo boost where YOU want it to in the engines rev range but often that makes the compressor end want to surege - ifs its early which is good . The fix for that is port shrouded compressor housings and the nous not to go too big in compressor trim size . The HKS GTRS (GT2871R 52T) is a good example to look at because they used a direct fit 0.64 AR turbine housing and a port shrouded compressor housing . From memory HKS also did a KAI version of the GT2530 and I think the difference is the port shrouded compressor housing . Ported comp housings are good things but they are only designed to work with one size and trim of compressor wheel - its about placing the surge slot at the right height to suit the wheels splitter (lower height) blades leading edges .

Anyhow your call , I'd be conservative because I'd prefer have the use of the turbo most of the time rather than occassionally .

A .

[Dale FZ1]

I ran the smallest 48 trim GT2871 cartridge with stock housings on an RB25. Excellent response, and best result was 225kW on 12.5psi. No boost control issues. No surge issues.

I did feel that the bigger OP6 turbine housing would have been a worthwhile improvement on top end flow. A HKS turbine housing with RB spec flange would be the best match, if one could be sourced for the right price. Hypergear's housings would be a good next-best option, and brand new. Personally, I would just have Stao machine up a compressor housing too and make up the whole unit.

Should be a great turbo to match up with a RB20.

[black bnr32]

I have 3 .86 a/r 76 trim turbine housings to fit the 2860r and 2871r, if anybody needs. standard, non-rb26 5 bolt outlets.