Turbo Choice

[vl rb25 boy]

I Have been reading all through the rb25 upgrade pages and have seen a few people use the HKS 2835, does anyone know what the garrett version of this would be please?

[wolverine]

best comparison turbo is GT3071 but there are a few versions of this turbo so apples aren't exactly apples.

[vl rb25 boy]

best comparison turbo is GT3071 but there are a few versions of this turbo so apples aren't exactly apples.

ok thank's mate i will look up on them, trtying to figure everything out i want to make around 350hp

[impact_blue]

you want the 3071 with the -23 at the end of the cartridge number

[discopotato03]

Briefly you can get some of the same cartridges or center sections used by HKS in their "GT2835" turbos .

These use a cropped or ground down in size Garrett GT30 turbine , but only HKS had proper turbine housings made for the cropped turbine . The versions Garrett market use the wrong family of turbine housing (GT28 rather than GT30) and not surprisingly the results are very ordinary .

HKS use an older turbo number description system and parts of it are just plain wrong .

1) There is NOTHING GT28 about the turbine in a "GT2835"

2) The "35" bit means GT35 series 71mm compressor wheel .

The current Garrett numbering system describes a "GT2835" as a GT3071R , GT30 meaning GT30 series turbine and 71 meaning 71mm compressor .

The later system doesn't differentiate between cropped or std GT30 turbines , it assumes the buyer knows which one they want and order it by part number .

A VERY important thing to note is that Garrett don't make a T3 flanged turbine housing for the cropped GT30 turbine , technically only HKS have them on their GT2835 Pro S RB20/25 bolt on turbos .

If you could find one of their turbine housings you could fit it to a Garrett marketed version but it's not the same because HKS's compressor housing is different as well - designed to work together as a complete package .

Bottom line , HKS designs engine specific turbo options where Garrett markets generic units .

Cheers A .

[wolverine]

a GCG hi-flow will achieve everything you want and more for the least cash.

[paulr33]

agree