what is the biggest turbo that fit on the stock manifold...

GT28RS???

I, would reckon almost any turbo combination with a T3 exh. housing. Hope that helps?

GAS wrote:

I, would reckon almost any turbo combination with a T3 exh. housing. Hope that helps?

you sure you not talking about T25/28?
T3 is top mount???

On the 20Det Motor 25/28 and on th RB25 a T3. Sorry, did not know what you've got 😕

gt2876r goes like stink with some cams

Yeah GT2876R is the biggest I've had and I couldn't imagine much else fitting in there. But you need to do some work to get it to spool acceptably early enough. I did everything I could excpet for some cams and it hit full boost at 4500 rpm on a CA18DET.

i am thinking on doing gt2871r on my ca will it be good with the a 53 rear housing?

They are all 53.8mm on the rear (exhaust) housing from Garret

On the Compressor side however, you get the following:

52 Trim = 51.2mm = 250-400 bhp
56 Trim = 53.1mm = 280-475 bhp

The 56 Trim is laggier, commonly people go for the 52 Trim as it's a good balance between power and spool time on the CA and SR (smaller capacity engines)

There are other versions available but they are rare as far as I know.

See here for Garrett's tech sheet on 2871 and more in the range:
http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/turbo_comparison_sheet.htm

maybe i must just go top mount like my old setup on the S15.....GT3037S-pro^^

What are you looking at achieving?

djtreble wrote:

What are you looking at achieving?

the setup on my S15... HKS2,2 +GT3037s-Pro = 450hp at rear wheel
@ 1,9bar

If you don't want to go top mount then you can get that out of a GT2876R with the 56 Trim at a stretch.

Either way you are looking at a laggy car unless you go heavy into cams, etc.

Sounds like a beast though! 😈

on the GT3037s-pro turbo only kicks in at 4000rpm...
so would expect the GT28 no later then that....

I don't have personal experience with the GT30's, is that proven or by hear-say?

djtreble wrote:

I don't have personal experience with the GT30's, is that proven or by hear-say?

forgot to say i have Stage 3 head package from HKS too... GT30pro... is the best i have experience... i had Trust T67-25G on the same setup with 398hp... and it has much bigger compressor but it came no where near the GT30 pro

Sounds good!

But the 4k spool is down to the head package, so a GT2876R might be quicker?

And I just realised it now, you have a S15? In SA?

djtreble wrote:

Sounds good!

But the 4k spool is down to the head package, so a GT2876R might be quicker?

And I just realised it now, you have a S15? In SA?

i had S15 in NZ years ago... when i was there for 3 good years

Oh right, so you alos had the clever idea of moving back 😂

djtreble wrote:

Oh right, so you alos had the clever idea of moving back 😂

one day^^ probably not NZ but OZ^^