Gt3037s Pro Vs Gt3071r Vs Gt3076r

[Justa32]

im looking at upgrading the tubro on my 32 from an apexi ax53b70 to 1 of the 3 ---> gt3037s pro, gt3071r, gt3076r

looking for about 400rwhp with as little lag as posible what are the upsides and downsides of each turbo??? the 3037s is abt 1k more than the other 2 but its not rated as high ? am i missing sumthing? cheers fellas

[700HP-GTR33]

You will need to give more info for anyone to advice you on this.

Little Lag...400rwhp.....?

What are your mods?

[Justa32]

You will need to give more info for anyone to advice you on this.

Little Lag...400rwhp.....?

What are your mods?

rb20det 2.2litre

Os Giken Cam Pullys

Tomei PROCAM Camshafts 256degree 8.5mm

Metal Head Gasket

Nismo 600cc Injectors

Tomei 2.2 Forged Pistons

12 Port Head

Port and Polish

Bosch 044 Fuel pump

3 1/2" Rsr Catback Exaust to 3" Downpipe

Apexi Power FC

Apexi AX53b70 -P25

Hybrid Frontmount 600x300x100

just wondering why the 3037s is alot more expensive when the others put out more hp

[paulr33]

the 3037s pro is a HKS spec turbo so it has the HKS pricetag

garrett cant offer the same spec so they give you similar options but with a lower price tag due to branding

[Justa32]

so if i was to buy the 3037 id b paying mainly for the name no benifets wot so ever?

[paulr33]

no you would be paying for the HKS combination

what ever spec, wheels, housing options etc are on the 3037s Pro there cannot be an equiv garrett unit

ie: you cant order a Garrett 3037s Pro as its a HKS locked item, and HKS have exclsuive rights to that combo

Garrett do many OEM style turbochargers but they also make turbochargers for HKS

any HKS combination that HKS come up with is made by Garrett but you can't buy it from Garrett, it must be from HKS

so its likely the 3037s is a well setup turbo for some specific engines, as HKS do the R&D and testing etc and say

we believe the combo is spot on for x.x litre engines and XYZ displacement or exhaust setup

so we've spent 10,000 hours and spent all the money testing out the combo, so you can have it with the HKS branding

[Justa32]

way to sum it up mate cheers

*edit* What would u recomend out of those 3 turbos?

Edited March 22, 2008 by Justa32

[Al]

Paul is right.

Basically a HKS turbo will spool a little faster and may make a little more power than any Garrett "equivalent". Whether the extra $'s is worth the minor gains is debatable.

With 300rwkw, the a 2.2ltr engine will always be laggy. The GT3076R (0.83A/R) MAY achieve your power goal, but is boarder-line. Also depends on your other bolt on pieces; such as exhaust manifold, intake plenum, throttle body, etc. and these parts need to be of good quality and not these ebay copy shit.

If the other two turbos have a lower power rating than the GT3076R, than don't bother considering them, if you're firm about having 300rwkw.

[Justa32]

hmmm cheers 4 all the info, think ill b going 4 the 3037s pro trying to get minimal lag even if its costs me an xtra 1k on the snail heard big things abt the turbo on rb20s

[paulr33]

if your going to put a GT3xx series turbo on an rb20 invest in a good manifold and port as much as you can

the more exhaut gas flow you get out of it, the better, especially on the humble rb20

a well setup manifold, split pulse, external gate setup could be the different of say 500-600rpm difference in response if done correctly

[discopotato03]

The basic GT3037 cartridge is the same as a GT3076R cartridge - if the compressor wheel is 56 trim and most 3037's seem to be .

What you are paying for is low volume car specific housings that enhance a specific engines state of tune . Also generally these housings help with packaging a non std turbo on a production car .

HKS kits supply the 101 fiddly bits in one box , if its a Pro S kit they also supply their Micky mouse dump pipe .

It's possible sometimes to cheat price wise by buying 2nd hand HKS housings and bolting them onto a new Garrett cartridge .

For example if you found a 2nd hand 3037 Pro S turbine housing they fit straight on GT3076R cartridge .

I don't know about the RB22 and 400 Hp , obviously it can be done but most would take advantage of a better breathing and slightly larger RB25 . I think RB20 based engines are limited valve area wise so after appropriate cams I guess the boost pressure has to rise .

If I had to guess I'd say something along the lines of a GT2835 Pro S or a real GT3071R in 0.63 A/R could get you there with an aftermarket turbo .

There's always the GCG Hi Flow option and a choice of RB20 or RB25 or VG30 turbine housings .

Cheers A .

[Justa32]

yeh mate no worries there dont like takn the cheeper option, got a well known tuner organizing a nice manifold 4 me then ill get it port&polished shuld all come 2gethor within the next 2 months

[Justa32]

yeh disco potato the gt2835 is onli abit bigger than the turbo i have on there at the moment, its a redtop nics so the head flows alot better than other rb20s, ive looked around and the 3037s seems to b the way to go for the kinda power/response im looking at, theres a internaly stock rb20 no cams with a gt3037 in perth hitting 380 so i dont see a problem with me getting 400

[discopotato03]

Someone will know but I was under the impression that the R32 GTST top end was better than R31 gear . I believe that GTS-R aside the R32 engine made more power than than R31 versions did for the same capacity .

Affordable RB25 can do better than any of these .

Cheers A .