Silvia Club of NSW

I have looked on the Garrett website to find the specs for a 3037 but cant see it on there website under the product or the comparision page. Is this an obsolete turbo?

HPinabox list it

This is the smallest of the T3 style ball bearing turbo's that Garrett do. It has a T3 base flange and normally comes with a .82 external wastegated exhaust housing. As standard has a .70 compressor cover and Garrett dual ball bearing internals.

but nothing on Garrett site, is it called something else?

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

I think you will find that Garrett do not, and never have actually produced a 3037. '3037' is HKS terminology, and the closest thing that Garrett have to that is the 3076.
If you want a responsive gt30 turbo, then 3071 is the way to go

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Disclaimer: I actually DO know everything

Sil80 - SR20DET 231rwkw
Silvia Race Nugget - SR20DET 225rwkw
Stagea - DeathWagon - RB25DET 185rwkw.

My Lame Gallery: http://www.toomuchboost.com/gallery/main.php

its just that HPinabox call it a Garrett turbo as others have.. I was just curious what the specs were. If I was to replace my turbo my leading choice would be the T3 flanged, external gate GT3071R with the 4 bolt pattern.

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

Garrett resellers have always used a fair amount of creative licence with turbo naming.

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Disclaimer: I actually DO know everything

Sil80 - SR20DET 231rwkw
Silvia Race Nugget - SR20DET 225rwkw
Stagea - DeathWagon - RB25DET 185rwkw.

My Lame Gallery: http://www.toomuchboost.com/gallery/main.php

Just about says it all....

http://www.atpturbo.com/Merchant2/merch ... y_Code=GRT

Garrett GT3076R (aka GT30R aka GT3037)

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

Yeah the HKS 3037(S) is essentially a GT3076R (or "GT30R"). Garrett only offer the compressor in a 56 trim so the 48 and 52 remain HKS only. Moreover, HKS have their own custom front and rear housings so the Garrett GT3037 will never be the same (and is debatable whether it'll be just as good). Given the cost of the HKS units, I'd be picking the Garretts personally. Moreover it seems its pretty hard to buy the HKS ones too these days.

PS the "3037" refers to the GT30 (60mm) turbine and GT37 (76mm) compressor families. Same could be said about the GT2835R etc. Garrett however, prefer to designate the latter number as the compressor diameter instead.

Bloody confusing all these different numbers for the same turbo. Especially when places like HPinabox sell it as a GT3037R instead of GT3076R which is listed on the Garrett website.

Interesting point... I was at JEM on the weekend and I was looking at the dyno wall comparing the different dyno graphs. I was comparing different SRs just to get an idea on how the different combo made power against each other.

The much talked about 3071 didn't actually perform as well as the 3037. Both the 3071 and the 3037 made nearly identical power at 3000rpm (3037 made few kw more) but the 3037 actually came on boost sooner and stronger and made more top end power than the 3071.

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

Just remember that there are different versions of the 3071 and you may have seen the result of dirty cutback t3 wheel in t2 internal gate housing.

What was the boost threshold of the 2 different turbos and revs at which peak boost occured out of interest? I ask because i expect neither to be making substancial boost below 3k.

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meh

I drove an S15 with a 3037 (HKS) on the weekend.
Loaded up at 3000rpm it makes a maximum of 3psi (top gear up a long hill at full throttle) and has no real power till 5000.
I don't recommend it unless you want a dyno queen!

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The Engine Whisperer - fixer of things

both had very simular boost one was 19 and the other 20 I think.
The 3071 had 260 cams and the 3037 had 272 cams.

I would assume it was the T2 housing one. Have been emailing Morrie @ HPinabox and he said the T3 version is not available in Oz due to manufacturing diffaculties. So the only other way of getting one is to import from the US or buy the 3076 which has the T3 housing.



Think if I was him I would be looking over the setup. The 3037 made full boost well before 5000. It was about 500rpm quicker on boost than the 3071.

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

yeah the setup will be changed to a smaller turbo, new ECU, and a whole bunch of other things.

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The Engine Whisperer - fixer of things

Really suprised me that the bigger 3037 turbo actually made boost faster than the smaller 3071 but the dyno doesn't lie (normally). Not sure if the bigger cams allowed it to come on earlier through the mid range but I would have thought that it would have done the opposite.

I would have thought that it would have had a weaker power figure coming onto boost but it didn't. Adam swears by them on SRs.

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

what top end power figures were these two making ?

3037 = 267, 3071 = 240, neither were really making max power. I would gather by the simular figures they were both fairly stockish.

Both had very simular boost curves. The 3071 was lazy in the HP department, I mean it made about 180 of the 240 ok but the remainder took a while like it wasn't passing enough air to make the power.

The 3037 spooled up quicker and stronger, made its very close to its peak power and held it all the way to redline. On paper the smaller exhaust housing on the 3071 should have come on boost sooner but not the case.

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I didn’t break it, I just modified the operational status...
There are 10 types of people in this world, those that understand binary, and those that don't.

If the 3071R was the T2 flanged one then no wonder it performed pretty badly. Although I'm suprised the 3037 (and if it was the "S") didn't make more power but then again it depends on what trim and A/R the 3037 was configured for. Most dyno charts I've seen you get well over 1 bar at 4000rpm.

Also remember HKS's T2 flanged housing A/R of the 3037 is not the same as to Garretts GT T3 flanged turbos "GT3076R" as HKS's is a full custom job.