discopotato03

Hi all , need some pics of Garretts GT37R . There is a lot of confusion overwhat these things are internally . I found specs for three versions being called stage 1 2 3 .

St 1 GT37 turbine 72.5mm 78 trim with 82mm 50 T compressor . 751473-0013S
St 2 GT37 turbine 72.5mm 78 trim with 82mm 56 T compressor . 751473-5001
St 3 GT37 turbine 72.5mm 78 trim with 88mm 52 T compressor . 751473-5006S

I like to think the spin doctors at Garrett Japan used the latest technology BB UHP turbine , unlike the 84 trim bush bearing version , in this latest GT37R .

Compressor wise its hard to know but my guess is that the compressors have been lifted from 1) the bush bearing GT4082 , 2) the GT3540R and 3) the GT4088R .

The specs I read say St 1 and 2 use an .89 AR turbine housing and St 3 a .99 AR housing . Its got an actuator on it so must be integrally waste gated , not sure what flange and if the housing is divided .

It would be interesting to know what turbine housing AMS uses (guessing T4) but they probably don't want to say .

If anyone has pics of these turbos particularly of the back showing the turbine/housing I would like to see them .

Cheers and thanks , Adrian .

Ang Wen Yan

AMS use T3.GT37R is basically a T3/T67.Flow to 75lb.There are some info on Supraforum.

TurboSpoolinIns

iTrader: (1)

It's so hard to go by because the guys on here are calling a few different turbos "37R's". I've seen ball-bearing 67mm/Ptrim, bb GT4067, or people using 3767's and calling them GT37's. Pretty much I just assume they're using some sort of a 67 with a variant on the exhaust wheel, then the "R" being bb.

JKav

iTrader: (8)

The only "real" Garrett GT37R turbos are the p/ns in the first post. Those are the Cummins stage upgrades, which all use the HP turbine (not UHP) on a divided T3 flange. Stage 1 uses a bespoke comp wheel, Stage 2 is BCI-18, Stage 3 shares its comp whl with GT4088R. These were engineered and are assembled in North America.

GT37R CHRAs share their center housing/bearing/locating pin/spacer/etc with the GT4088R.

Anything else is not a GT37R.

TurboSpoolinIns

iTrader: (1)

That's what I was trying to say but was just saying what people on here seem to call this "GT37R"-if that makes any sense.

I know his question seemed to be more so he could get to the bottom of what a "GT37R" is from these vendors and what people are actually using on this forum.

discopotato03

Hi Jay , I finally get to talk to the developer of the GT28RS - great turbo but OT .

I am very interested in these GT37R turbos because I'm guessing they fill the gap between the GT3582R and the GT4088R . I've been wondering if Garrett was going to do a GT turbine to replace the P trim in the TO4Z and 60-1/P trim version of the T3/T4 R series .

If possible can we be told turbine performance difference between this HP37 and the BB P trim . From what you say those Cummins Diesel upgrade turbos are a US development but could easily be a very useful addition to the performance petrol GT BB range .

Whats got me stuffed is exactly which turbine housings these GT37R's use . From the install PDF at the turbobygarrett.com site I can see the four mounting "ears" at the rear of the bearing housing sort of like the GT4088R's centre section has . I noticed the integral wastegate but have to ask if it bypasses both passages of the divided housing .

Can you tell us if Garrett would be prepared to machine up housings from the castings intended for the GT40 BB CHRA but profiled to suit the HP37 turbine ?

Cheers Jay and thanks for your time , Adrian .

discopotato03

Also curious about the "bespoke" 82mm 50 trim comp in the GT37R stage 1 .

I don't suppose its the wheel from CHRA no 700177-0009 .

Cheers Adrian .

Ang Wen Yan

GT37R mean this turbo(EVo comminuty):http://www.slowboyracing.com/more.php?id=4873& ,but with T3 housing.

discopotato03

No , that thing looks to be along the lines of a bush bearing TO4R .

As mentioned there are three compressor options of the REAL GT37R , which uses a 72.5mm 78 trim GT37 turbine . So in other word no T4 turbine (of any kind) and no 84mm 63 trim BCI8D (what Americans like to call "67" or "GT67") compressor wheel .

The part numbers (complete unit) are similar to the GT4088R and this seems to suggest it uses the big shaft ball bearing centre section common to the GT40R/GT42R and T51R families .


Cheers A .