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jebbach911's Avatar
 
Join Date: Dec 2007
Location: Paducah, KY.
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Something very odd about that turbine housing, not any Garrett casting I've ever seen.
Also, there's no such thing s a GT35R with different wheels -- if you don't have a GT35R compressor wheel and a GT35R turbine wheel, it's not a GT35R (GT3582R).
Take a photo of the ID tag on the center bearing housing.
I've seen some pretty good fakes, and if you know what you're looking at you can spot the differences.
The GT35R is not that big a turbocharger, and on a 3.3L with bolt-ons it performs absolutely great.
Email me and I'll give you a lit of the other pieces you'll need to finish up the installation.
Chris, thanks for any help or input you can give me. Here are the pics of the main bearing housing and the only cast identifiers on the turbo. If this turns out to be a chinese copy of a Garrett I won't be using it.














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1976 911s,2.7, Cobalt blue, G 40 cams, Weber 40 IDA, SSI / Dansk, MSD 6AL
1991 964 Turbo,3.3 ,Polar silver, Fabspeed headers and exhaust, stock W/G, Greddy EBC, Synapse BOV, BL WUR w/ RPM CSV switch, CIS Fuelhead mods, GT 35 Turbo, Snow W/Meth Inj., K&N Cone Air Filter, AAR delete, Decel valve delete, Zeitronics ZR-2 AFR
1994 968 White, bone stock! (son's first car)
Old 08-21-2011, 08:46 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #41 (permalink)
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I believe that this is the same housing manufacturer, looks identical.
T3 T4 GARRETT Type New Turbo Center Bearing Housing | eBay
Does not appear to be a brand name manufacturer(name not given by seller, but part placed next to a Garrett box/misleading), just manufactures replacement parts for brand name turbos.
Old 08-21-2011, 12:26 PM
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Quote:
Originally Posted by JBL930 View Post
Chris, i was told the GT35r was a 500bhp turbo at 1.0, i know cams play a part among other stuff, but is this not the case? What should the turbo give on a 964 with bolt ons? How does it compare to a HF2?
With camshafts, the usual bolt-ons (headers, muffler, intercooler) and proper tuning, I'd agree with that statement.

Some chassis dyno results for GT35R turbos near 1.0bar boost, 91-octane pump gas:
* 3.6T with EFI = 472rwhp/466rwtq @ 1.0bar
* 3.4T with EFI = 420rwhp/387rwtq @ 0.9bar
* 3.4L with CIS = 420rwhp/407rwtq @ 1.0bar
* 3.6T with EFI = 494rwhp/460rwtq @ 1.0bar
* 3.2L with EFI = 424rwhp/365rwtq @ 1.0bar

Engine dyno result from a client in England tuning his 3.3L C2T with Motec:
1.0= 450hp
1.2bar= 500hp (499.7hp)
1.1bar @ 3,000rpm

Can't give apples-to-apples comparison to the HF2 because we don't run the K27-based hybrids anymore. In our experience, there's too much to gain when you get away from the K27 turbine wheels and housings.
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Old 08-22-2011, 09:26 AM
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Originally Posted by jebbach911 View Post
Chris, thanks for any help or input you can give me. Here are the pics of the main bearing housing and the only cast identifiers on the turbo. If this turns out to be a chinese copy of a Garrett I won't be using it.
That's not a GT3582R. Garrett casts just 1 style center bearing housing, and it includes M14x1.5mm coolant ports (doesn't matter if used or not, all housings have them).
I think I even know who made it (by the comp back plate style) but the machining looks a little less detailed than his usual work.
That looks like an "E" cover, 3" inlet/2" outlet, and 0.60A/R.

That's some journal bearing turbocharger, and a couple of quick measurements should confirm the specs:
* compressor wheel inducer (small inlet diameter)
* turbine wheel exducer (small outlet diameter)
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Old 08-22-2011, 10:19 AM
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Quote:
That looks like an "E" cover, 3" inlet/2" outlet, and 0.60A/R.

That's some journal bearing turbocharger, and a couple of quick measurements should confirm the specs:
* compressor wheel inducer (small inlet diameter)
* turbine wheel exducer (small outlet diameter)
Chris,
You are correct, it is a 3" inlet/ 2" outlet - .60 A/R

The compressor wheel inducer size is 61.39 mm (2.417")

The turbine wheel exducer size is 63 mm (2.48")

Quote:
I think I even know who made it (by the comp back plate style) but the machining looks a little less detailed than his usual work.
Who do you think made this turbo? Or would you rather not say on the interwebs? If not, I've sent you an e-mail requesting parts to finish, you can send me the info then.



Thanks for your help!!
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1976 911s,2.7, Cobalt blue, G 40 cams, Weber 40 IDA, SSI / Dansk, MSD 6AL
1991 964 Turbo,3.3 ,Polar silver, Fabspeed headers and exhaust, stock W/G, Greddy EBC, Synapse BOV, BL WUR w/ RPM CSV switch, CIS Fuelhead mods, GT 35 Turbo, Snow W/Meth Inj., K&N Cone Air Filter, AAR delete, Decel valve delete, Zeitronics ZR-2 AFR
1994 968 White, bone stock! (son's first car)

Last edited by jebbach911; 08-22-2011 at 01:49 PM..
Old 08-22-2011, 01:47 PM
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That's a GT35R compressor wheel (61mm) with a Garrett Stage-V turbine wheel. The exhaust wheel flows well -- slightly more total flow capacity than the GT35R turbine wheel -- but isn't as responsive. The compressor will flow the same 62#, or approx. 620hp all in.
I forwarded your photos to the builder, he confirmed it's one of his.
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Old 08-22-2011, 04:18 PM
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Why all the secrets surrounding the builder and his billet backing plate???
Old 08-23-2011, 11:03 AM
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Originally Posted by E-man930 View Post
Why all the secrets surrounding the builder and his billet backing plate???
It makes it so much cooler with all the intrigue!!!
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Old 08-23-2011, 11:13 AM
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Well the center housing is Garrett, see the "A" for Airesearch. They've been making that housing for close to 40 years. You see the same on old John Deere tractor turbos.

Nothing secret about this other than the fact it's assembled from a collection of long existing Aireseach/Garrett/Honeywell aftermarket components. Oh, and what is with that cheezy compressor bullet? The bullet is what made me think some cloning Chinese outfit made it.

Sorry, I hope you did not pay top dollar for this one. It's worth about $350.
Old 08-23-2011, 01:04 PM
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Originally Posted by copbait73 View Post
Oh, and what is with that cheezy compressor bullet? The bullet is what made me think some cloning Chinese outfit made it.
MODE machines cheesy billet aluminum components?

Quote:
Originally Posted by copbait73 View Post
Sorry, I hope you did not pay top dollar for this one. It's worth about $350.
If it was an eBay knock-off, that's over-paying! :-)
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Old 08-23-2011, 01:18 PM
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Quote:
Originally Posted by TurboKraft View Post
MODE machines cheesy billet aluminum components?



If it was an eBay knock-off, that's over-paying! :-)
Don't know MODE but I know Airesearch/Garrett/Honeywell, Schwitzer/Borg Warner and Schwitzer/Holset and we didn't put cheezy bullets on the nose of compressor wheels.
Old 08-23-2011, 01:37 PM
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Well atleast the billet compressor backing plate secret it out.
I wasn't sure how much longer I could keep from spilling the beans!
If MODE makes backing plates that are cheesey than I wish my whole car was a block of MODE cheese!

Last edited by E-man930; 08-23-2011 at 03:12 PM..
Old 08-23-2011, 03:09 PM
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;-) e-Man!
Yeah, Bob makes the backing plates, and the comp nuts, and tons and tons of turbine housings for Garrett. He's got a first rate machining operation.
That turbo was built by Turbos Direct, one of Garrett's master distributors. That combination had the nickname "Blowzilla."
Does the aero nut help? Unless the mass is such that it increases the rotating assembly's moment of inertia, I don't think it hurts. We've got 930s out there for years, no issues, so I don't see a negative effect on reliability.
We've done 595rwhp on 100-octane on a 3.5L 930 (flat manifold) with that Stage-V turbine wheel, 0.82A/R T31housing, and a larger compressor wheel. It'll flow.
The flow of the GT35R comp wheel has been covered before.
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Old 08-23-2011, 03:21 PM
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Yup - they make that same turbo for the 350Z... hmmm 3.5 liter six... hmmm.
I should have spilled the beans earlier!

Last edited by E-man930; 08-23-2011 at 03:29 PM..
Old 08-23-2011, 03:22 PM
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Quote:
i think you should run the turbo!
i am!!:d
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1976 911s,2.7, Cobalt blue, G 40 cams, Weber 40 IDA, SSI / Dansk, MSD 6AL
1991 964 Turbo,3.3 ,Polar silver, Fabspeed headers and exhaust, stock W/G, Greddy EBC, Synapse BOV, BL WUR w/ RPM CSV switch, CIS Fuelhead mods, GT 35 Turbo, Snow W/Meth Inj., K&N Cone Air Filter, AAR delete, Decel valve delete, Zeitronics ZR-2 AFR
1994 968 White, bone stock! (son's first car)
Old 08-23-2011, 08:01 PM
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