Turbine housing question.
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FTE Leadership Emeritus
Joined: May 2001
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From: Cabot, Arkansas
Turbine housing question.
Did we ever decide if all the housings are interchangeable or not? i.e will the stock 1.15 from a 94-97 turbo fit a 99-03 or -38r? I've looked at pretty much every picture I could find on the internet and they all look the same.
And with that in mind. Could a person use a stock 94-97 EBPV housing instead of the adapter? It uses the same three bolt flange.
And with that in mind. Could a person use a stock 94-97 EBPV housing instead of the adapter? It uses the same three bolt flange.
Elder User
Joined: May 2008
Posts: 860
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From: Liberty Lake, WA
I don't believe they are interchangeable.
I think it would probably bolt on, but the exhaust wheels are different sizes and would rub. IIRC, the up pipes are different in that some have the babies butt, some don't.
I think it would probably bolt on, but the exhaust wheels are different sizes and would rub. IIRC, the up pipes are different in that some have the babies butt, some don't.
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FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Originally Posted by SuperDoodie
but the exhaust wheels are different sizes and would rub.
Elder User
Joined: May 2008
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From: Liberty Lake, WA
A stock turbo GT38 is 80mm wheel, a 38R is 88mm.
Post Fiend
Joined: Jun 2004
Posts: 9,293
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From: Parker, CO
Actually I did find out just the other day. The 38 and the 38R share the same exhaust wheel, and the turbine housings are interchangable.
Compressor wheels are different, so the compressor housings are not interchangable.
As for the van turbo, I'm not 100% sure. I think JTHarvey found out a while back that the van turbo does use a different turbine wheel than the SD turbo.
Compressor wheels are different, so the compressor housings are not interchangable.
As for the van turbo, I'm not 100% sure. I think JTHarvey found out a while back that the van turbo does use a different turbine wheel than the SD turbo.
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FTE Leadership Emeritus
Joined: May 2001
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From: Cabot, Arkansas
Right. I knew the intake wheels were different.
I used to have a Garret PDF that showed the all the specs for all three turbo's. Actually I still have the link, but it doesn't work any more. Evidently Garrett dropped it from their site some time ago.
The only snippit of information that I've found so far is a seven year old post in which a Garrett tech at the time said that the "early" 99 van turbo has a "slightly" larger turbine wheel....and in another post it was referenced as 64.25mm vs. 64mm. I wonder if the clearance in the housings is really so tight that 1/4 of one millimeter really makes a difference.
I used to have a Garret PDF that showed the all the specs for all three turbo's. Actually I still have the link, but it doesn't work any more. Evidently Garrett dropped it from their site some time ago.
The only snippit of information that I've found so far is a seven year old post in which a Garrett tech at the time said that the "early" 99 van turbo has a "slightly" larger turbine wheel....and in another post it was referenced as 64.25mm vs. 64mm. I wonder if the clearance in the housings is really so tight that 1/4 of one millimeter really makes a difference.
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FTE Leadership Emeritus
Joined: May 2001
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From: Cabot, Arkansas
Originally Posted by Pocket
The 38 and the 38R share the same exhaust wheel, and the turbine housings are interchangable.
Reason I'm asking is there is a chance I can get an OBS turbo.....and I really want to be able to use the housing off of it.
I have noticed that a few sources are selling .84 housings as upgrades for the OBS turbo, which leads my to believe that all of them will interchange.....possibly excepting the van turbo.
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Post Fiend
Joined: Feb 2007
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From: Dallas-Ft. Worth
I'm relatively sure the OBS turbos have a square input flange where ours are round. I don't think they're interchangeable even if the wheels are the same.
On the van turbos, the "rumor" is that the exhaust wheels are different, but I couldn't tell any difference at all having them side-by-side. They both fit in either housing when I had mine apart.
On the van turbos, the "rumor" is that the exhaust wheels are different, but I couldn't tell any difference at all having them side-by-side. They both fit in either housing when I had mine apart.
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