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Garrett turbo question

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JLC

Probationary Member
15
0
May 20, 2016
Boise, Idaho
Hello all,
I have a Garrett turbo off a 7.3 powerstroke '92 I believe the guy said I bought it for 20 bucks at a swap meet checked it and felt great, however not knowing what it's life was like prior my ownership I had it rebuilt with the intent to use it on the 4G63. I am get a smaller hot side (.82 a/r now going to .63 a/r) to help spool characteristics but unsure of what figures I should be looking at all that I have found is that it's a T31 stage 3 wheel according to another forum.
the numbers are
p/n=1819744c91
s/n=wkl2842 tc4305
compressor a/r=.70
turbine housing a/r=.82 (as stated above plan to move to the .62 housing from atp)
main questions are what gt series is this turbo most comparable to? i.e. gt3071? not to sure so I figured I'd let the masters of the DSM world help me if they'd be so kind.
Thanks in advance
any and all input is appreciated
Jessie
 
That's a pre powerstroke turbo it probly off 93 or 94 idi 7.3 that's the only 2 years they came on. There not alot of parts or things to do with those turbos they were only used for about 7 psi stock on trucks witch is why it has a small turbine housing for a v8 diesel. I would sell it to guy that needs it for an idi and buy better suited turbo for your application. Just my 2 cents
 
Someone correct me if I'm wrong but didn't the power stroke turbos spin in reverse rotation making them unusable on our engines?
 
Hello all,
I have a Garrett turbo off a 7.3 powerstroke '92 I believe the guy said I bought it for 20 bucks at a swap meet checked it and felt great, however not knowing what it's life was like prior my ownership I had it rebuilt with the intent to use it on the 4G63. I am get a smaller hot side (.82 a/r now going to .63 a/r) to help spool characteristics but unsure of what figures I should be looking at all that I have found is that it's a T31 stage 3 wheel according to another forum.
the numbers are
p/n=1819744c91
s/n=wkl2842 tc4305
compressor a/r=.70
turbine housing a/r=.82 (as stated above plan to move to the .62 housing from atp)
main questions are what gt series is this turbo most comparable to? i.e. gt3071? not to sure so I figured I'd let the masters of the DSM world help me if they'd be so kind.
Thanks in advance
any and all input is appreciated
Jessie
Thats a GTP38. I have 3 of them laying around. Unfortunately,they had a pedestal thing for oiling and as a result are difficult to make work on DSMs. Also, notice the exhaust flange is circular and its that goofy V-band style thing. This means a custom or expensive manifold. Also I think these spin in the reverse direction compared to our turbos. Sell it and Buy a Holset. Job done
 
Last edited:
So I have done more digging on this turbo as much as I could really and what I have found is it's a T04B-H with a T31 turbine wheel. there are a couple of compressor maps online but not 100% sure if it's correct.
I have a link for the turbo in question, mine is identical to it.
It has a t3 flange but t4 back plate. it rotates the normal way (clockwise).
http://www.pureturbos.com/store/oem...744c91-1821328c91-1821329c91-466533-0001.html
 
also my build will be top mounted turbo so no block clearance issues
 
that bad huh? well i have a few different turbos laying around as well just wasnt sure what this (to4b-h) was capable of. no big loss. I have a billion parts from a ton and a half projects laying around.
 
power goals are around 300 to 350 whp for now. eventually upgrade to about 400-450 nothing extreme just a quick street and weekend warrior type of build. so I have to do it as reliably as possible.
I wasnt sure if this IDI turbo would have a better spool rate or better usable power band compared to the hx35w. the engine is a 2.4 4g64 RWD layout.
 
power goals are around 300 to 350 whp for now. eventually upgrade to about 400-450 nothing extreme just a quick street and weekend warrior type of build. so I have to do it as reliably as possible.
I wasnt sure if this IDI turbo would have a better spool rate or better usable power band compared to the hx35w. the engine is a 2.4 4g64 RWD layout.
If you're concerned about spool you're looking way in the wrong direction. 68HTA or an HY35 would be great options. Holsets will give some of the most useable powerband per size and flow of a turbo. Them and Borgs. The 68HTA is an excellent piece as well.
 
I just want spool around 4k to 7k-7.5k on the 2.4 if I am doing my math right and reading the compressor maps right the HX35 should be right.
But I am not opposed to being proven wrong. I am here to learn.
 
I just want spool around 4k to 7k-7.5k on the 2.4 if I am doing my math right and reading the compressor maps right the HX35 should be right.
But I am not opposed to being proven wrong. I am here to learn.
Ok great, why not spool sooner? The HY should spool faster than the HX and will pull all the way up there and make your power and they're easy to find, and cheap to rebuild , and durable. The HX will flow more but spool later. Cant go wrong with either though just throwing options out. The HX will leave more room to grow though

Thats a good mentality to have. Its why we have such a knowledgable and helpful community here.
 
bare with me, as I am still a rookie when it comes to turbo sizing and blade geometry... etc. the reason I am leaning toward the HX35 is because I already have one, my brother works at a Junk yard and gets first dibs off anything not being pulled and sold as a complete unit. long story short I have a vastly different selection of turbos but most are small (volvo, dsm 13g/14b) or huge (gt4082).
I would like spool sooner if achievable without sacrifice of top end (or at least as minimal as possible) so why does the HY spool faster but have the same characteristics? (HY35 I assume) just blade design or a/r differences?
and last but not least what would I look for that the HY came on?
 
bare with me, as I am still a rookie when it comes to turbo sizing and blade geometry... etc. the reason I am leaning toward the HX35 is because I already have one, my brother works at a Junk yard and gets first dibs off anything not being pulled and sold as a complete unit. long story short I have a vastly different selection of turbos but most are small (volvo, dsm 13g/14b) or huge (gt4082).
I would like spool sooner if achievable without sacrifice of top end (or at least as minimal as possible) so why does the HY spool faster but have the same characteristics? (HY35 I assume) just blade design or a/r differences?
and last but not least what would I look for that the HY came on?
http://www.dsmtuners.com/threads/holset-turbos-results-only-complete-installed-systems.313476/
The HY35s came on the auto versions of the 6BT. I'd do HX35 if I were in your shoes though.
 
Ok ill take that sound advice. and btw thank you for the very informative link
 
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