cummins turbo???
10-27-09, 08:28 PM
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cummins turbo???
anyone ever use a cummins turbo??? Part number 3032058..bought it remanufactured for 320 bucks the guy said it was a garrett..but its a cummins. just want to find out about it before i get my money back....bought it on ebay...thank got for paypal. it is one big *** turbo about 50 pounds
10-28-09, 04:52 AM
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If it is a really big turbo, then it will not work very well with the 13B engine due to severe lag and possibly even compressor stall issues. If you look at the compressor map in the below link, you will see a surge line and a choke line. The surge line shows where a given turbo will stall out because the compressor is sized too large for the engine. This is actually worse than operating past the choke line, which is the problem you would have with a turbo that is sized too small. The important thing to learn from this is that the CORRECT turbo size is what you want for a car.
http://www.turbobygarrett.com/turbob...o_tech103.html
I recommend that you spend $20-25 on a good turbo book before you spend another $320 or more on a turbocharger. I have not read it yet, but "Turbo: Real-World High-Performance Turbocharger Systems" by Jay K. Miller looks pretty good.
http://www.amazon.com/Turbo-Real-Wor...Turbocharger-S
Also, there is the classic "Maximum Boost" by Corky Bell, although it showcases the old cfm compressor maps as opposed to the new lbs/min maps.
http://www.amazon.com/Maximum-Boost-...ng-Performance
http://www.turbobygarrett.com/turbob...o_tech103.html
I recommend that you spend $20-25 on a good turbo book before you spend another $320 or more on a turbocharger. I have not read it yet, but "Turbo: Real-World High-Performance Turbocharger Systems" by Jay K. Miller looks pretty good.
http://www.amazon.com/Turbo-Real-Wor...Turbocharger-S
Also, there is the classic "Maximum Boost" by Corky Bell, although it showcases the old cfm compressor maps as opposed to the new lbs/min maps.
http://www.amazon.com/Maximum-Boost-...ng-Performance
10-28-09, 05:23 AM
#5
Im not sure on the above saying about compressor stall, and rotaries work well with big *** turbos, but this is a big one so no good unless you want big power.
If I remember right its a Rotomaster ST50 turbo, IIRC 74mm inducer, .97 a/r, T6 frame.
Its a biggun off the huge Mack trucks etc.
Its about the size of a GT4202, and with a fairly sensible sized exhaust too for a big power rotary.
There were VNT versions too, I cant remember if that part number is one of them or not though, but would be obvious by looking at pics.
If I remember right its a Rotomaster ST50 turbo, IIRC 74mm inducer, .97 a/r, T6 frame.
Its a biggun off the huge Mack trucks etc.
Its about the size of a GT4202, and with a fairly sensible sized exhaust too for a big power rotary.
There were VNT versions too, I cant remember if that part number is one of them or not though, but would be obvious by looking at pics.
Last edited by StavFC; 10-28-09 at 05:28 AM.
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10-28-09, 11:54 AM
#9
Smaller than I thought...
That is an undivided T4 flange.
4in inlet but much smaller wheel.
I thought it was a ST50 but it might be smaller.
Without seeing it in the flesh to check for a turbine a/r number (though IIRC they all just under 1.00 a/r), and to remove the comp housing and check compressor inducer diameter, you cant be sure.
But yeah, its off a diesel, like 99% of all turbos originate from in one form or another, despite what many thing.
Looks an interesting piece, and not THAT big, but without knowing what you want from your engine or for the spec, never mind having more turbo size details, I cant say much more!
That is an undivided T4 flange.
4in inlet but much smaller wheel.
I thought it was a ST50 but it might be smaller.
Without seeing it in the flesh to check for a turbine a/r number (though IIRC they all just under 1.00 a/r), and to remove the comp housing and check compressor inducer diameter, you cant be sure.
But yeah, its off a diesel, like 99% of all turbos originate from in one form or another, despite what many thing.
Looks an interesting piece, and not THAT big, but without knowing what you want from your engine or for the spec, never mind having more turbo size details, I cant say much more!
10-28-09, 02:53 PM
#11
Well thats the thing, without knowing what the compressor inducer is for sure, and what the turbine a/r is for sure, we cant be sure what it is!
It sure as hell looks like a .97 turbine 74mm inducer ST50, which is like a GT4202 really, much bigger than a 35, more like a 600@wheels turbo than a 375bhp one, but would give good power from 4500 upwards quite nicely still from what ive seen of 4202s on 13Bs. They usually T6 and bigger a/r which should spool a little slower, but this is a undivided housing, so it would probably even itself out from that point of view.
But I couldve swore ST50s were T6 flange, and that things T4 flange, so maybe the thing above is a smaller one in the series, or I just remember wrongly, its been a while.
Great turbo for the cash still IMO, but might be a bit OTT for your application.
Personally id take off the comp housing and measure the inducer diameter, check the housing for the a/r number (may be on the inside of the inlet flange), and decide then, as it may either be a bit smaller than an ST50 and therefore perfect, or an ST50, and though a bit big it would still work...
It sure as hell looks like a .97 turbine 74mm inducer ST50, which is like a GT4202 really, much bigger than a 35, more like a 600@wheels turbo than a 375bhp one, but would give good power from 4500 upwards quite nicely still from what ive seen of 4202s on 13Bs. They usually T6 and bigger a/r which should spool a little slower, but this is a undivided housing, so it would probably even itself out from that point of view.
But I couldve swore ST50s were T6 flange, and that things T4 flange, so maybe the thing above is a smaller one in the series, or I just remember wrongly, its been a while.
Great turbo for the cash still IMO, but might be a bit OTT for your application.
Personally id take off the comp housing and measure the inducer diameter, check the housing for the a/r number (may be on the inside of the inlet flange), and decide then, as it may either be a bit smaller than an ST50 and therefore perfect, or an ST50, and though a bit big it would still work...
10-28-09, 08:21 PM
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Yeah, looks more like 25 lbs vs. 50 lbs. However, it looks about the same size as a Y2K turbo, which is way too large for a 375hp 13B.
Looks like a T6 to me.
T46/ST50 maybe?
Looks like a T6 to me.
T46/ST50 maybe?
10-29-09, 05:22 AM
#16
Look at the pics, 2inch by 3inch flange, its T4 
It's not that big by looks of it, GT42 size at most, in fact frame size it looks a little smaller to me, but hard to tell. Its still a T4 framed turbo.
You will be surprised what you can fit to be honest, I got this T6 GT47 sitting flush on my FC manifold without it hitting anything at all, would just need to swap the flange to a T6 one and away I go.
And mines RHD so less room than LHD cars
You will be surprised what you can fit to be honest, I got this T6 GT47 sitting flush on my FC manifold without it hitting anything at all, would just need to swap the flange to a T6 one and away I go.
And mines RHD so less room than LHD cars
10-29-09, 02:08 PM
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^^^^^^^what the hell are you doing with that big *** turbo?? damn....
yeah I found out today its a T6 flange...and its going back cause its not a garrett its a cummins...thanks for your help guys...
yeah I found out today its a T6 flange...and its going back cause its not a garrett its a cummins...thanks for your help guys...
10-29-09, 04:16 PM
#18
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Flanges are measured by the bolt pattern. 
No way, that thing is a T6 monster. Compare with the Y2K dimensions:
http://www.turboneticsinc.com/turbo_dimensions
http://www.turboneticsinc.com/turbo_dimensions
10-29-09, 04:47 PM
#19
Apologies, I was talking from a performance point of view rather than a fitment point of view. It has a T4 turbine inlet, far smaller hole than a T6 one (which equals about the same as 3.5" round pipe, nealry an inch more than the T4 hole like this turbo), but you are totally right, T6 style bolt spacing.
Makes it an extra pain in the **** as 99% of T6 flanges youd buy would leave you with a restrictive step between manifold and turbo
Either way, he not using it now, lol
Makes it an extra pain in the **** as 99% of T6 flanges youd buy would leave you with a restrictive step between manifold and turbo
Either way, he not using it now, lol
10-29-09, 04:55 PM
#20
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Look at the pics, 2inch by 3inch flange, its T4
It's not that big by looks of it, GT42 size at most, in fact frame size it looks a little smaller to me, but hard to tell. Its still a T4 framed turbo.
You will be surprised what you can fit to be honest, I got this T6 GT47 sitting flush on my FC manifold without it hitting anything at all, would just need to swap the flange to a T6 one and away I go.
And mines RHD so less room than LHD cars
It's not that big by looks of it, GT42 size at most, in fact frame size it looks a little smaller to me, but hard to tell. Its still a T4 framed turbo.
You will be surprised what you can fit to be honest, I got this T6 GT47 sitting flush on my FC manifold without it hitting anything at all, would just need to swap the flange to a T6 one and away I go.
And mines RHD so less room than LHD cars
10-30-09, 05:23 AM
#23
WofW- If you mean my car, battery is in the boot? The braided line you see is to the ISCV and is far further away from anything dangerous than it looks in the pics. And BOV came from japan there (technically the ideal place to minimise off throttle compressor surge tho), and now is somewhere else- in the trash.
Revvin7- Its 100% T4 hole, just with wider bolt spacing, and I also agree the turbo just doenst look that big like others have said, Its a 4in inlet and its necked in hugely to the inducer. Even if its a GT42 size (ie ST50) its useable on a 13B if you want big power, but as you say, looks smaller.
Pretty certain the turbine a/r is under 1 on these too so spool should be ok.
Has the OP got the details of the orignal seller? At that price I might have it off him, lol
Revvin7- Its 100% T4 hole, just with wider bolt spacing, and I also agree the turbo just doenst look that big like others have said, Its a 4in inlet and its necked in hugely to the inducer. Even if its a GT42 size (ie ST50) its useable on a 13B if you want big power, but as you say, looks smaller.
Pretty certain the turbine a/r is under 1 on these too so spool should be ok.
Has the OP got the details of the orignal seller? At that price I might have it off him, lol
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