turbo question
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=24579
Printed Date: 24 Feb 2025 at 3:02am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: turbo question
Posted By: dustinmo
Subject: turbo question
Date Posted: 23 Jan 2011 at 9:39pm
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I need a T04B90 turbo for my d-21 I found one that the guy says is an aftermarket one for gm vehicles but the model # is T04B90 and it is considerably cheaper than one for the 21 do you guys think that it would be the same one, it looks like the right one but you tell me based on what I have told you, Thanks, Dustin
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Replies:
Posted By: Hurst
Date Posted: 23 Jan 2011 at 9:51pm
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Be careful of the cheap chinese knockoffs. I've heard some horror stories about those.
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: dustinmo
Date Posted: 23 Jan 2011 at 10:05pm
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this is an actual air research to4b it was bought for a preformance upgrade kit for gm vehicles and the guy now wants to sell it with alot of the other stuff
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Posted By: Hurst
Date Posted: 23 Jan 2011 at 10:08pm
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I remember reading on a couple of forums when I was looking for a T04b80 for my 7000 that people liked it for 350 small blocks, so it is possible that the T04b90 is also used for gas engines and exact same turbo as your tractor needs, maybe reclocked for the oil outlets to work right. If that's the case, be careful and make sure you can reclock it without breaking off any bolts. If you can get the part number off of it and get it to a garret dealer, they should be able to give you more details.
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: dustinmo
Date Posted: 23 Jan 2011 at 10:11pm
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what is the difference between the or what does the 80 and 90 mean
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Posted By: Hurst
Date Posted: 23 Jan 2011 at 10:17pm
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I think the 301 turbo has a smaller exhaust housing and compressor housing to account for the lower volumetric flow. Without a map for the two turbos, it's hard to say how much they differ, but generally, the 90 is going to made to flow more air on both sides. Not sure if the air ratio is different or not.
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: JC-WI
Date Posted: 23 Jan 2011 at 11:06pm
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You need the 90, the 80 fits the 301 engines, a 90 on a 301 would take to long to spool up. watch out for exhaust elbow mount, some are just a clamp method while the tractors requires ex. turbine housing to have 4 bolt connection for the elbowto bolt to.
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Posted By: dustinmo
Date Posted: 23 Jan 2011 at 11:55pm
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I have seen that on quite a few but this one has the correct 4 bolt flange
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Posted By: Bryan
Date Posted: 24 Jan 2011 at 5:50am
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Should work. Chevy never used air research on their trucks. They used ihi turbos made in Shelbyville, Illinois. I've been working their for over 15 yrs. You can always use your turbine housing and elbow.
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Posted By: DrAllis
Date Posted: 24 Jan 2011 at 5:57am
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If the tag actually says TO4B90 AND the exhaust housing A/R number is .96, I'd say use it. It will need to have the center section and compressor housings rotated, but that's easily done.
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Posted By: Hurst
Date Posted: 24 Jan 2011 at 2:38pm
Just be careful when loosening the clamp bolts around the exhaust housing. I took my old turbo apart and every one of them snapped off. I didn't soak them, as I needed a new exhaust housing at the least, but just be careful, they broke pretty easily.
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: dustinmo
Date Posted: 24 Jan 2011 at 6:06pm
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It is a brand new turbo and the guy says the tag says it is a borg warner part # 313099 model t04b90 and .96 AR
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