Farm Equipment -Knowledge Base - To4b80 Turbo questions

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To4b80 Turbo questions

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment -Knowledge Base
Forum Description: Long term storage of technical article, etc
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=200377
Printed Date: 22 Nov 2024 at 9:10pm
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Topic: To4b80 Turbo questions

Posted By: studer automotive
Subject: To4b80 Turbo questions
Date Posted: 18 Mar 2024 at 3:07pm

I’m looking for a PN for a replacement to4b80. I came up with a 313099 PN off a borg Warner turbo , which replaced a tob490, which I believe is a replacement turbo for a d21 or 210/220. Im installing it on a d19 D so that’s entirely to big. Anybody have any input on this?

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a-c 185-d y/r cab turbo soon
99 f-250 7.3 4x4
86 mustang5.0 owned since 8/93

Replies:

Posted By: DrAllis
Date Posted: 18 Mar 2024 at 9:57pm

It's been 45 years, but I'm pretty sure the D-21 and D-19 used the SAME turbo, which was a Thompson brand which later became a Rajay. I always thought that was interesting, but that D-262 couldn't stand much boost and the bigger size was just what it took to keep boost relatively low.

Posted By: studer automotive
Date Posted: 18 Mar 2024 at 10:59pm

Interesting, I have a ray-junk turbo on my 19 now i’m looking to replace it with a b-w or garret. I found brand new borg Warner turbos for $450-$500. Thanks for the info dr.

-------------
a-c 185-d y/r cab turbo soon
99 f-250 7.3 4x4
86 mustang5.0 owned since 8/93