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=208681
Printed Date: 25 Jan 2026 at 11:34am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: turbo question
Posted By: Kevin210
Subject: turbo question
Date Posted: 26 Oct 2025 at 7:42pm
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Is there a direct bolt on replacement turbo for to3 air research turbo on a 220/210 besides another one. One that is bigger say like a switzer 3lm 466 0r similar. |
Replies:
Posted By: DrAllis
Date Posted: 26 Oct 2025 at 8:22pm
| The next logical step up in a 210-220 Air-Research turbo is a very small step, but nevertheless is configured to replace the old T0-4 V-band clamp compressor housing. Any Air-Research brand turbo that fits a 7030-40-45-50-60 will bolt right on and the exhaust will come out thru the hood in the same place. Now, don't think you're going to do this with a USED turbo. The 7000-series turbo must be "clocked" to fit backwards on the engine and you'll never get that accomplished on a used unit. So, go with a reman or new. Anything for even more performance has an off-center turbine shaft and will require everything to be different/changed including the hole in the hood unless you can fab up an elbow to meet the hood hole. |
Posted By: Kevin210
Date Posted: 26 Oct 2025 at 8:46pm
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So what does clocked mean Dr,that's above my knowledge. |
Posted By: DrAllis
Date Posted: 26 Oct 2025 at 9:15pm
| If you take any turbo and mount it around bass-ackwards, the oil lines and compressor outlet won't be aimed at where they now need to be. The center section and compressor housing need to be rotated (clocked) to get things pointed where they need to be. Unfortunately, the bolts on the exhaust housing will be rusted in place. The center section will be rusted in place. All this due to the exhaust heat over the years of use. Some turbos will be impossible to clock. Some might not be too bad with an experienced person and a torch to heat things. Just don't plan on it. |
Posted By: injpumpEd
Date Posted: 27 Oct 2025 at 8:14am
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There is no direct bolt on turbo that is larger for performance that will fit these early AC engines. Anything you put on will require modifications, and likely a new hole in the hood. Once I finally bit the bullet and did it, it was the best thing I could have done. We need to quit worrying about not cutting the hood. An S200 or S300 works very well, depending on the application and fuel system. ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: SteveM C/IL
Date Posted: 27 Oct 2025 at 8:42am
| Yeah before I knew it was "wrong" I cut an oval hole in 220 hood to use a 7030 muffler. No easy task! That hood ain't no sheet metal! |
Posted By: injpumpEd
Date Posted: 27 Oct 2025 at 9:10am
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I figure out exactly where stack will be, then use a hole saw. If I was making an oval hole on a 210/220, I'd use a hole saw at each end, then just use the jig saw to connect the 2 holes. I also have a cordless steel cutting circular saw, that cuts like butter, but only straight lol! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: DrAllis
Date Posted: 27 Oct 2025 at 9:22am
| Farmall must not have had the hood-hole-cutting technology that others had !! The always had the oval part above the hood line !!! |
Posted By: IBWD MIke
Date Posted: 28 Oct 2025 at 7:05am
Or maybe their engineers were just that much more frugal knowing that cutting a small round hole was cheaper than a large oval?
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DrAllis wrote:Posted By: Kevin210
Date Posted: 30 Oct 2025 at 10:35pm
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Thanks Doc. I also watched some you tube videos and seen what they were doing. One tractor does have a new turbo that I am restoring so it shouldn't be a problem. The other tractor has had the turbo for 3 years and only used for pulling so it may be a chore to get turned. |