516 engine in a 7080 ever been done?
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=201357
Printed Date: 31 Oct 2024 at 9:28pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 516 engine in a 7080 ever been done?
Posted By: nickia
Subject: 516 engine in a 7080 ever been done?
Date Posted: 15 May 2024 at 10:18pm
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Has this ever been done? If so what mods and how would you keep it cool? im sure the rear end will handle it fine
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Replies:
Posted By: SteveM C/IL
Date Posted: 15 May 2024 at 10:50pm
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"the rear end will handle it".....what do you base that on? From what's been said on here over the years, the torque of the 516 will eat the rear end. Peterson has a video of a 516 in an 8000 chassis with a 7000 front sheet metal. It is dedicated to PTO work (cutting silage) which doesn't load up the rear end.
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Posted By: injpumpEd
Date Posted: 16 May 2024 at 7:35am
A 516 would be too slow for a 7080 rear end, you'd be back like a 190 with road gear at 13 mph lmao!
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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!
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Posted By: Unit3
Date Posted: 16 May 2024 at 8:04pm
That has been a dream of mine. The rear end and trans will take it and you will be the first to know when they won't. The cool meter, however, would peg out with that setup. It is a hot rod-ers dream to put a big engine in a classic '32 Ford.
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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Posted By: DrAllis
Date Posted: 16 May 2024 at 8:31pm
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I have an engineering report written up by A-C telling about the design and development of the 7080 tractor. One of the things they said was the engine speed was increased to 2800 RPM to help the input shafts of the transmission handle the increased torque of the 3750 engine. So, they must have felt the transmission input area was borderline weak, so the engine speed was increased to deal with that weakness. A 516 engine at 2400 RPM and 50 more HP could be a problem if used to the engines max output all the time. Not my opinion, but the opinion of A-C's tractor driveline engineers.
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