Dyno tests
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=201144
Printed Date: 14 Jun 2024 at 4:26pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Dyno tests
Posted By: Acguywill
Subject: Dyno tests
Date Posted: 02 May 2024 at 9:33am
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Not really wondering about tractor pulling but just general differences between rated hp and dynoed power. Dad's second 8070 was power hopping really bad when he bought it new in 84. When he traded it on a new one a year or so later they threw it on the dyno and I think it was putting out 205 hp. Was this common? We traded the third 8070 on an agco 9695 rated at 195hp. It has always run hot when you work it. As in glowing manifold and light coming out of the exhaust stack. We had it dyno tested and it was putting out 265hp on winter diesel. So almost 50% more than it should have been if you add on the difference for summer fuel. Had the engine turned down a bit but the damage was done. Ended up rebuilding it at a little over 6000hrs. The tops of the pistons had started to deform and pieces of carbon were imbeded in them. Still have the tractor but don't use it much anymore. Both the tractors were stock and fuel pump seals were intact. Just curious if this was common back in the days before computers controlled everything on engines.
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Replies:
Posted By: DrAllis
Date Posted: 02 May 2024 at 1:31pm
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M & W dyno's (older models) tended to read 20 to maybe 30 HP high on a 170 HP tractor, so the 8070 wasn't too terribly hot by that 205 number.
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