wc pulling advise
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=11160
Printed Date: 24 Jan 2025 at 12:44am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: wc pulling advise
Posted By: JM
Subject: wc pulling advise
Date Posted: 17 Apr 2010 at 1:50pm
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I have found a set of 15.5-38 tires and a set of 16-38 wheels. I am pulling in a 3 mph.class, should I even try to pull without lower gears? I know I will be idling until I get some slip. Or, should I put more into the engine,like stroking it out to 5 or 5.5 and run stock gearing?The engine is basicly a d17 build with some head improvments, I will pull in the 3500-4000 class. Thanks, JM
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Replies:
Posted By: mlpankey
Date Posted: 17 Apr 2010 at 2:15pm
Engine and more speed from taller tires. sled always wins never enough horsepower but kinetic energy helps.
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people if they don't already know it you can't tell them. quote yogi berra
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Posted By: KevinC(MD)
Date Posted: 17 Apr 2010 at 8:46pm
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My advice in a 3 mph class is WD45 type horsepower (stock) is sufficient as long as you are running 28 inch rubber. And I would run 28 inch rubber, here's why: it is much easier to find traction with short tires (23 degree, 26 vs. 28 inch, old vs. new tires, 13.6 vs 14.9 etc.) than it is to find the horsepower to make those big wheels turn. Sure, there's gearing changes (D17 diesel type) andstroker motors etc., but there is a lot to be said about the Allis set-up from the factory. 3mph is slow, and I can make 28 inch rubber stick to a track. I've recently switched to a 13.6 from a 14.9 (unheard of) and have had good results with a wide rim (no wider than tire) to get that tire to work. My experience with the short tire set-up began when I got my rear end handed to me by a WC with 26 inch combine rims and 14.9 /26 rubber. Hope this helps, but as always it is just a good hearted suggestion. When I'm suffering in the traction department, it is almost ALWAYS hitch height and length that was my mistake...not the tire size's disadvantage. Good luck and have fun.
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Posted By: Lonn
Date Posted: 17 Apr 2010 at 9:05pm
I agree with Kevin. Won many trophies with a bone stock D17 and 16.9x28 tires against hopped up Ollies and Deeres in the 6,500 and 7,500 lb classes as I didn't want to take the fluid out. Unlike the competition I actually used my tractor after the pulls. I would say that my old CO-OP tires were easier to find the traction with than the long bar short bar I replaced them with but I figured them out eventually. I stayed away from slippery gravel tracks and stuck to sticky clay or black dirt tracks.
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