Pulling Forum - Wd propane head?

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Wd propane head?

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=82508
Printed Date: 18 Apr 2024 at 12:23pm
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Topic: Wd propane head?

Posted By: Zaddison
Subject: Wd propane head?
Date Posted: 31 Dec 2013 at 1:26pm

A guy is wantin to sell me what he says is a head off of a propane wd. I know ih guys run lp heads for more power. But the allis head is flat so is there any difference in the lp compared to the gas. If so what would a good price.

Replies:

Posted By: Zaddison
Date Posted: 31 Dec 2013 at 1:29pm

I'm sure they just have taller pistons to bump the compression. What I was wondering if it had any bigger valves or flowed any better its going on a 37 wc I need a head so I may have to buy it either way. Thanks.

Posted By: DrAllis
Date Posted: 31 Dec 2013 at 1:48pm

Gas and LP heads on an A-C are all the same. That guy is full of it.

Posted By: 56allis_msu
Date Posted: 01 Jan 2014 at 1:27am

Allis doesn't build compression in the head. Allis builds compression in the cylinders correct Dr? Sounds like he's just trying to make money off of you.

Posted By: DrAllis
Date Posted: 01 Jan 2014 at 7:53am

If you take a D-17 and a 170 and a 175 OEM 4 inch Power Crater piston and lay them side by side, they are all exactly the same forging. The only difference is where they drill the piston pin hole in relation to the top of the piston. This is what gives the 7.25 to 1 or the 8.00 to 1 or the 8.25 to 1 compression ratio. The WD-45 piston is a little different (6.5 to 1) as the piston bowl is a little different than the others.