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Wd propane head?
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Zaddison View Drop Down
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Joined: 19 Sep 2013
Location: Moweaqua il.
Points: 174 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Zaddison Quote  Post ReplyReply Direct Link To This Post Topic: Wd propane head?
    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.
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Zaddison View Drop Down
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Joined: 19 Sep 2013
Location: Moweaqua il.
Points: 174 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Zaddison Quote  Post ReplyReply Direct Link To This Post 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.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 20398 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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56allis_msu View Drop Down
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Joined: 22 Oct 2013
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Points: 132 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 56allis_msu Quote  Post ReplyReply Direct Link To This Post 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.
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DrAllis View Drop Down
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Points: 20398 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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