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LP vs stock head 12hp puller?


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#1 Newbetter OFFLINE  

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Posted August 29, 2015 - 03:31 PM

Anyone have experience with both? The class is 12hp stock. Thanks for any help.



#2 LilysDad ONLINE  

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Posted August 29, 2015 - 04:34 PM

Have you read Brian Millers web site? This is his info on the different heads.  http://gardentractor...com/cylhead.htm



#3 Newbetter OFFLINE  

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Posted August 29, 2015 - 04:45 PM

Thank you for that link. It seems it would be better to have the higher compression but the lp head doesn't flow well?



#4 boyscout862 ONLINE  

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Posted August 29, 2015 - 05:22 PM

Welcome to GTT. Relax and enjoy the site. Good Luck, Rick



#5 Newbetter OFFLINE  

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Posted August 30, 2015 - 07:22 AM

Forgot to mention we run at 4200rpm if that matters with the heads.



#6 Dieselcubmike OFFLINE  

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Posted August 30, 2015 - 09:18 AM

Its going to help a lot more compression means more power. Are you allowed to port and polish?



#7 Newbetter OFFLINE  

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Posted August 30, 2015 - 09:43 AM

Rules say block- stock no alterations so I'm thinking no. We are stock, no where near the power some have. Think it's one of those clubs that people know whats going on but no one says anything.



#8 LilysDad ONLINE  

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Posted August 30, 2015 - 12:15 PM

I would assume(yes, I know) that you would be allowed to mill the heads a certain amount for truing. You noticed in the Brian Miller story there is more than one LP head. Styles 2&3 are better. Which one do you have?



#9 Newbetter OFFLINE  

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Posted August 30, 2015 - 02:35 PM

The one I have is part # 235461 has that kind of heart shape with material between the valves. Can see how that extra material doesn't help flow around the valves. Also have what he is calling the 4th gen head, with the plug over the ex valve,  going to get it milled and try it out. Did a comp test with each head today. The lp was 95 and the uncut 4th gen was 80, will check the 4th gen again after milling this week I hope. Thinking of going to a 30 carb also, can get aftermarket pretty cheap.



#10 Newbetter OFFLINE  

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Posted August 30, 2015 - 03:11 PM

After writing that and thinking, those comp numbers seem kinda low. Did a quick search but everything I came up with mentioned the acr and couldn't find what it should be. I backed the ex adjuster off before the test.



#11 LilysDad ONLINE  

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Posted August 30, 2015 - 04:54 PM

I can't vouch for it, but I've been told if you turn the engine over backwards, it cancels out the acr.



#12 TAHOE ONLINE  

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Posted August 31, 2015 - 11:27 AM

Rules say block- stock no alterations so I'm thinking no. We are stock, no where near the power some have. Think it's one of those clubs that people know whats going on but no one says anything.

 

What part of the state?



#13 Newbetter OFFLINE  

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Posted August 31, 2015 - 05:31 PM

NE Ohio






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