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Tractor Pulling Discussion Forum

looking for man that bore out 70 lp. for ap143

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shotgun

06-06-2006 08:18:48




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need to know the tolerence for piston to sleeve when boreing for ap 143 pistons.




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Earl-IL

06-06-2006 19:32:02




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 Re: looking for man that bore out 70 lp. for ap143 in reply to shotgun, 06-06-2006 08:18:48  
Shotgun,Where do you live? The clearance is built into the piston. Every .001 you increase your bore over the Std hole size you will pick up extra .003 ring end gap. You said in your post SLEEVE . Has the block been sleeved? Increasing comp & timing advanced, lean on fuel will cause more heat. You have to take all of that into consideration. Earl



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