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Tractor Pulling Discussion Forum

806 LP pistons

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Dan Dargeloh

02-26-2007 20:05:32




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I have a 806 gas burner that some moron put together. I'll go no further on it. I have aquired a C301 LP engine. The block is in almost mint condition. With a new set of rings and bearings (it sat for awhile) and a valve job I will have a perfect replacement engine. It has the 8.7 to 1 pistons (LP or high altitude pistons) in it. Will this thing run ok on this slop gas we have today, or do I need to replace them with the lower cp pistons like the gas engines originally had in them? This is a farm tractor, and will be used as such. There is a noticeable difference between the LP pistons and the gas pistons. HELP! I only want to do this once!

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Dan Dargeloh

02-27-2007 08:50:30




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 Re: 806 LP pistons in reply to Dan Dargeloh, 02-26-2007 20:05:32  
It is going into a 63 806 that will be used as a loader tractor. The original engine was cobbled together by a previous owner and will need one cyl. sleeved and some pistons replaced at the very least. The engine I bought was a UC301 LP engine that had been used on an irrigation well. The block is standard bore with almost no wear. I suppose I"d better by buy a set of stock gas pistons for it, as it needs to be able to run on what the local CO-OP calls gas. I"d thought about double head gaskets, but with only 4 bolts per cyl. that would probably not work out so good.

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High Octane

02-27-2007 07:43:32




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 Re: 806 LP pistons in reply to Dan Dargeloh, 02-26-2007 20:05:32  
It will have to run on 93 atleast! Run a compression test,, if the cyl pressure is over 200 psi, better start at 105. Look for E85, and mix it with pump gas and it will be a cheaper high octane fuel resort as to race fuel at over 6 dollars a gallon. 50/50 E85-93 octane pump gas can fire pretty high cyl pressured engines. Will be a stout engine. What are you putting it in?



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