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Re: WD 45 with high pmpression pistons
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Posted by Texas Denny on January 30, 2006 at 11:11:10 from (66.68.15.150):
In Reply to: WD 45 with high pmpression pistons posted by Play farmer on January 30, 2006 at 10:02:03:
The WD-45 also came as an LP version. Gasoline had a 6.45:1. LP had 7.2:1. The distillate version was 4.75:1. My guess is that your high compression pistons were LP pistons. Even aftermarket high compression probably were 8.0:1. Regular gas should work fine to 8.5:1. When you approach 9.0:1, the combustion chamber will need a better design than Allis has. A lot of cars are running today at 9.5:1 on regular but with a well designed combustion chamber. If you are trying to start it with 6 volts, you'll need really good cables - I'd say 0 gauge or 00 gauge. If you switch to 12 volt, use good cables of about 2 guage. The original starter should crank it fine if all the cables are real good and all the connections are very clean. Don't forget the nose of the starter where it goes into the bell housing. Clean is good. Make sure the stud that holds the starter in is clean - no grease. And that this stud turns in freely and seats solidly into the starter. Back off the locking nut until it is in and tight. Then tighten the locking nut. You shouldn't need anything special with good cables and clean connections. My guess is your pistons should be fine with regular gas. Might worry about the life of the valves if you are close to 8.0:1 and using it hard.
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