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jdhauler
02-19-2006 08:06:42
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Re: 620 power. in reply to jdjack, 02-19-2006 06:29:01
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I would not open up the carb, that might be a good experiment with 600cid, but not for stock, use an LP manifold set, get a good multi angle valve job, if you bore it, get LP pistons, you can shave the deck some, or the head, just dont get carried away, most only take up to .080 off the head, just my reccomendation, make sure the distributor isnt loose inside or worn out, install electronic ignition to get rid of the points, no power gain here, but reliability will be gained, and yes a good cam will help, but honestly if your stock cam is good, it should get the job done just fine and leave the money for entry fees and gas, I have never stalled out my 620 yet. use 89 octane or better, you dont need any race gas for that motor. also can set you rocker arms a few thousands tighter than .020. and try to dyno it, adjust the carb and timing slightly and get it dialed in, you might find a spot that makes the most HP, but you might not like the way it acts for farm use, trial and error on that, good luck, hope this might help.
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