BIGONTS Posted May 21, 2009 Report Share Posted May 21, 2009 I Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted May 21, 2009 Report Share Posted May 21, 2009 Whats your elevation? That will make a big difference in jetting and what size domes. You can go up to 150psi with +4 timing before you need to go to racing fuel. Quote Link to comment Share on other sites More sharing options...
BIGONTS Posted May 23, 2009 Author Report Share Posted May 23, 2009 Whats your elevation? That will make a big difference in jetting and what size domes. You can go up to 150psi with +4 timing before you need to go to racing fuel. I near Chicago and ride around there. It's like 500 feet. Thanks Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted May 23, 2009 Report Share Posted May 23, 2009 Good starting point would be 25 pilot, middle clip postion, 280 main, 1.5 turns out on the air screw. I would say get 21cc domes just to play it safe. I had 20cc at about the same elevation and was cranking 160 psi. Do you have a timing plate? If not spend the 30-40 bucks for one and set it at +4 and you'll be pretty happy Quote Link to comment Share on other sites More sharing options...
BIGONTS Posted May 24, 2009 Author Report Share Posted May 24, 2009 Good starting point would be 25 pilot, middle clip postion, 280 main, 1.5 turns out on the air screw. I would say get 21cc domes just to play it safe. I had 20cc at about the same elevation and was cranking 160 psi. Do you have a timing plate? If not spend the 30-40 bucks for one and set it at +4 and you'll be pretty happy No, no timing plate. I was also thinking about going with 21cc just to play it safe. Can't I mod my timing plate for 4+? Quote Link to comment Share on other sites More sharing options...
black sunshine Posted May 24, 2009 Report Share Posted May 24, 2009 [quote Do you have a timing plate? If not spend the 30-40 bucks for one and set it at +4 and you'll be pretty happy It is well worth the money. I'm at +4 timing and 20cc domes@850ft, 160psi. Runs great on pump gas! You would probably be better off with the 21cc's with your elevation Quote Link to comment Share on other sites More sharing options...
hercalmighty Posted May 24, 2009 Report Share Posted May 24, 2009 Honestly, just spend the $30-$40 for the adjustable plate. Then you can go -10 to +10 with ease. Quote Link to comment Share on other sites More sharing options...
AustinTX Posted May 25, 2009 Report Share Posted May 25, 2009 Sent you a PM Quote Link to comment Share on other sites More sharing options...
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