Newcs222 Posted May 3, 2014 Author Report Share Posted May 3, 2014 For sure you can. I think it's around 19cc where you can't run pump gas. 20cc should be fine. With 21 cc domes I'm getting around 145 psi each cylinder Sent from my HTC One using Tapatalk Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted May 3, 2014 Report Share Posted May 3, 2014 20cc's is pushing it on stock motors. Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted May 3, 2014 Report Share Posted May 3, 2014 20 cc domes will not give the same compresion readings on all engines. Elevation wear and porting can change the numbers from motot to motor. Check the compression when your done. You may need race gas. Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted May 3, 2014 Report Share Posted May 3, 2014 20 is pushing race gas on most stock motors. 10 psi for evervy cc. Roughly. Quote Link to comment Share on other sites More sharing options...
2004LEBanshee Posted May 3, 2014 Report Share Posted May 3, 2014 Also your going to want a stock crank welded with the timing and compression. Some will live some wollnt. Quote Link to comment Share on other sites More sharing options...
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