2003LimitedBanshee Posted January 29, 2006 Report Share Posted January 29, 2006 i run 20cc domes on pump gas with a stock bore and i was running 140psi and that worked super good so if i was you i would go with 20s. if you bore you cylinders out you dont have to do anyhting to the head all the domes will fit unless you have a big bore kit or something like that. 465974[/snapback] 20cc domes will not produce that much compression a 8000' ft elevation, but may produce more at sea level. Again, blanket responses don't work. According to the compression estimates from nossmachine.com, if you were running 20cc domes at sea level you'd be at 169psi on a fresh stock bore. Most people will tell you that this is above the rating for 91 octane premium and you should mix some race gas, especially if you're running adv. timing. Quote Link to comment Share on other sites More sharing options...
FIRST BANSHEE Posted January 29, 2006 Report Share Posted January 29, 2006 One more quick question. Will the stock studs be long enough to mount the pro design unit or do I have to replace with longer ones? If so whats the best place to get them from. I haven't seen any on ebay or on any of the sites I've been searching. Thanks. 465491[/snapback] the noss head uses factory studs and comes with a nice set of nuts, personnaly i'd give him your bussiness. Quote Link to comment Share on other sites More sharing options...
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