fastass Posted September 6, 2005 Report Share Posted September 6, 2005 whats the highest compression cool head u can get without running race gas? Quote Link to comment Share on other sites More sharing options...
Wallynut Posted September 6, 2005 Report Share Posted September 6, 2005 Depends on your elevation, most can use 20-21cc on premium gas Quote Link to comment Share on other sites More sharing options...
dlnoss Posted September 6, 2005 Report Share Posted September 6, 2005 It depends on your other mods. If your timing isn't advanced, you can probably get away with 160-165 psi with premium pump gas with stock porting and bore. A little less if the timing is advanced. Elevation will change the compression you get from a given size dome. Quote Link to comment Share on other sites More sharing options...
FASTOYS Posted September 6, 2005 Report Share Posted September 6, 2005 also depends on your bore size and if you have porting or not. The more you bore your bike out the higher the compression will be. Quote Link to comment Share on other sites More sharing options...
fastass Posted September 6, 2005 Author Report Share Posted September 6, 2005 Im at 3500 feet and bore size is stock, mods include fmf fatty with turbine core 2, K&n filters, boost bottle v-force reeds, and a pro design cool head, I just bought the bike and he forgot what the dome size was so now I trying to figure it out. thanks guys Quote Link to comment Share on other sites More sharing options...
98bonerSTOCKshee Posted September 6, 2005 Report Share Posted September 6, 2005 Im at 3500 feet and bore size is stock, mods include fmf fatty with turbine core 2, K&n filters, boost bottle v-force reeds, and a pro design cool head, I just bought the bike and he forgot what the dome size was so now I trying to figure it out. thanks guys 412105[/snapback] the domes are stamped, but you'll have to pull the head to see the marking. Quote Link to comment Share on other sites More sharing options...
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