cool head Q?

[fastass]

whats the highest compression cool head u can get without running race gas?

[Wallynut]

Depends on your elevation, most can use 20-21cc on premium gas

[dlnoss]

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.

[FASTOYS]

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.

[fastass]

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

[98bonerSTOCKshee]

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.