pro design cool head??

[j450rking]

i see the pro design cool heads on rockymountain but i don't know much about them. what do they help exactly?

[pimpt250r]

they say improved cooling and you can adjust your compression

[j450rking]

i wounder how you adjust the comp?

[CorvetteZ06]

they have increased cooling, and you can change different size domes inside the head to adjust your compression.

[peeping TOM]

you know your in the 250r forum? right ..

[j450rking]

oh ok i get it. so were it says 18cc thats to do with comp. so how can you tell what your comp is going to be when they tell you 18cc

[j450rking]

Originally posted by peeping TOM
you know your in the 250r forum? right ..


yeah i'm asking about a head that go's on a 250r..

[j450rking]

so can i use pump gas with the 18cc dome? i going to get a cometic full engine gasket kit. do they come with a thicker head gasket?

[BKex]

usually with a 18 you would run race gas...you would want more like a 21 for pump

[j450rking]

oh ok so the larger the cc's the lower the comp for the dome?

[EXtreme-]

Originally posted by j450rking
oh ok so the larger the cc's the lower the comp for the dome? yes. 21cc/93 octane

[j450rking]

ok thanks alot guys!! i think thats all i will have to know