compression?

[rkymtnrider]

the compression on my 99 superjet at around 8000ft above sealevel is 130 and 135.anyone know what the compression would be at sealevel? ive got any R&D head (no clue what dome size). ive been running 91 oct. (highest you can get up here.

 

[Idok]

pm glory freestyle or rmbc freeride.....both of them ride the mountain air as well....

 

[RMBC Freeride]

I'm chasing him around the boards... LOL

Sounds like thats a R&D Rec. head which probably yields about 170~175 psi at sea-level. That is of course if you measured it with a good compression gauge such as snap-on. (Cheap gauges from the autoparts store will yield lower numbers)