SX/SXi/SXi Pro compression goo or bad

[fastcat777]

no luck with responses so il try here. did a compression check on my 2 skis just to see if there was a big difference. Im mainly looking into the 750sx but i did three attempts ski with a autozone gauge and my 750 stock is pushing 110. im wondering if 5500 ft elevation is that big of a factor. so for shiz and wigglez i pulled the 650 with high comp head not sure of internal work and it was 145. ive googled and found 650sx claims of 110-180 , but no one ever says anything about elevation changes. im just wondering if il be riding in az or if il be getting a top end then riding, im hoping elevation has a impact and il get it down there and find it has normal range but wondering if anyone has any input about elevation having such a drastic impact or hopefully a pos gauge ? Input plz. oh and just got this ski and water still icy so thats why i havnt been able to try anything other than this

 

[Mdavies_02]

Elevation does play a role on compression, however, I don't know to much more than that.

 

[fastcat777]

thats what sucks everyone is really sea level as i used to be in az so its hard to get a straight answer unless someone is a mechanic, in elevation or used to travel and race.

 

[_evan]

I just saw a thread on compression ratio change for elevation but i cant remember for the life of me what section/website it was on (I think it was pwc today). I believe its 6 psi per 1000 feet so 143 psi at sea level? sounds pretty decent.

EDIT. Did a google search and it is 6 psi per 1000 feet so your engine is fine.