My trailblazer had 115 psi. I rebuilt it and took .035 off the head and now it has 140 PSI. I was just wondering on how much compression could the air-cooled trailblazer have before it creates too much heat to be reliable
Thanks
Terry

 

That should be fine. Stock is 120-125. Just make plug checks and make sure it does not run lean. As long as it dont run lean you will be good. I hope with that compression yuo put in a weisco piston?

 

Yes it is a weisco piston That is lighter and stronger then stock.

 

I did basically the same thing to my trailblazer never had a problem with it just run 89 or 93 octane seems to run better on one of those rather then the cheap crap.