Well, I finally got the boost gauge installed in my truck. For you that don't know, it's a '95 Cummins powered Ram. The engine was turned up by a prior owner to an unknown level. I bought a 35psi boost only gauge figuring I'd see around 22psi. My eyes absolutly bugged out when on my first WFO blast I promtly pegged it! Holy cow!

Sorry, just had to relay my experience...

Damn that's alot of boost what do they make stock ?

My buddy's hopped up Cummins is over 40!

And I thought 15 was good on mine.

I'm guessing that 15psi is stock. I've heard of people running over 40psi, but I always figured that they were custom built engines. Crusing down the highway I'm making 9psi. Get into the throttle to pass a car and it'll quickly go up to 25psi. That's just incredible.

I don't know what "normal" is for that Cummins.
A Duramax we had on the lot ran 26psi with some mods.

My Caterpillars in my Sea Ray make 36psi, stock.