ameristar1
The One Blue Thing
What are the structural weaknesses of the 6.9/7.3? I read the stickies about the block worm, but what breaks and why when turbocharging this engine beyond 15psi boost?
Running high compression with a lot of boost is not a good way to go. All we want is a lot of oxygen in there. If you can get it, without ungodly cylinder presure than that is the best. Unless you drop the compression in an IDI, you won't be able to get enough air volume in the cylinder to really make any HP. All you will get with high boost, is added strain during compression, and you'll probably squeeze a gasket out no matter how good the head studs hold. Piston wrist pins are the next problem area.