How much boost can a 4d55 handle? The turbos are all finished and it runs great. I can't drive it yet because Im putting different axels under it right now. No steering or breaks. All I can do is rev it up on the jackstands, without any load on the engine. It's hitting 11-12 pounds of boost at 3500 rpm, no load.

Last edited by rockrenegade; 11/01/07 11:28 AM.