New engine in car, runs like a champ below 10 psi! Anything above that it seems to busting out. If we spray alky at lower boost (11psi) and max out the pump speed, it will compensate for the problem and run great up to 19-20psi boost. The only changes were LS1 MAF and translator, roller cam and rockers, and 70mm TB and upper plenum. It has the same injectors(009's), turbo(te 60), heads(Champion irons), chip(Red's 93), everything as before. I have tried draining gas and filled up 93 octane Chevron, added a bottle of "Heet" to remove any water. I have also rechecked the cam sensor setting. The fuel pressure has been raised to as much as 43 psi with vac ON, and I am still not seeing more that about 58psi at wot. Could the fuel pump be weak? Any help would be greatly appreciated.