I know that there are alot of threads about this but I have not seen one to answer my question yet. How much pressure can you run without doing mods to your prom?? I am about to do a motor swap with some minor mods, cam,intake,exhaust and ultimate tbi. I have not got into chip burning or tuning yet! Still havent decided the best route to take Ebl,ostirch,Moates all in one etc?? I do have access to a scanner to read the computer while driving. I work at an Autoshop etc. Im just wondering if you can run 14 plus psi without doing Pw mods?? will this affect the idle quality etc??? I have upgraded the fuel pump to a TPI unit and that should be good for 35psi or so. Any suggestions would help greatly. The cam is a comp 260H 440lift 212duration on a 110Lsa. It should be right at about 275 to 280hp at the crank. Or at least this motor made 250Hp without the intake and carb mods with a 600cfm carb. Thanks once again for the great help