Originally Posted by knightmare1015
The manufacturer. I still wouldn't take that chance though. Anything more than 4 psi can seriously damage the engine's internal components very badly. Now don't get me wrong now but there are some models out there that can handle alot more boost than that. Like the 3.7 and 3.5 ecoboost V6 engines found in the new F150 and Ford Taurus Sho models. It really depends on how well the engine has been maintained and how you really go about doing it. His engine can't handle that amount of boost because it's worn out. Now a newer engine might be able to but it's risky. It can and yet sometimes it can't.
do you have any clue on what you are talking about? The 'manufacturer' doesnt say anything about how much boost you can or cant run. Ford doesnt state that you can only run x about of boost on X motor. There are ALOT of things that will determine how much boost you can run, like what fuel you use, if you use an intercooler, your ignition system and what your fuel system consists of. Also, using the ecoboost motors in your argument isnt valid, as they come from the factory with lower compression ratio's since they are boosted.
btw, fwiw, one of my friends procharged his 350z and he can run upto 10psi, and my other buddy is putting on a supercharger on his 2011 3500hd and out of the box it runs 8psi.. on the stock fuel pump too.