Tweeked.....you may never see 9psi with the KB specified 9spi pulley with your set up. Remember, you've opened things up on both ends making it more efficient and have also increased the engine displacement. The larger displacement means a larger volume of air is being utilized and as a result, isn't stacking up within the manifold.TweekedGT said:The horsepower pissing contest still kills me. Right now my car has an intake manifold gasket leak (i'm sure that's my problem now) and I'm only seeing 6#'s of boost due to the leak down and 370rwhp and 373rwtq on a Mustang dyno after we detuned it due to scary amounts of timing and it still hauls ass. If i were you i would stick with one of the entry level blowers, KB 1.7, or Vortech V2. 400HP is a lot for a street car. The limits of these blowers at around 500rwhp is stupid amounts of power for a street car. I've been babying my car until I can get it fixed and it still breaks the tires loose in 3rd with 315's. Any 400HP car is no joke. Go with what makes you happy, save some cash and go for a Centri blower or go for major low end torque and get a KB. Either one you should be happy with. I can't imagine what 500rwhp is going to feel like when I get mine working right. That is a helluva lot of power! Don't really need it but will be fun to have.
It’s by no means a bad thing….you’re actually going to make more power, while seeing less boost on the gauge. Lower boost numbers also means less heat…which is another good thing. I don’t see your car having much trouble seeing 500rwhp….but I still think you’re going to need to mix a little race gas in to do it.



. Problem is that most people cant drive, so with most people, M5 + turbo = not too hot lol. And BIG single turbos with manuals suck especially...I have a twin setup that should spool VERY fast.

. I guess it doesn't matter since i probably shouldn't use it till I get the manifold gasket leak fixed.