340 crank in 318?

95dakotadude said
800hp is very doable. I'm guessing you haven't seen the 1000hp+ 4 cylinders.

I have, but they're not building those motors on a budget. I'm sure there's a market for 850hp, 2+ liter 4-holers to drop into your Mitsubishi Evo, because they're selling them...at around 20k a pop.

As the old saw goes, speed costs money.

95dakotadude said
I'm kind of following a build from hot rod magazine, with some twists. They did an NA 318 and got it to 425hp. I figure I could get at least that with NA. Then through equations online I found with 11lbs of boost I'd have about 750-800hp. It would be able to handle it no doubt with water/meth injection, etc.

Not to pour warm beer in your cornflakes, but I'd be very interested to see these "equations". My own experience with supercharged engines runs counter to the suggestion that 11 lbs of boost is going to give you a 90-100% increase in HP.

Again, not trying to be discouraging...just realistic.