Originally Posted by Thomas91169
the 4v's are good but i highly doubt with everything imagineable bolted on itll make close to 400. maybe if it was a high compression 5.4 4v stroker with a awesome set of cams, PnP heads/intake, the works. but then you just spend the equavilent of a supercharger and all its support it will ever need.
you can always do the above and add nitrous if its still not enough.
Listen to this man. Motor built for NA with nitrous = FAST!
But building up a 4V is going to BE DAM HIGH. You are looking at 1000 bucks just for cams(4 cams for 250 a piece through comp, you do the math), plus the heads are going to be more expensive than that.
The 4V head design(STOCK) flows enough air to maximize a 429 ci motor. Making it flow more won't help you that much for the amount of money you have to put into it. You really just need to focus on other ways of getting more air/fuel into the motor.