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Hyd. roller cam, roller rockers, better heads, upgrade exhaust. all can add power and 450hp is a really ez number to get to. got pics of the motor? what type of exhaust does it have now? every improvement you do to get more air/fuel in and exhaust out will make more power.
As above, not hard to do at all. You can do a bunch of research and order piece by piece, or the really easy option is to get a proven package. I like the process of researching and creating the combination, but if you just want the easy answer...
Edelbrock Performance Package
Easy. Cam,carb, intake and exhaust. Easy 100-150 there. Let us know what you do.
No Fool Like A Old Fool is there?
Here are the cam specs:
Cam Style Hydraulic flat tappet
Basic Operating RPM Range 1,500-6,500
Intake Duration at 050 inch Lift 240
Exhaust Duration at 050 inch Lift 246
Duration at 050 inch Lift 240 int./246 exh.
Advertised Intake Duration 300
Advertised Exhaust Duration 306
Advertised Duration 300 int./306 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.560 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.573 in.
Valve Lift with Factory Rocker Arm Ratio 0.560 int./0.573 exh.
Lobe Separation (degrees) 112
I'd step up the compression a wee bit, drop in a 1/4" stroker crank, and go up a step or two on the cam lift (mild increase). This won't kill the outdrive, but give you noticeable improvement in pulling power. It's amazing what a little more lift and a stroker crank can do to wake up a big block.
Essentially you go from a 454 t a 496 which is "smooth" power, not rpm crazy...
OK Bob, Steel, give him the part numbers!
Ps. I have used Edlebrock combo's on street cars and they were very effective. I used their cam, intake, carb combo and had my guy do the heads. If you are in the Bellflower area, I know someone who can help you with your project and keep it "under control".
Last edited by VDRIVERACING; 08-01-2011 at 06:01 PM.
Just put a ProCharger on it. 4-5psi should get you the 100hp your looking for. Bolt it on and take it off if you decide to sell the boat and put it on the next.
Keeping your target rpm in the 5000 to 5500 range will simply require more air in the engine. Without forced induction, your biggest restrictions are your heads (assuming they're peanut port heads) and the stock exhaust.
Options options options, which to choose?