Getting another 100 hp from my 415 hp 502?
#1
Getting another 100 hp from my 415 hp 502?
I have a 415 horsepower 502 and would like to get another 100 hp out of it. Any suggestions on what I should do? Head work, cam, exhaust? Is the merc exhaust ok with another 100 hp. Will I have reversion problems with the cam I will need? Thanks for any input.
#2
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I built a stock 509ci engine using all stock parts except the valve train. I went to Bob Madera @ Marine kinetics who set me up with an entire valve train setup but pushrods. Springs, retainers, locks, roller rocker arms, hydraulic roller lifters, cam and he recommended an air gap manifold & 850 quick fuel carb. With a DUI distributor this engine made over 500 lbft of torque from 2800-5300rpm & with a 1" spacer under the carb it made 512hp@5300 but would wind to5600 using dynoroom headers. I am pretty impressed for having to buy new stuff I spentjust under 3G for a turn key stump puller that will live for many hrs. Randy
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#8
I’m also in the same boat as you with my 509, 088 heads, airgap & 496 manifolds. I was surprised to read here on the forums a guy running the 502ZZ cam & stock exhaust without reversion. Also read the original HP 500's (731 cams) had Gils and silent choice? I haven’t decided witch cam to use ( may just re use my 502 HO cam) but thought my 496 manifolds would be an improvement over the above exhausts with either cam.