I have a cam out of my Shafiroff 540 sitting here and I'm getting ready to build a gen V 502 for my Velocity. I just want to get some opinions on the cam. Here are the specs. It's a Comp "HER" dual pattern grind 255/262 651/651 on 114 lsa.

Would it be better suited for a 540, or will it work in my 502? The motor will be stock bottom end and AFR 315 heads. I'm leaning toward the Crane 168741 grind, but if this one will work, why not use it.

Thanks,
Frank

I don't think you could spin the 502 fast enough for that one.

651 Is Big . Thats Very Close To What I Run And Made For Higher Rpm Range, I Was Told Its Too Big For The Boating I Do But Thats What Came In The Motor. The 741 Would Be Much Better For Running 5 - 6000 Rpm. Excellent Head Choice . Buy A Marine Cam, You Will Not Regret It. The Engine Builders I Know All Use Crower Cams And Lifters.

Not a good match but I applaude your desire for excess..

Does that thing come with a shovel to get the snow off the lobes. 230@50 if the exausts are wet, 235 is pushing it.

MINES A ISKY 617 245 INT EX IS 622 254 114 RUN DRY EXH On the dyno it dropped off at 6100 but makes 670hp I SPIN IT TO 5800 MIGHT REPROP AND RUN 5600, MAKES OVER 600 AT 5050RPM ITS A 510 TQ IS 637 4800

Frank, I have a pair of 565cid naturally aspirated engines with the 315cc AFR CNC ported heads and even I don't use a cam anything even close to that much duration----and so far I have had my 32' A/T running at 93.6mph on the GPS, full of fuel, calm water, and going against the river current!

You might want to try contacting "RMbuilder"/Bob Madara of Marine Kinetics. He has helped many guys get dialed in here on OSO with proper cam selections.

Hope all goes well with your mods.

Mark