Anyone Running Bigger Than Stock 500hp Cams With The Stock Gill Exhaust System. If So How Big And Any Reversion Problems.

Thanks

You have the taller, updated risers so I think you could go with something in the range of a Crane 741 without any issues.

Griff what is the specs on the 741 cam, and is it a proven hp upgrade.

Thanks again Rick

It was probably the one of the most widely used cams for upgrading the 500HP. 236/244, .610/.632, 112 lobe sep. If you want to reduce the reversion possibilities and get a smoother idle, have one ground a 114 lobe sep. That would be the same as the 525EFI cam
http://www.cranecams.com/index.php?s...41&lvl=2&prt=5

silent choice, 741 cam. Low risors, non problems

Ihade lots of problems with my gils stock 500 HP"s I let them idle too long in a no wake zone /got fuel /restarted let IDLE till i till got out/let the sticks fly at 3500 blue a pistion /now I am going with CMI"S There is a reason mercruser stoped useing GIL'S in 2000 ps I hade tall pipes

What cmi are you going with.

But which Gil risers did you have????? and are you sure this was a reversion issue????

Rick, If you are really concerned about reversion and the choice of cam you are putting in your engines, then contact RMBuilder/Bob Madara of Marine Kinetics in N.Y. (585) 654-8583. He will take all of your engine's components and match them to a custom cam profile designed specifically for YOUR engines and what you want to do with them. Bob is one of the country's BEST "go to" cam experts you will find...especially for marine offshore hi-perf applications.

I hade the long S type ( Iam going with E types