pslonaker

iTrader: (1)

Does anyone have the specs for the HP500 "blue motor" for the carb version as well as the EFI/MPI version? Thanks in advance.

Rockfish71

I think this is it
http://www.cranecams.com/?show=brows...tType=camshaft

Griff

That is the older flat tappet cam for the 420/525SC



The hp500 carb is a Crane 169611
http://www.cranecams.com/index.php?s...11&lvl=2&prt=5

The 500EFI is a Crane 169621
http://www.cranecams.com/index.php?s...21&lvl=2&prt=5

pslonaker

iTrader: (1)

Thank you VERY much guys. I read somewhere...I think...possibly on Teague on Tech that the Crane 139731 cam was the same as the HP500. I am trying to get my marbles lined up...again...thank you.

ezstriper

there are companys re-grinding that cam as well..not sure who, but I ended up with one...

Griff

The 731 is very close to the 500EFI cam.

The 500HP carbed cam has a 110 lob sep and was a lot more prone to reversion.

pslonaker

iTrader: (1)

I assume that these cams are still available thru a Mercury/Mecruiser dealer. I havent checked, but I will tomorrow. Thanks all.

formula 382 sr-1

iTrader: (3)

They maybe but I don't think you will want to pay the price.

Rockfish71

Call Bullet Racing cams AKA"UltraDyne" and talk to Tim goolsby 662-893-8022 he will dial you in with the right grind your looking for they can grind the 731 if that's what you want or you can tell him what you have and want and he will come up with a custom grind that will run better than the ones your looking at.

formula 382 sr-1

iTrader: (3)

We went with bullet in the 383's and picked up 4 mph just with a cam change, I can't say that with other cams we had made.