502/509 cam & valve train selection
 

1993 32' fountain

I blew a head gasket last fall, pulled both my 502s out, had them redone to 509 used all the stock components except the new Pistons (everything reconditioned, melling high volume oil pump, etc) but basically stock, 9.5 to 1

Aluminum heads, rectangle port
119 cc
320 intake runner
2.25 intake
1.88 exhaust

Intake manifold
World products Marine, single plane, with 850 Holley

STOCK IGNITION

Full wet exhaust (headers) 8" rise

I think I have all the pertinent info here, I am hoping to get 600hp with proper cam and valve train combo

I want to reiterate boxed items only, I have a reason for this

I am looking for cam, roller hydraulic lifters, roller rockers what ratio 1.7?


Looking for input from EVERYBODY, let's not turn this into a only one guys know everything column, I want all opinions

Crane 741 cam
Teague has great price on the 1.7 crane Gold Rockers.
.120 or .135 pushrods from trend, manton, smith bros, etc (proper length of course)
Morel lifters

:popcorn:

Call Marine Kinetics...... Enuff Said!

Or: Jones Cam Designs / JRC Technologies Group / Address: 7859 Commerce Drive Denver, NC 28037 / Phone: (704) 489-2449

Obviously not everyone read completely, I already know what to get from Bob M. I am looking for real input on boxed items. Readily available to all.

Was just checking out their website. Looks like Mike Jones has an extensive background, and grinds his cams in house.

http://jonescams.com/

are these orig heads? or new ones? comb chamber size? how much dry length in these exhausts?

Understood, go with Mild's suggestion about as good as you can do "box wise" for your application.
Also good info to know, "are these orig heads? or new ones? comb chamber size? how much dry length in these exhausts?" Flow is the the money maker...

Did a pair of 515's for a friend a couple years ago. Went with 741 cams and crane gold rockers, trend pushrods. Engines were approx. 10 to 1 and everybody was more than happy with the results from that cam. It's still a great cam!

For an off the shelf cam I've always wanted to try the Crane 139681. The 741 is proven over and over again with great results going back to the late 80's. Just curious what your trying to achieve for numbers.