Cam recommendations - 502 (former ZZmotor)
12-20-2007, 06:06 PM
#11
Masher touches my
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I've got a Crane 731 roller cam for sale.It is for a Gen VI block. It has less than 100 hrs on it. It made great power on my 502 motor. It will slide right in and you can re-use the stock lifters. I would like to get 275.00 for it. They sell new for 435.00 at Summit. The lift is 587 int and 610 ex and a 114 center. PM me if interested. I have 2 to sell.
Smitty
Smitty
12-20-2007, 08:03 PM
#13
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Lemme take a guess here. I ran the exact same boat with a zz502 short block, merlin rec port heads with some mild port and bowl work, a 741 crane cam, victor jr intake and a 1050 dominator with more hours work in it than I care to remember, SM Dominator exhaust, Bravo 1 with a Mirage plus 25" prop and hit 68mph light.
If your aiming for 70mph, you will need more HP than the basic combo I described.
Now, if you build a 540 with basically the smae setup, you can hit 72.
I gave up and bought a cat
If your aiming for 70mph, you will need more HP than the basic combo I described.
Now, if you build a 540 with basically the smae setup, you can hit 72.
I gave up and bought a cat
It's not a drag boat fellas....
12-21-2007, 06:32 AM
#15
Josh- Big lift on a big block is in the upper 6's to lower 7's. The cam I am selling still idles like a stock motor. Anybody that ever heard it idle never knew what was really under the hatch
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12-21-2007, 12:52 PM
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12-21-2007, 11:49 PM
#17
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Smitty, ya I know in the bbc world a 731 isn't a monster bump stick, escpecially with todays big cube 502/540/572 combinations. I just don't see the need in going with that much lift for my combo. I just have oval port heads, dual plane intake, and 850 carb. I only need to spin this thing 5300 rpm or so.....
I'm leaning toward that 01-451-8 comp xtreme marine grind. Duration 230 Int, 236 Ex; .547/.547"; valve timing at .006" ivo 32, ivc 72, evo 79, evc 31; 112 LSA. It makes good numbers on desk top dyno compared to my ZZ502 cam. Any opinions on reversion with this cam and my Revolution marine manifolds????
There is a few Lunati cams I'm looking at also, but I need to call the tech line to get timing specs for it, I didn't see them on Lunati's site. The 2 lunati numbers were 54867 and 54866.
I tell you what, my next boat is definately going to have dry tails, sure would make this cam selection thing easier
I'm leaning toward that 01-451-8 comp xtreme marine grind. Duration 230 Int, 236 Ex; .547/.547"; valve timing at .006" ivo 32, ivc 72, evo 79, evc 31; 112 LSA. It makes good numbers on desk top dyno compared to my ZZ502 cam. Any opinions on reversion with this cam and my Revolution marine manifolds????
There is a few Lunati cams I'm looking at also, but I need to call the tech line to get timing specs for it, I didn't see them on Lunati's site. The 2 lunati numbers were 54867 and 54866.
I tell you what, my next boat is definately going to have dry tails, sure would make this cam selection thing easier
12-22-2007, 11:02 AM
#18
Somebody correct me if I'm wrong, but the cams I am selling is the same cam used in the carbed HP500 merc motors.
Josh-- I think you are going too small and you will not be happy. I only ran my motors to 5500 with this cam.
Josh-- I think you are going too small and you will not be happy. I only ran my motors to 5500 with this cam.
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12-22-2007, 11:51 AM
#19
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Would you please explain your statement about keeping the lift under .570" What part number GM rollers are you referring to?
12-22-2007, 11:58 AM
#20
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Is this the roller set? Or are you planning to use the stock stamped rockers?
