Camshaft Specs

[AZKC]

I picked this cam after talking to Comp Cams anybody using one. Curious on idle rpm and power band.
http://free.***boat.net/ubb/Avatars/Gearhead_Garage/Motors_and_Drives/454.rx70007.JPG
454 20ft jet boat, 750cfm carb, HEI, with logs
KC

[kc0000]

They sold me the same cam, according to the Dyno2000 software you should see 450hp/516ft

[DUCKY]

In my book, too much cam for a larger jetboat. Lobe center is good, lift is good, but too much duration. That cam is probably rated for 2500rpm to 6500 or higher. It will work, but I think there are better choices available. That's a little more cam than I have in my v-drive. Mine is 3000-6000 rpm, 228dur. @.050" and .544 lift. It has a nice lope at 800rpm in gear idle. Clears out about 2500, and pulls hard all the way up through. Mine is a Crane Powermax H302

[wsm9808]

I had the Lunati with .230/.230 dur @ .050 and .544/.544 lift. Engine is 468bbc, 9.6 compression, ported oval port heads with 2.19/1.88 valves, logs. tall single plane and 780 and stock HEI.
It turned a tight A impeller 5200rpm, which according to the pump charts is 435 HP.
It looped just a little dry, but when the water hit the exhaust you couldnt hear the lope at all.
If I did it again I would go with a bigger cam, much like the one you picked. It always felt like it wanted more cam and carburation, but with out headers I didnt feel I would get the full effect of going bigger, so I didnt see much point in changing anything.

[AZKC]

Thanks guys, I went a little bigger cause I usually under cam to be conservetive and keep some drive ability. Not skiing as much so wanted to kick it up, we'll see how it goes :rolleyes:
KC

[396_WAYS_TO_SPIT]

I agree with ducky about keeping it at 230@.50
I would like to hear your results with the cam you chose. I havent picked my cam yet so I would like to compare results with my buddies boat.
396

[Licketty Split]

The way I got it was that if you go extream keep your lob seperation wide so you dont injest water at part throtal. I'm running 112 I will let you know how it runs when its done

[AZKC]

Licketty Split:
The way I got it was that if you go extream keep your lob seperation wide so you dont injest water at part throtal. I'm running 112 I will let you know how it runs when its done Thats what I heard too, The guy at Comp Cams also said it had 4* advance built in. Should be firing it up in a couple a weeks, should be interesting. Biggest cam I've ever run :D
KC

[1tricky1]

Hey KC, I've got a pretty similiar Clay Smith Cam. It's a 570 lift, 240@ .050, 108 lobe separation. Although I have OT headres, I love the way sounds. Kinda ratta-tat-tat @ 900-1000rpm. I don't do a lot of skiing with it but don't see why I couldn't. It cruises nice @ 3,000 rpm which equals 30mph for me. I max out at about 5400. (I think a nice sweet spot in the cam).
What else you got in that 454? I still think I'm fairly mild with 9.5 to 1 comp. Although I do have some nice heads, the 049 oval' w/ some nice porting work and the bigger valves. I think as long as you have 9.0 to 1+, that should be a nice cam for you. :D