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Discussion Starter · #1 ·
Here's the specs on the cam.

IN: .672 lift, 306°, [email protected]"
Ex: .673 lift, 312°, [email protected]

112° lobe centers


Is this cam worth a shit in a jet boat in a 10.5:1 496 w/ dual 660s on a tunnel ram?...or should I shop for a different cam? I'm gonna guess this thing will make its power at 6200-6500 rpms...(engine was originally built for a V-drive, but then I ended up scooping in a jet with a SS A impeller.

Should I cut the imp. down to a B?....or should I just grow a pair and squeeze the shit out of it?
 

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Here's the specs on the cam.

IN: .672 lift, 306°, [email protected]"
Ex: .673 lift, 312°, [email protected]

112° lobe centers


Is this cam worth a shit in a jet boat in a 10.5:1 496 w/ dual 660s on a tunnel ram?...or should I shop for a different cam? I'm gonna guess this thing will make its power at 6200-6500 rpms...(engine was originally built for a V-drive, but then I ended up scooping in a jet with a SS A impeller.

Should I cut the imp. down to a B?....or should I just grow a pair and squeeze the shit out of it?
i say, run the cam & see if the boat likes it...if not, u can always chng it...get ahold of Chris (cstraub) on the boards...he can help u out :)...just my .02 cents

FastRat
 

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AKA Blownjet 468
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1,193 Posts
that cam is almost the same thing I ran in my jet with a 12-71 blower.
it would turn an agressor A 6400rpm. don't think the lobe seperation quite
fits your application, but you allready have it, so what the heck! to bad
when regrinding, thats the only spec they can't really change much.
 

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mo balls than $cents$
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11,635 Posts
that cam is almost the same thing I ran in my jet with a 12-71 blower.
it would turn an agressor A 6400rpm. don't think the lobe seperation quite
fits your application, but you allready have it, so what the heck! to bad
when regrinding, thats the only spec they can't really change much.
x2, run it:)devil that 112 is keeping the overlap to a minimum and therefore comrpession will go up slighty with it over a 108 centered cam:)bulb otta cackle pretty good

that cam would like nitrous as well, squeeze 200hp on it!
 

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E-7 Sheepdog (ret)
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6,625 Posts
Might as well be a dissenting viewpoint.

I don't like nearly that much duration.

A blower is one thing, NA is something far different.

Save this thread and let us know how well it works.


Much harder to add size to an impeller, so leave it big and cut it later if it needs to be.
 

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Years ago I ran a 312*/322* sig erson cam in a 396 powered 1/2 ton truck. It was a gutless pig below 2500. Once you hit 3k it was one hell of a ride out to 6500 where my ignition system started to crap out.

If you already have it, run it and see if the pump likes it. If it doesn't you can cam up, put a shot of giggle gas to it or cut the impellor.
 

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steelcomp was here
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11,830 Posts
Here's the specs on the cam.

IN: .672 lift, 306°, [email protected]"
Ex: .673 lift, 312°, [email protected]

112° lobe centers


Is this cam worth a shit in a jet boat in a 10.5:1 496 w/ dual 660s on a tunnel ram?...or should I shop for a different cam? I'm gonna guess this thing will make its power at 6200-6500 rpms...(engine was originally built for a V-drive, but then I ended up scooping in a jet with a SS A impeller.

Should I cut the imp. down to a B?....or should I just grow a pair and squeeze the shit out of it?
Roller or flat tappet? Pretty impossiblbe to judge a cam without knowing anything about the heads or exhaust...The 266/272 is probably going to put your peak power up in the 6500+ range. On a 496 at that rpm, you're going to need a min. of 310-315cfm with a 270* lobe. I think 112 is as much as I'd go with 10.5:1.
 
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