Originally Posted by MILD THUNDER (Post 4404658)

Quite possible. I dont think the duration change was more than a couple degrees. This was also a 522 inch engine. That cam was from terry at custom cams i wanna say.

Marine kinetics did a cam for this engine when converted to roots and afr heads. It made 1020hp at 6700rpm with 10lbs of boost. Cam was a standard cam core .842 hyd lifter. Duration was 245/253 113LSA, with lift something like .697/681 or somethint like that. Ill have to dig up the cam card . Engines have dyno time only, so it will be intersting how they hold up in the boat. Kind of scary hearing and seeing some of the carnage with similar setups now.

Originally Posted by Black Baja (Post 4404682)

The guy down at the marina has a 540 n/a 24x 25x .780 .7xx standard core standard lifter. 5 years same lifters 3 world championships. Only thing that has failed in the motor was the Rolon timing chain. Which in the last 2 years have been known to fail. That motor spins 6700 rpm and is a touch over 800hp...

Originally Posted by mike tkach (Post 4404687)

do you know the brand of the cam,lifters&valve springs in that engine?edit in.after rereading your post .780 lift i am pretty sure this is a solid roller setup,not hyd roller.

Originally Posted by Black Baja (Post 4404701)

Yes it's solid. Comp cams is what he uses for cams. The lifters are Jesel. He also does a 540 hydraulic setup .680 lift 250 seat pressure morel lifter. I forget the open and duration numbers. They spin 6300 and after 100hr tear down they show no signs of tear up. I'll find out the other numbers on the cam and spring pressure. He does however use the limited travel lifter on solid lobes...

Originally Posted by Black Baja (Post 4404701)

Yes it's solid. Comp cams is what he uses for cams. The lifters are Jesel. He also does a 540 hydraulic setup .680 lift 250 seat pressure morel lifter. I forget the open and duration numbers. They spin 6300 and after 100hr tear down they show no signs of tear up. I'll find out the other numbers on the cam and spring pressure. He does however use the limited travel lifter on solid lobes...

Originally Posted by StraubTech (Post 4404704)

Is Steve Conniff the engine builder?

Originally Posted by MILD THUNDER (Post 4404705)

I was looking thru comps master lobe catalog yesterday for myself. They have alot to pick from. Pretty easy to spec your own cam with the lobes they have avail. For myself, i would prob stick with their marine hi lift series. For a lobe in the duration id be needing, id be in the .620-646 range lift wise. But im not racing the boat in a restricted class, i just like running hard once a while, and hitting the beach...

Originally Posted by MILD THUNDER (Post 4404705)

I was looking thru comps master lobe catalog yesterday for myself. They have alot to pick from. Pretty easy to spec your own cam with the lobes they have avail. For myself, i would prob stick with their marine hi lift series. For a lobe in the duration id be needing, id be in the .620-646 range lift wise. But im not racing the boat in a restricted class, i just like running hard once a while, and hitting the beach...

Originally Posted by Black Baja (Post 4404709)

Steve does the machine work. Tony at CMS does the final assembly. The two of them are very tight.

Originally Posted by StraubTech (Post 4404714)

Steve has been a customer for a few years now.