Offshoreonly.com - Off the shelf cam options for marine engines

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I don't own the boat any more, it was all stock including exhaust, never had a reversion issue. It was in a 22 Donzi classic, not fast 68 gps, just a fun little ride.

Quote:

Originally Posted by GPM (Post 4405744)

Has anyone else run one of these in a stock 454 mag,

Voodoo Hydraulic Flat Tappet Cam - Chevrolet Big Block 276/284

Product Description

Lunati's Voodoo series of Hydraulic camshafts deliver more area under the curve than any other series of Hydraulic camshafts. This means more throttle response, quicker acceleration, more vacuum, better efficiency, combined with maximum horsepower and torque!Hydraulic Flat Tappet. Hot street cam, likes 2800 converter, high-rise type dual plane intake with 850 CFM carb, headers, 10:1 compression and 3.73 gears. Likes up to 200HP nitrous.
•Advertised Duration (Int/Exh): 276/284
•Duration @ .050 (Int/Exh): 233/241
•Gross Valve Lift (Int/Exh): .554/.572
•LSA/ICL: 110/106
•Valve Lash (Int/Exh): Hyd/Hyd
•RPM Range: 2200-6400

Stock Mercury 440HP 454ci cyclone camshaft
293/310
232/239
.549/.558
110 LSA

That lunati you listed, appears to be more agressive by comparing duration numbers, esp by flat tappet standards. I think it be a pretty hot cam for a 454 budget build up.

I liked it, it had a nasty sounding idle, but was easy in and out of gear. Pulled real strong to 5400, worked with the captains choice, nice all around cam. Back when I bought it, Ultradyne
was actually the one selling them.

Quote:

Originally Posted by SB (Post 4405438)

Sometimes it's not about how peanut butter is made, but who's spreading it

http://www.rightthisminute.com/sites...rial-video.jpg

She is a developer of really big cam shafts

kris,was their any change in the compression ratio?loosing that much speed equates to at least a 100 hp loss i would guess.i just can,t imagine that cam causing that by itself.

Quote:

Originally Posted by MILD THUNDER (Post 4405666)

We have seen that 651 cam make peak power in a 540 at 6400rpm with a roots blower. My gut tells me it was prob making its best power in ricks 598 around 5500ish. Prob why he was where he was. My guess is rick wanted to spin the engines faster, and make more power, hence a bigger cam. Just my guess though.

i had 651 cams in my cat,if i remember correctly they peaked at 6500.mine made 950 with 8 lbs boost.i would have never sold it if it had ssm drives.

Quote:

Originally Posted by Full Force (Post 4405451)

yes and that's about 30 HP I am told, so 660 is record breaking??? for a 540??

My NA 509 made 684 at 6200 if I remember correctly.

Quote:

Originally Posted by 12meter joe (Post 4405461)

Makes sense. Like a jiffy lube.

Correction...Jiffy Lobe

Build specs? that's a huge number for that CI...? curious to see what it was..

Quote:

Originally Posted by JRider (Post 4405889)

My NA 509 made 684 at 6200 if I remember correctly.