Cam recommendations 572 blower
 

Looking to cam up a 572 dart, hyd. roller, 345 heads Merlin, valves 2.3 I / 1.88 E, procharged 6-12psi, 1400 Dominator, 6500 redlined, 26' 4000 lb. American Offshore catamaran. Guessing around 112, 264 dur, 680-720 lift. Those are just some random suggested specs. IDK. TIA Anyone got a similar setup and love how your cam rolls, let me know what you love and why.

Are the 345’s cnc’d or ported? I wouldn’t go to crazy on lift. Duration seems in the ball park. Ck out the comp lobes icdedpple had or has in his 548 builds if you get a chance. If you can’t find the thread via search let me know or he’ll likely chime in.

If you’re heads are stock I think their gonna be a choking point. JMO


Just for comparison only but still a good read!! Try and copy and paste. Cam below was one Dan jones spec’d however I don’t believe he went that route… can’t keep up with him! lol. I will say the cams he spec’d and ground for my na 565’s are spot on and very easy on the valvetrain and make awesome power all the way through!!!!

https://www.offshoreonly.com/forums/general-q/374052-tunell-raaammm.html


https://cimg0.ibsrv.net/gimg/www.off...92d1c86ce3.png

Mild porting done on heads. Plus exhaust raised .0600

This is what I ended up with .
Comp cams marine grind. Easy on the valve train.

It pushed a mid 80s tank to triple digits.
8# of boost
Dart CNC pro 1 heads

https://cimg0.ibsrv.net/gimg/www.off...1cd6d56053.jpg


26' and 4000lbs , thats is going to scream.!

Nice name btw,
My baja long ago ...:D


https://cimg5.ibsrv.net/gimg/www.off...5846c40523.jpg

Came so close to buying one of those 26 AO’s for that same reason. Sucken gas and haulin azz! 😳

Did you use a 4.5 or 4.375 crank ?

572 ci has 4.5/B x 4.5/S. Hope this helps. If I had 4.375/S, I wouldnt have a 572. Thanks

I believe the Chevrolet crate 572 is 4.560 x 4.375, that's why I asked. I think the 4.5 crank is better for a boat and I think it would like a little more cam than a shorter stroke, but it's only my opinion.

GPM,

Though my readings here on OSO, I think the consensus is that a 4.375" stroke is better for a marine application due to rod angle and prolonged high RPM running. Many here advocate for nothing above a 565 for this very reason.

Thanks. Brad.