Is a 604 ci at 5300 rpm better than a 572 ci at 6000 rpm?

tourqe is what turns the prop go with the 604 no substitute for cubic inches

The only substitute for cu ins is MORE CU INS!!!
604 at 6500 now you talking

653 Supper Tall Decks are better yet, ZUL.

Depends on how you make the cubes...
I would go with the 572ci at 4.5/4.5 more rpm, less load on the drivetrain.

I agree, why not 598 at a conservative 56-5800rpms.

Joey Griffin want's to go 572 ci at 6000 rpm for 750 hp. I already have 604 at 5300 for 725 hp, but we blew a rod and now I'm afraid for the other engine. I talked to Joey and he does'nt like big ci cause of the long stroke. To hard on the rods.

I ran Oliver 6.7" rods in 632" with no problems, proped to turn 6200 NA and 6700 on the juice. Bottom end was good for 8200 according to the builder.

Whats the ratinal in going 604, why not go 598CI set up at 5400 very conservative rpms. I have had 4 of these, 2 on a 2000 Sonic with over 400 hours now, and the last 2 on my 4300 Nortech which has 140 trouble free hours. To many rpms for me, but I am somewhat conservative. 745 hp/763tq

http://www.offshoreonly.com/forums/s...hlight=TMP+750
Hopefully this will help. Its one combination that has worked great for me.