604ci or 572 ci
 

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

Re: 604ci or 572 ci
 

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

Re: 604ci or 572 ci
 

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

Re: 604ci or 572 ci
 

653 Supper Tall Decks are better yet, ZUL.

Re: 604ci or 572 ci
 

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.

Re: 604ci or 572 ci
 

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

Re: 604ci or 572 ci
 

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.

Re: 604ci or 572 ci
 

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.

Re: 604ci or 572 ci
 

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

Re: 604ci or 572 ci
 

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