Originally Posted by cig1988

Get your mind outta the gutter.
At the crossroads here and need some input. I have a choice of just going with the blocks I have. Salt water exposed for apprx 8 years. Religiously flushed and appear in decent shape. Going with Dart 345 cc heads marinized and hardened exh seats. All and all for another $10K I can go with a new Dart block all new internals & pondering the thought of stroking it. Leaniing towards dependability cause I'm just getting too damn old to be doing this. Money is no object and I want naturally aspirated engines. Any thoughts on what stroke etc etc ?
Stan

Originally Posted by AIR TIME

I just was a 598 770tq at4800 750hp at 5600or5800 hpmight have been more I was looking at the tq ##. cam was same as in my 510 I make 627tq at 4800 and 650 at 5800.

Originally Posted by cig1988

I have a choice of just going with the blocks I have. Salt water exposed for apprx 8 years. All and all for another $10K I can go with a new Dart block all new internals & pondering the thought of stroking it. Stan

Originally Posted by AIR TIME

Oops The 592 Hp Numbers Were Done In 95 And The650hp Was 2001 And It Was Built Too 510 Ci 2001, If You Want I Can See What Specs Are On The Board About The 598. Art

Originally Posted by KAAMA

Stan, Not sure if you had already considered this or not, but if you're thinking about going from short deck to tall deck blocks, then you'll need to think about getting new tailpipes to fit the existing holes in your transom. Also, the center to center engine clearance may be an issue as well.

If you stay with a short deck block, then a 565cid (4.25" stroke x 4.600" piston with a 6.385" rod) engine would probably be about your limit for cubic inches.

Originally Posted by gg10

4.375 stroke, 6.735" rods, 1.27"cd, dart 345 heads, used an eldebrock victor insted of dart intake, just did a comp and the eldelbrock makes more tq and cheaper, spend savings at Wilson manifolds blueprinting intake, BLP carb, and crane hyd roller will make 750hp at 5500, good luck ,gg

Originally Posted by cig1988

Already spent the coin for the Dart's and have been marinized. I went with the Dart 345 cc head's with the water passages coated as well. Checked with Dart & they do not offer the coating for the blocks which sucks. Any speacs on this cam & is this proven dyno specs ?

Originally Posted by cstraub

With 345cc heads and if you are planning to keep the rpm around or under 6K, theh you need inches. I would consider a 4.375" stroke and either a 4.560 bore with OEM block or 4.600" with an after market. This would get you either a 572CID or a 582CID. Just had a customer with this 572 combo and OEM 990 heads make 680HP and 655#/ft of torque.

Originally Posted by cig1988

Definetly staying with short deck. As you said with the tail pipe height, I'm not messing with the transom. Is 565 the max ci on a short deck ?
Stan

Originally Posted by KAAMA

Stan, I'm no expert here, but I think if you go beyond 4.25" stroke on a short deck block it will have exessive wear problems on the cylinder bores.

Also, a 345cc head is kind of large for a 565cid engine although it will work, but as gg10 said you will leave a lot of torque on the table. However, being that you already own the heads now, you do have an option---you can send them to "JimV" and have him install some of his wedges in the ports and make the port smaller and bring back a bunch of torque and power for your cubic inches----so, you CAN make them work for you. If you have any questions you can call JimV's cell at 616-889-0928.

JimV works closely with "rmbuilder" aka Bob Madara of Marine Kinetics from N.Y. I am telling you---Bob Madara THE MAN with the cam! Bob's number is 585-654-8583. A word to the wise,....I would DEFINATELY call Bob BEFORE you make any final descisions on cam selection!

Have fun with your project!

Originally Posted by cig1988

Thanks Dave, will do.

Originally Posted by KAAMA

Oh, by the way....my name is Mark. "Dave" Wesseldyk is the owner of WESCO Racing---he's the guy who built my 565cid engines, Bob Madara supplied the hydraulic roller cams, and JimV did some port massaging on my AFR cnc ported heads and I am very pleased with how everything has turned out!