572 DFI Procharger Build
This is my personal boat. I wanted something tech, and fast. My goal is 115 mph... The boat a 2005, 29 Kryptonite.
I finally made up my mind, on the major components for my Kryptonite motor build. I was struggling between a smaller CI motor and some RPM's and a Large motor and not so many RPM's the issue was in which size prop I could use. I didn't want to go to 1.25 gears and didn't want to swing a monster prop on a single engine smaller boat. I wanted the boat to have more of an influence of where we were going than the prop.. So I decided to settle in the middle and order a Merlin III tall deck. It will be a 572ci with a 4.375 stroke and 4.560 bore. I will set it up to spin between 6000-6200. That gives me a few hundred RPM's of safety margin. Some of the things I have firmly decided on 572, AFR 357 heads, M-5 Procharger, Accel DFI. I am ordering the Block and heads Monday or Tuesday. Procharger is having a good sale starting Dec 15th so I am waiting for then to order the blower. Once the motor is built I am going to have Performance Marine (Saris Racing) set it up on the Dyno, and fine tune the DFI on the water after that. |
You might want to consider a 4.5 crank and the Fast Ecu,
more torque and easier to tune. |
Do you have any parts yet? I have a brand new 572 rotating assembly 4.5 bore and 4.5 stroke MerlinIII. project got put on hold I'd make you a good deal on. It was built by Andy Costello here locally same guy who does GLH's engines for the DBI boat. http://www.offshoreonly.com/forums/g...rking-mti.html
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Originally Posted by GPM
(Post 3005088)
You might want to consider a 4.5 crank and the Fast Ecu,
more torque and easier to tune. |
Originally Posted by Sunshadow
(Post 3005182)
Do you have any parts yet? I have a brand new 572 rotating assembly 4.5 bore and 4.5 stroke MerlinIII. project got put on hold I'd make you a good deal on. It was built by Andy Costello here locally same guy who does GLH's engines for the DBI boat. http://www.offshoreonly.com/forums/g...rking-mti.html
It is important for me to build the motor myself. but thanks for the offer. |
Originally Posted by DonRoc
(Post 3005291)
I have some parts on order. I am going with the 4.375 stroke and 4.560 bore.
It is important for me to build the motor myself. but thanks for the offer. |
Originally Posted by DonRoc
(Post 3005285)
Maybe some more Tq with the longer stroke but less RPM's. I want to turn a little smaller prop, so I need the RPM's. to make my goal. And I really dont need any more torque. Remember its a 29', that really is a 27' with a platform. With the motor it is about 4,000#.
All Procharged, the 548 and 583 were lazy compared to the 598 and 615. I run the 598 @ 7500 when I go to the shootouts. Best of luck to you. |
Originally Posted by GPM
(Post 3005348)
That's about the same weight as my 26, I tried the 4.25, 4.375, 4.5 and 4.625 cranks. 548, 583, 598, and 615 cid.
All Procharged, the 548 and 583 were lazy compared to the 598 and 615. I run the 598 @ 7500 when I go to the shootouts. Best of luck to you. |
Originally Posted by GPM
(Post 3005348)
That's about the same weight as my 26, I tried the 4.25, 4.375, 4.5 and 4.625 cranks. 548, 583, 598, and 615 cid.
All Procharged, the 548 and 583 were lazy compared to the 598 and 615. I run the 598 @ 7500 when I go to the shootouts. Best of luck to you. |
Originally Posted by Sunshadow
(Post 3005311)
Cool, post your progress with pics. We'll watch.
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