river_rich
Member
I have a 13' x 7'6" diamondback with a 355 sbc (I'm guessing just a little over 300hp) with a Ch2 2:1 belt drive. I'm running a 80" R series 2 blade that is 13" wide. New style hub. I have them pitched at 13. 5000 rpm WOT 3400 rpm cruising speed I believe.
My other boat that was my dad's is a 14' x 7'6" diamondback with a CT350 otherwise known as the 602 to you race car guys. It is 350hp. Ch3 2.3:1 belt drive with a 78" R series 2 blade old style hub and blades. It is 12" wide. I have them pitched almost to the max at 3. 5000 rpm WOT 3400 rpm cruising speed I believe.
My question for y'all is, would it be more beneficial performance wise and longevity of the engines to swap the props on the boats. 80" to the 14' with more power and 2.3:1 reduction. 78" to the 13' with the 2:1 ratio. Both engines only have one season on them since break in.
My other boat that was my dad's is a 14' x 7'6" diamondback with a CT350 otherwise known as the 602 to you race car guys. It is 350hp. Ch3 2.3:1 belt drive with a 78" R series 2 blade old style hub and blades. It is 12" wide. I have them pitched almost to the max at 3. 5000 rpm WOT 3400 rpm cruising speed I believe.
My question for y'all is, would it be more beneficial performance wise and longevity of the engines to swap the props on the boats. 80" to the 14' with more power and 2.3:1 reduction. 78" to the 13' with the 2:1 ratio. Both engines only have one season on them since break in.