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Cigarette Cafe Racer prop choice
Hoping for a little guidance here - thanks in advance.
1991 Cigarette Cafe Racer, Bravo 1, Currently spinning Bravo 1 4-blade 26P. Rev limiter on new engines has been set at 5800 but I am barely seeing 5000. Depending on conditions / trim that will get me to low 70s. This is with fresh 550ci motors - dyno sheet below. Wondering what direction to go in, if any. https://cimg2.ibsrv.net/gimg/www.off...d8bcb982db.jpg |
Somethings seems off, at 640hp only spinning a 26p 5k..are the drives 1.5 ?
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Originally Posted by F-2 Speedy
(Post 4681284)
Somethings seems off, at 640hp only spinning a 26p 5k..are the drives 1.5 ?
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What exhaust did you have on dyno and in the boat? |
You may not have enough air flow into engine bay. |
You may not have enough air flow into engine bay. I had this problem last year. |
Originally Posted by 14 apache
(Post 4681307)
What exhaust did you have on dyno and in the boat? https://cimg1.ibsrv.net/gimg/www.off...b8e0a28441.jpg |
Originally Posted by ph1971
(Post 4681309)
You may not have enough air flow into engine bay. I had this problem last year. |
Also, I should mention, it seems like the last few clicks of throttle position towards WOT do nothing to increase RPM or speed.
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I opened the decorative unoperable scoops on the side of my boat. I learned this was th problem by opening the hatch a crack and then test riding. |
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