The Bullet Thread
#684
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Joined: Feb 2008
Posts: 6,755
Likes: 152
From: Connecticut
#687
Registered


Joined: Jun 2004
Posts: 66
Likes: 0
From: Switzerland
We tried with 28pitch lab finished props, Bravo 1 drive, +590hp and couldn't get more than 4500-4600 rpm. That made around 68 mph... We now limited the rpm's to 4200 for running the engine in only. It does good 60mph with 4000 rpm. Next week we will change to 26pitch lab finished Bravo 1 (4 blades) and see what happens... On the dyno we had these 590 - 600 hp with around 5200-5300 rpm. So, the prob is definitely to big to get these hp's comming up. I'll keep you updated... Cheers!
#688
Registered

Joined: Feb 2008
Posts: 6,755
Likes: 152
From: Connecticut
We tried with 28pitch lab finished props, Bravo 1 drive, +590hp and couldn't get more than 4500-4600 rpm. That made around 68 mph... We now limited the rpm's to 4200 for running the engine in only. It does good 60mph with 4000 rpm. Next week we will change to 26pitch lab finished Bravo 1 (4 blades) and see what happens... On the dyno we had these 590 - 600 hp with around 5200-5300 rpm. So, the prob is definitely to big to get these hp's comming up. I'll keep you updated... Cheers!
#689
Sorry haven't posted sooner, been using the camper alot this summer and built a new garage (never used the boat once and full of fuel, now I have to winterize it) The motors dynoed at 572hp (using a single 800 carb, 86/94 jets if I remember), I am running used B1 26p props (never had them labbed or checked) with a bravo 1.5. My WOT is 5000-5300 approx. (tachs started bouncing around at high rpm, put resistor plugs in this season but never ran the boat) I am running low to mid 70's as is. I have a pair of 420 blowers that I would like to swap out over the winter, but I also have to install the dog dishes in the hatch for clearance. No transom notch by the way.



