Props in vs. out
10-14-2011, 03:50 PM
#21
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On mine, I started out in and switched to out. Turning in pulls the stern down, turning out lifts the stern. On a 32 with twin big blocks, there is an awful lot of weight aft, so at everything under about 50 or so, the boat needs tabs down. Also, in rough ocean conditions here in the Pacific, the boat almost always needs some tabs down.
I found that by having the props turning in, I needed a little less tab, so it ran faster at partial throttle.
I could not measure a difference at top end, but It was easy to see the improvement at partial throttle.
Also, I found that its now much easier -- automatic really -- to turn the boat on a dime. Less radical turns are basically the same. However, moving the boat sideways when approaching the trailer to haul it out is a little tougher.
I am sure that Reggie set them up for max speed, so I'd stuck with what he did originally if you are all about max speed.
But try it: its easy to experiment if you've got Bravos.
I found that by having the props turning in, I needed a little less tab, so it ran faster at partial throttle.
I could not measure a difference at top end, but It was easy to see the improvement at partial throttle.
Also, I found that its now much easier -- automatic really -- to turn the boat on a dime. Less radical turns are basically the same. However, moving the boat sideways when approaching the trailer to haul it out is a little tougher.
I am sure that Reggie set them up for max speed, so I'd stuck with what he did originally if you are all about max speed.
But try it: its easy to experiment if you've got Bravos.
10-14-2011, 06:18 PM
#22
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Thanks to everyone for the input!
Mike
10-14-2011, 07:01 PM
#23
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Spinning in can substantially increase top speed on big boats, like say a old 38 Top Gun, 42 Fountain, etc. Mainly because it helps carry the nose out of the water, with less positive trim, and reduced wetted surface.
Rarely does spinning out net a greater top speed on most V bottoms, stepped or not. Spinning out made my old 38 Fever run flat as a pancake, even at top speed the hull was wet. Spinning in, is quite a bit faster, and the boat will run on its pad.
10-14-2011, 07:31 PM
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10-14-2011, 07:49 PM
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Thanks!!!
Randy at Cobra just rebuilt my 525's and added Whipple's. They hit 784 on the dyno. With stock Bravo XR's we had a best of 103. Hopefully with the -2 Imco lowers and find the right props we should pick up some speed. I'm planning on sending it boat to RF over the winter so Reggie can make it really fly.
Randy at Cobra just rebuilt my 525's and added Whipple's. They hit 784 on the dyno. With stock Bravo XR's we had a best of 103. Hopefully with the -2 Imco lowers and find the right props we should pick up some speed. I'm planning on sending it boat to RF over the winter so Reggie can make it really fly.
10-14-2011, 07:52 PM
#26
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Thanks!!!
Randy at Cobra just rebuilt my 525's and added Whipple's. They hit 784 on the dyno. With stock Bravo XR's we had a best of 103. Hopefully with the -2 Imco lowers and find the right props we should pick up some speed. I'm planning on sending it boat to RF over the winter so Reggie can make it really fly.
Randy at Cobra just rebuilt my 525's and added Whipple's. They hit 784 on the dyno. With stock Bravo XR's we had a best of 103. Hopefully with the -2 Imco lowers and find the right props we should pick up some speed. I'm planning on sending it boat to RF over the winter so Reggie can make it really fly.
SWEET!!!
Keep us posted on the -2's. Do you know what your X is now?
10-14-2011, 11:02 PM
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