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How much Faster will My boat will be with new Power??

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Old 10-11-2002, 06:06 PM
  #11
eTman
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no faster unless you prop up in pitch.
 
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Old 10-11-2002, 06:14 PM
  #12
Cat & Mice
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Well thats the thing.

The current setup is 1.36 gears w/ 36 pitch Bravo's

I am able to borrow a set of 1.24 gears for a speed run and I think I will be getting a set of the Hydromative 5 blades

The 5 blades have been doing very well with high x-dim.

with the 36 4 blade I had quite a bit of slip. I am hoping the 5 blades are better.

Pyle
 
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Old 10-11-2002, 06:45 PM
  #13
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Inputing your past setup into the computer, with new motors it comes in at 152 mph.

When you read that article about the 144 pass they did not know at what RPM they were at when they got that speed. After they set that record both driver (Bob Teague???) & the article writer both said they did not want to try again. Boat may run good at 131 but at 139 it may take off. Has anyone had a 28 faster???

Do I want to ride with you @ 151? NO, I will just sit on side, & watch.
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Old 10-11-2002, 06:59 PM
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Thats a good question.

Does anyone know of a 28 Daytona running over 130 mph??

Pyle
 
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Old 10-11-2002, 07:20 PM
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C+M, What is the weight, what props, ratio, rpm for that 131mph? Any more dyno numbers-4000 thru 6000?
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Old 10-11-2002, 10:45 PM
  #16
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Cobra, I don't know the exact wieght of the boat, but I don't have anything in the cabin, and the interior is all light.

1.36 36pitch 6000 rpm was 131mph

I have both the dyno sheets for my old motors and the new one's.
what info do you want?

I only have the numbers from 3000-6000 on the new motors.

Pyle
 
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Old 10-11-2002, 11:35 PM
  #17
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The dyno curve for the new motors every 500 rpm 3-6,000rpm.

I made some up--6000lbs, 33" prop, 1.12 [email protected]
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Old 10-11-2002, 11:53 PM
  #18
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Sounds like it will go too fast.

150 in 28 feet. Please point your weapon west.
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Old 10-12-2002, 12:11 PM
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Cobra, Here is the Dyno chart from 3000-6000
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How much Faster will My boat will be with new Power??-406chart.jpg  
 
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Old 10-12-2002, 07:37 PM
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Nice Curves!.. Talk about a flat TQ curve.

If I use your old data there is 15% slip and new engines=142.5mph.

If I use light cat (6000lbs) and 5% slip, new engines=146mph.
(1.26/34"/5850rpm)
or 145mph with 1.36/36"/5942rpm.

Same ol' thing --TEST and TRIAL.
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