What is going on ???
#1
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Join Date: Jun 2006
Location: West Chester, PA
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What is going on ???
I have run 3 props: a 25 3 blade a 27 3 blade and a 26 4 blade and I still can only get 68 mph out of my boat. The boat has a 500 hp 600 lb of torque at 4100 rpm's. The only diff is that the 4 blade does not seem to get the nose out of the water as much.
#5
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We need a little more data:
What is your gear ratio?
What is the WOT RPM with each of the props?
What is the MPH with each of the props via gps?
With a little data we can take a look for you.
Julie
What is your gear ratio?
What is the WOT RPM with each of the props?
What is the MPH with each of the props via gps?
With a little data we can take a look for you.
Julie
#7
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68mph at 5000rpm sounds about right spinning a 25pM+ or 26pB1 on your boat.
If you are still able to pull 5000rpm with a 27pM+ then you should be going faster than with a 25p.
What size engine?
454s normally make 500HP at about 5600rpm and 502s around 5200rpm.
If you are still able to pull 5000rpm with a 27pM+ then you should be going faster than with a 25p.
What size engine?
454s normally make 500HP at about 5600rpm and 502s around 5200rpm.
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Patrick
Patrick