My Skater and new TU CNC 4 blade props
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What follows below, is my opinion, based on my testing. You should consult a professional, before attempting any of these tests or changes yourself.
This past weekend, I tried the Throttle Up CNC 14.75 x 31 4 blade props, on my boat, 30 Skater T/300XS. Compared to the 3 blade props they worked better at getting the boat on plane, quicker, easier, less vibration, they had better midrange acceleration, and wot performance, was 0.4mph faster. They do cause some additional stern lift, over 3 blade props, which makes the boat feels a bit looser, but it is manageable and water pressure is above 10lbs. In total, we have tried 8 different propellers: Merc Racing 14.5 x 32, 3 blade cleaver, lab finished Merc Racing 14.5 x 34, 3 blade cleaver, lab finished Merc Racing 15 x 32, 3 blade cleaver, double lab finished Merc Racing 15 x 32, 3 blade cleaver, lab finished Throttle-Up CNC 15 x 30, 5 blade, cleaver Throttle-Up CNC 14.75 x 30, 5 blade, cleaver Throttle-Up CNC 15 x 31, 4 blade, cleaver Throttle-Up CNC 14.75 x 31, 4 blade cleaver We have also tried 8 different setups: Props turning in Props turning out Prop shaft height, 7/8 above bottom Prop shaft height, 1 1/2 above bottom Prop shaft height, 1 5/8 above bottom Prop shaft height, 1 3/4 above bottom Toe out 1/4 Toe 0 The best setup is, 1 3/4 above the bottom, toe 0, props turning in, and a bottom modification “water ramps” to get the necessary water pressure. The 5 blade props just have way to much stern lift for my boat, which leave the best 3 blade and the best 4 blade prop. They are the MR 15 x 32, 3 blade cleaver, lab finish, and the TU CNC 14.75 x 31, 4 blade, cleaver. Here are the back to back runs for the 2 best props: Weather underground, NOAA, National Weather Service, and Weather Channel, reported the following at the time of my runs: Air temperature low/mid 90s Humidity 67% - 90% Heat index 105-110 MR 15 x 32, 3 blade cleaver lab TU CNC 14.75 x 31, 4 blade cleaver PORT STBD AVG MPH SLIP MR 5837 6005 5921 97.3 9.32% MR 6025 5909 5937 97.9 9.46% MR 5994 6009 6002 99.7 8.32% TU 6029 6216 6213 99.2 10.59% TU 6042 6257 6150 99.4 10.80% TU 6072 6261 6186 100.1 10.44% I scored each prop in 4 categories; getting on plane, mid range acceleration, wot speed, and handling, giving 1 point to the prop that won each category. The final score 3 points = TU CNC 14.75 x 31, 4 blade, cleaver 1 points = MR 15 x 32, 3 blade cleaver, lab finish For me, the Throttle-Up CNC 14.75 x 31, 4 blade cleaver, are my propellers of choice and will remain on my boat. |
Good post, good info, nice looking props.:D
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glad to see you get it going im close hopfully test tuesday
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Originally Posted by JIMKID Motorsports
(Post 2935816)
glad to see you get it going im close hopfully test tuesday
These new TU CNC 4 blade props are really very nice! Let me know how your test goes this Tuesday, and send some more pictures of engines in boat, drives, dash, and cockpit. |
Which Jack plates are you using?
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Originally Posted by skate
(Post 2949050)
Which Jack plates are you using?
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Thanks!
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how do you get access to so many different props to test them?? you aren't buying them all are you?
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Originally Posted by dbhammer
(Post 2952290)
how do you get access to so many different props to test them?? you aren't buying them all are you?
Throttle-Up will work with its customers to help them find the correct propeller. Top notch products and the best customer service I have ever seen in the marine industry. Do youself a favor, and call Julie at Throttle-UP. |
It's my understanding that TU is no longer in business?
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