|
2019 34' Nor Tech 3-350 Mercury's
Best prop for top speed any thought's?
|
Potentially BBLADES R5's at 15 to 15.25" diameter.
Will need a other propeller WOT rpm and speed to determine the best pitch casting to work with. Brett |
rev 4 25"P 6350 rpm all 3 engines
|
Originally Posted by Ran C
(Post 4654163)
rev 4 25"P 6350 rpm all 3 engines
Brett |
6350 rpm's 3 people 600lbs 150 gals fuel light gear stock rev 4 25'P 1.75 outdrive 90 temp 1'chop 95% humid.GPS 79.8mph
|
Originally Posted by Ran C
(Post 4654186)
6350 rpm's 3 people 600lbs 150 gals fuel light gear stock rev 4 25'P 1.75 outdrive 90 temp 1'chop 95% humid.GPS 79.8mph
I would consider a Labbed set of Bravo 1's in 26 pitch. Your slip is only 6% which is to good to be true but does suggest you are running efficient. The Labbed Bravo's will increase the top speed by a few mph. Brett |
Totally different situation, but just repowered my 34 that had twin 300s and 21P Rev 4s. Went to twin 400s, raised the new engines up one hole from where NT sets them, and went to 22P B1s. Boat behaves completely different. Use to have to spin the Rev 4s to 5k RPM to get on plain. Boat was always nose happy unless you ran above 40, and boat fell off plain around 30-32 MPH. B1s gave me way more stern lift. Boat will plain giving it 2700/2800 RPM, it stays on plain down to about 21 MPH, and it is never nose happy. It runs fantastic in sloppy LOTO conditions, it could actually use a bit more bow lift when running on glass. Still playing with the new props, will likely tweak them this winter, may be a little over propped. I can get them to 6900 RPM, but only by over trimming so I get more slip. The last 300+ RPM doesn't increase MPH.
Long story short, I will never go back to Rev 4s, it runs way better with B1s. But I'm not sure a triple engine set up would see such significant improvement. Plus I doubt trips has some of the issues I experienced with the Rev 4s. As a side bonus, my fuel burn cruising at 45-50 went from 1.5MPG to 1.8, sometimes 1.9MPG. |
Originally Posted by Mentalpause
(Post 4655010)
Totally different situation, but just repowered my 34 that had twin 300s and 21P Rev 4s. Went to twin 400s, raised the new engines up one hole from where NT sets them, and went to 22P B1s. Boat behaves completely different. Use to have to spin the Rev 4s to 5k RPM to get on plain. Boat was always nose happy unless you ran above 40, and boat fell off plain around 30-32 MPH. B1s gave me way more stern lift. Boat will plain giving it 2700/2800 RPM, it stays on plain down to about 21 MPH, and it is never nose happy. It runs fantastic in sloppy LOTO conditions, it could actually use a bit more bow lift when running on glass. Still playing with the new props, will likely tweak them this winter, may be a little over propped. I can get them to 6900 RPM, but only by over trimming so I get more slip. The last 300+ RPM doesn't increase MPH.
Long story short, I will never go back to Rev 4s, it runs way better with B1s. But I'm not sure a triple engine set up would see such significant improvement. Plus I doubt trips has some of the issues I experienced with the Rev 4s. As a side bonus, my fuel burn cruising at 45-50 went from 1.5MPG to 1.8, sometimes 1.9MPG. Also, we have a Labbing recipe to gain rpm and bow lift for Bravo 1 propellers that works very well. |
Originally Posted by bbladesprops
(Post 4655016)
Consider trying our 5-SPEED props. Your fuel economy with improve. So will your ability to stay on plane at even lower speeds.
Also, we have a Labbing recipe to gain rpm and bow lift for Bravo 1 propellers that works very well. |
A small diameter 5 blade will be fine as long as you aren't drag racing or flying the boat over waves coming back in with the props bouncing off the limiters.
Let us know if we can help with the Bravo 1's. Brett |
| All times are GMT -5. The time now is 09:05 AM. |
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.