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New Prop Real world numbers-gctid399697

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    New Prop Real world numbers-gctid399697

    I currently have the factory 14.25 x 21p. At 4800 rpm's I am going 40 mph. If I push it I can go 5000 rpm's and 43 mph. (GPS verified)

    I'm trading up for a turning point Hustler 14.25 x 19p since the kids are getting to the age where they want to be pulled on the tube. Most of the time before we reach a safe area to do so lol. It should be here in a week or so at which time I will post the results.

    Always nice to see real world numbers on prop testing.

    Happy Boating

    Shane

    #2
    I don't know if there is a question here or not, but being under-propped (5k rpm with the 21P) is quite a bit under-propped, but only poses an over-RPM issues if you're not paying attention.

    With your smaller hull, it's more likely that a load change (throughout the course of the day) will affect planing and engine load.

    2-3 people one outing -vs- 5-6 people another outing.

    With this prop, I'd think that you are safe within that range of people (baring skiers/tubers).

    Just stay clear of the 5k RPM range!

    As for pulling skiers and tubers, going down in pitch (19P) is the correct thing to be doing.

    .
    Rick E. Gresham, Oregon
    2850 Bounty Sedan Flybridge model
    Twin 280 HP 5.7's w/ Closed Cooling
    Volvo Penta DuoProp Drives
    Kohler 4 CZ Gen Set

    Comment


      #3
      if the Hustler is a 3-blade too I think you will be under-propped. I have a 3-blade that size from the PO and tried it once. Hole shot didn't get better and watching WOT sucked. Top speed was lower by 3mph too (at 4800RPM). I'm back to the stock 14.25x21p. Next prop will be a 4-blade 14.25x19p Solas Amita.

      If the Hustler is a 4-blade: good size but a 20p might have worked well too as you are above max WOT already. I had the chance to test the Solas 4-blade and loved it. Better hole shot and ~3mph higher top speed (grain of salt: not same conditions).

      Unfortunately props are something to try out. Every boat is different and every one likes different behaviors.

      Comment


        #4
        I figured I'd be under propped, but I rarely run at full throttle. With the 21p on, it tended to be a pig on take off even with smart tabs on. I'll post results, good or bad, when done and for the price of the Hustler Ill always have a spare.

        Comment


          #5
          Shwane wrote:
          With the 21p on, it tended to be a pig on take off even with smart tabs on.
          really surprises me unless Bayliner made big negative changes to the hull from 1996 to 2007. With the stock prop mine goes on plane as fast as I could wish for even with a skier or tube in tow. And that's with another 4 adults on board and I have no smart tabs just 4 holes in the drive where the PO had mounted a Stingray fin which made performance worse. All I have to do is to trim all the way down and give it throttle. Could it be a weight distribution problem? That's where I can ruin the performance significantly. She seems to like some additional weight in the bow as funny as this sounds. The 4-blade Solas I tested was a tad better but not enough to immediately order one despite the fact that they are really cheap.....

          As much as can be said about workmanship of Bayliners or better lack of it: their hull designs are A+ for the ones I had a chance to drive (16-24ft, 1993 to 2005). This was actually the reason for me to look for a Bayliner. Good designs, sometimes questionable workmanship and well, undeserved strange reputation = excellent low cost used boats! Heck, for a few $ I can replace all the low end stuff with quality hardware once it has broken (nothing yet).

          Comment


            #6
            As much as can be said about workmanship of Bayliners or better lack of it: their hull designs are A+ for the ones I had a chance to drive (16-24ft, 1993 to 2005). This was actually the reason for me to look for a Bayliner. Good designs, sometimes questionable workmanship and well, undeserved strange reputation = excellent low cost used boats! Heck, for a few $ I can replace all the low end stuff with quality hardware once it has broken (nothing yet).

            I Agree

            Comment


              #7
              kjs wrote:
              really surprises me unless Bayliner made big negative changes to the hull from 1996 to 2007. With the stock prop mine goes on plane as fast as I could wish for even with a skier or tube in tow. And that's with another 4 adults on board and I have no smart tabs just 4 holes in the drive where the PO had mounted a Stingray fin which made performance worse. All I have to do is to trim all the way down and give it throttle. Could it be a weight distribution problem? That's where I can ruin the performance significantly. She seems to like some additional weight in the bow as funny as this sounds. The 4-blade Solas I tested was a tad better but not enough to immediately order one despite the fact that they are really cheap.....

              As much as can be said about workmanship of Bayliners or better lack of it: their hull designs are A+ for the ones I had a chance to drive (16-24ft, 1993 to 2005). This was actually the reason for me to look for a Bayliner. Good designs, sometimes questionable workmanship and well, undeserved strange reputation = excellent low cost used boats! Heck, for a few $ I can replace all the low end stuff with quality hardware once it has broken (nothing yet).
              weighting the boat properly is a huge deal in our boats. I was out with a total of 4 people cruising around on the river doing a little wakeboarding (currently using the solas amita 4 blade 17" pitch prop which is awesome for hole shot and wakeboarding) and while pulling a boarder out of the water started messing around with weight variations in the boat. I started with 2 ladies in the front bowrider seats while pulling a buddy out of the water; almost instant plane and tons of power and he popped right out of the water. I then moved the ladies to the back of the boat for take off; bow came up way higher than usual and the *** end just dragged through the water and my buddy just got dragged along [if we had been wakesurfing then the wake we put out would have been perfect :-)] so check your weight situation

              Comment


                #8
                Weight distribution is a non issue for me. I'm just looking for better low to mid range performance. I very seldom run that little 4 banger at full throttle. 30-35 mph is my usual cruising speed. If I do run wide open it is just to blow the carbon out so to speak. Hopefully the 19p will accomplish the performance increase I'm looking for. Time will tell, I'm chomping at the bit wanting to go test it. I'm stuck 68 miles offshore right now and all I can do is track my order. (lol)

                Comment


                  #9
                  Here's the numbers:

                  3.0 Alpha one

                  Myself and seven year old boy. Full tank of gas and gear (+/- 100 lbs)

                  89 degrees F, sea level

                  0 - 40 mph is 13.3 seconds (4 second gain)

                  20 - 40 mph (5.7 seconds) Probably my favorite testing gain

                  at 4000 rpm 33.1 mph (300 rpm higher)

                  at 4800 rpm 39.9 mph (1 mph loss)

                  top speed was 41 mph (2 mph loss)

                  and to stay on plane slowest I could get was 15 mph before she wanted to go bow up

                  I'm very pleased with it. It jumps up out of the water and gets to top speed in no time with no wash out in a tight corner. Also, idle speed is slightly faster.

                  Comment


                    #10
                    I think the 3 blade 19" prop is the best for the 3.0. I like mine. Top speed is not a huge issue for me, if I was interested in that I'd have a Baja.

                    Comment


                      #11
                      jf185br wrote:
                      I think the 3 blade 19" prop is the best for the 3.0. I like mine. Top speed is not a huge issue for me, if I was interested in that I'd have a Baja.
                      I hope you're right! I just made arrangements to buy a 19" Mercury Vengeance off Craigslist tomorrow evening. Will report results after the weekend...

                      Comment


                        #12
                        jf185br wrote:
                        I think the 3 blade 19" prop is the best for the 3.0. I like mine. Top speed is not a huge issue for me, if I was interested in that I'd have a Baja.
                        I agree. The low to mid range performance is outstanding. And only lost 2-4 mph on the top end

                        Comment


                          #13
                          Looks like I should get a 19P to replace my 21...

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