mnm99
Well-Known Member
At the start of the season I posted these results ( in Blue ). I have to give an update. So I pushed it a little bit the last weekend of the season to see what she can do. I was pleasantly surprised. With calm water I was able to hit 4700 rpm with 8 people on board at 41.5 MPH... I'm going to keep the props where they are. The engines aren't lagging and I can still cruise at 30 mph at 3500 rpm.
I got some results...Very pleased so far....I can't really give a real accurate result since there was a pretty bad chop and I was heading into 15mph winds, but even then I think you will be impressed! So a recap of the first post.
"At the end of this season with 4 people and loaded normal I can hit 4630 WOT, , no new bottom paint since 5 years ago, Full tank of gas, fresh water and loaded with beer. Even with the 4630 rpm do you think I can add another degree of pitch? Of course the prop guy will advise me, but I'm thinking my RPM will drop 200 rpm to 4400 and still be good. I'd like to gain a couple MPH if possible. The range is 4200-4600.
3440 I'm at 26 mph,
3500 I'm at 27 mph. "
New results....
I can stay on plane at 18 mph was 22 before
3400 I'm at 28 mph = 2 plus gain
3500 I'm at 30 mph = 3 gain
Went from 21 pitch to 22 with med cup.
21.5 to 22.5 with med cup.
I gained 3 mph and I was still able to hit 4650 rpm at 39 mph. It was even a bit more than last year and gained speed., but really wasn't a test because it was so choppy and I pulled back quick.. The bottom paint was pretty good last year. The changes I did was add an additional pitch and balance. Boat is smooth a silk too. These results were with the same load as last year. Full tanks of gas, full water tank, loaded with beer, bedding , 2 people exc...
I got some results...Very pleased so far....I can't really give a real accurate result since there was a pretty bad chop and I was heading into 15mph winds, but even then I think you will be impressed! So a recap of the first post.
"At the end of this season with 4 people and loaded normal I can hit 4630 WOT, , no new bottom paint since 5 years ago, Full tank of gas, fresh water and loaded with beer. Even with the 4630 rpm do you think I can add another degree of pitch? Of course the prop guy will advise me, but I'm thinking my RPM will drop 200 rpm to 4400 and still be good. I'd like to gain a couple MPH if possible. The range is 4200-4600.
3440 I'm at 26 mph,
3500 I'm at 27 mph. "
New results....
I can stay on plane at 18 mph was 22 before
3400 I'm at 28 mph = 2 plus gain
3500 I'm at 30 mph = 3 gain
Went from 21 pitch to 22 with med cup.
21.5 to 22.5 with med cup.
I gained 3 mph and I was still able to hit 4650 rpm at 39 mph. It was even a bit more than last year and gained speed., but really wasn't a test because it was so choppy and I pulled back quick.. The bottom paint was pretty good last year. The changes I did was add an additional pitch and balance. Boat is smooth a silk too. These results were with the same load as last year. Full tanks of gas, full water tank, loaded with beer, bedding , 2 people exc...