is 23 outlaw with MAG really a 70mph boat?
05-16-2011, 04:30 PM
#21
Registered
Join Date: Jun 2006
Location: Belle River,Ontario
Posts: 109
Likes: 0
Received 0 Likes
on
0 Posts
Well it could have been 8% with a 1.36 gear @ 4800 rpm's, But dosen't the 496MAG make the most power @ 4700 rpm's? And where is the rev limiter on a 496MAG?
And with a 1,5 gear @ 4800 rpm's -2%. There it is, that magical negative slip again.
Sorry but I call
on that one. Maybe on the trailer.
And with a 1,5 gear @ 4800 rpm's -2%. There it is, that magical negative slip again.
Sorry but I call
on that one. Maybe on the trailer.
05-16-2011, 05:28 PM
#22
That boat weights 5000 lbs or close wet & ready.
http://go-fast.com/boat_speed_predictions.htm
http://go-fast.com/Prop_Slip_Calculator.htm
Enter in the correct values and see for yourself if this is BS or not.
http://go-fast.com/boat_speed_predictions.htm
http://go-fast.com/Prop_Slip_Calculator.htm
Enter in the correct values and see for yourself if this is BS or not.
05-16-2011, 05:52 PM
#23
Registered
Join Date: Jun 2006
Location: Belle River,Ontario
Posts: 109
Likes: 0
Received 0 Likes
on
0 Posts
That boat weights 5000 lbs or close wet & ready.
http://go-fast.com/boat_speed_predictions.htm
http://go-fast.com/Prop_Slip_Calculator.htm
Enter in the correct values and see for yourself if this is BS or not.
http://go-fast.com/boat_speed_predictions.htm
http://go-fast.com/Prop_Slip_Calculator.htm
Enter in the correct values and see for yourself if this is BS or not.
05-16-2011, 05:56 PM
#24
My 29 had a 6500 dry weight and weighs in at almost 8k loaded and ready.
Trust me, the boat is 5000 lbs with a driver and a big block and some gear.
05-16-2011, 06:02 PM
#26
Registered
Join Date: Jun 2006
Location: Belle River,Ontario
Posts: 109
Likes: 0
Received 0 Likes
on
0 Posts
Tried it again..
4612lbs for boat, Horsepower 372, constant 250, speed was 71.
That is what came up for me....and I believe I'm high on what the weight was.
Did I do it right...BTW, my 25 Outlaw is 4750 dry.. There is no way the 23 is heaver then mine...
4612lbs for boat, Horsepower 372, constant 250, speed was 71.
That is what came up for me....and I believe I'm high on what the weight was.
Did I do it right...BTW, my 25 Outlaw is 4750 dry.. There is no way the 23 is heaver then mine...
05-16-2011, 06:07 PM
#27
Registered
Join Date: Jun 2006
Location: Belle River,Ontario
Posts: 109
Likes: 0
Received 0 Likes
on
0 Posts
Well something is wrong here...mine runs 65 GPS with me and a light fuel load.... I also have the 375 mag. So you are saying a 23 Outlaw at 5000lbs is a 62 mph boat?? That would put mine around a 57 to 58..lol.
Don't think so....
Don't think so....
Last edited by Twin-Kyle; 05-16-2011 at 06:09 PM.
05-16-2011, 06:08 PM
#28
23 pitch + 1.5 gear + 4900RPM @ 70 mph = 1%
23 pitch + 1.5 gear + 4900RPM @ 65 mph = 8%
25 pitch + 1.5 gear + 4900 RPM @ 70 mph = 9%
We know it isn't a stock 23p wheel on there, assuming we've got the correct numbers for speed and RPM because there ain't a boat out there that runs 1% slip.
Where it gets even more interesting is when you add in the speed calculator numbers and the boat comes up with a 62 mph speed (theoretical) using a 5000 lb weight. Speed increases to 65 at 4500 lbs using 375hp.
Those numbers are believable. Back it up with the correct and true RPM numbers and GPS speed numbers you'll get the truth.
Using the numbers we were given for GPS speed and assuming almost hitting the rev limiter for RPM this dude's story isn't very realistic.
23 pitch + 1.5 gear + 4900RPM @ 65 mph = 8%
25 pitch + 1.5 gear + 4900 RPM @ 70 mph = 9%
We know it isn't a stock 23p wheel on there, assuming we've got the correct numbers for speed and RPM because there ain't a boat out there that runs 1% slip.
Where it gets even more interesting is when you add in the speed calculator numbers and the boat comes up with a 62 mph speed (theoretical) using a 5000 lb weight. Speed increases to 65 at 4500 lbs using 375hp.
Those numbers are believable. Back it up with the correct and true RPM numbers and GPS speed numbers you'll get the truth.
Using the numbers we were given for GPS speed and assuming almost hitting the rev limiter for RPM this dude's story isn't very realistic.
05-16-2011, 06:16 PM
#29
Most people don't weigh what I do (230) and that is my default number on the calculator spreadsheet I use.So say it's 4250 and you're at 67 with 375 hp.
05-16-2011, 06:38 PM
#30
Registered
Join Date: Apr 2009
Location: Denmark and hopefully some place nice
Posts: 1,852
Likes: 0
Received 1 Like
on
1 Post
Test Results (Printer Friendly Page)
Test Power: 1 x 375-hp MerCruiser 496 MAG Range
RPM MPH Knots Total GPH MPG NMPG Stat. Mile NM KM KPH LPH KPL dBA
650 4.8 4.1 1.2 3.96 3.44 285 248 459 7.72 4.5 1.68 67
1000 6.2 5.4 2.3 2.76 2.40 198 173 319 9.98 8.7 1.17 69
1500 7.8 6.7 3.9 2.01 1.75 145 126 233 12.55 14.8 0.85 73
2000 8.5 7.4 7.0 1.22 1.06 88 77 142 13.68 26.5 0.52 78
2500 27.8 24.2 8.0 3.48 3.02 250 218 402 44.74 30.3 1.48 81
3000 35.0 30.4 10.7 3.328 2.85 236 205 380 56.33 40.5 1.42 83
3500 40.5 35.2 14.3 2.84 2.47 205 178 330 65.18 54.1 1.21 85
4000 51.1 44.4 20.2 2.53 2.20 182 158 293 82.24 76.5 1.08 86
4500 58.1 50.5 30.2 1.93 1.68 139 121 224 93.5 114.3 0.82 91
4800 62.4 54.2 32.0 1.95 1.70 141 122 227 100.42 121.1 0.83 93
The Performance 245 ran 62.5 with a 23" thru a 1.5 drive, and the 247 Islander ran 60.1. Both of these share hull with the 23OL.
I think so.
