prop selection
05-23-2005, 06:51 PM
#1
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Location: CAPE CORAL, FLORIDA
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prop selection
Here Is A Question For The Professionals.
Currently Iam Doing Some Motor And Drive Upgrades To My 99 32 Fountain Fever.
Stock Power Is T/502 Bravo 1 Drives Running 26 Hydromotives Turning 5000 Rpm -1.50 Drive Ratios @77mph Gps
New Power Will Be The Original 502's With Prochargers And Intercoolers From Lavorsi Marine
They Claim 620hp Per Motor, I Have Upgraded The Upper Units To Bravo Xr 1.5 Ratios, Kept The Lower Units As They Are In Great Shape.
My Question Is What Propellers Do I Need To Upgrade To, I Have Gotten Many Suggestions, One Being 17.5 X 30 Bravo's. Need Some Help Before Laying Out The $$$$$$$$.
Currently Iam Doing Some Motor And Drive Upgrades To My 99 32 Fountain Fever.
Stock Power Is T/502 Bravo 1 Drives Running 26 Hydromotives Turning 5000 Rpm -1.50 Drive Ratios @77mph Gps
New Power Will Be The Original 502's With Prochargers And Intercoolers From Lavorsi Marine
They Claim 620hp Per Motor, I Have Upgraded The Upper Units To Bravo Xr 1.5 Ratios, Kept The Lower Units As They Are In Great Shape.
My Question Is What Propellers Do I Need To Upgrade To, I Have Gotten Many Suggestions, One Being 17.5 X 30 Bravo's. Need Some Help Before Laying Out The $$$$$$$$.
05-23-2005, 11:26 PM
#2
Re: prop selection
Without more info on your boat and motors, here is a decent estimate of your boat's performance with 15.25 x 33" Bravo 1's. I have seen slightly newer Fountain hulls with similar power turning even higher pitch props than that. Depends on your drive height.
Stop by www.speedboatperformance.com, and you can run the program with your exact setup and see for yourself!
Manufacturer: Fountain
Model: 32
Length: 32 ft
Beam: 8 ft 4 in
Weight: 8800 lb
Deadrise Angle: 22.5 deg
Hull Depth: 6 ft
Number of Running Strakes: 4
Number of Transverse Ventilated Steps: 1
Hull has a keelpad
Boat has an open cockpit
Engine information:
Boat has 2 x 502 c.i. Normal engines installed
Engine Redline: 5300 RPM
Peak BHP is 620 BHP occuring at 5300 RPM
Peak Torque is 700 lb-ft occuring at 4400 RPM
Drive information:
Boat has 2 x Bravo One, X, XZ, XR Drives Installed, with 1.5:1 gears
Propeller information:
Propeller: 4 bladed Bravo 1
Prop Diameter: 15.25 in
Prop Pitch: 33 in
Prop is set 24 inches behind, and 6 inches below the running surface
Environmental Conditions:
Boat is to be simulated operating in Salt Water, at 0 ft above msl, with an ambient air temperature of 80 degrees F
Program Completed
Computational Results
Your boat's computed performance is as follows:
SPEED(mph) ENGINE RPM REQ'D BHP AVAILABLE BHP PROP SLIP WETTED LENGTH(ft)
25.00 1909 151 390 38.03 19.25
26.00 1953 157 402 37.02 18.64
27.00 2000 163 414 36.12 18.26
28.00 2048 170 427 35.28 17.91
29.00 2093 176 439 34.41 17.38
30.00 2141 183 453 33.66 17.08
31.00 2187 189 465 32.87 16.60
32.00 2235 196 479 32.20 16.34
33.00 2281 203 492 31.49 15.90
34.00 2330 211 506 30.88 15.67
35.00 2376 218 519 30.24 15.27
36.00 2423 225 532 29.62 14.89
37.00 2472 234 547 29.10 14.71
38.00 2519 242 560 28.53 14.36
39.00 2566 250 574 27.99 14.02
40.00 2616 260 589 27.55 13.87
41.00 2664 269 603 27.05 13.56
42.00 2711 278 617 26.58 13.26
43.00 2758 287 631 26.12 12.98
44.00 2806 296 645 25.69 12.70
45.00 2857 308 660 25.34 12.60
46.00 2905 318 675 24.93 12.34
47.00 2953 328 689 24.55 12.09
48.00 3001 339 704 24.17 11.86
49.00 3049 350 718 23.82 11.63
50.00 3097 361 733 23.47 11.41
51.00 3145 373 747 23.14 11.19
52.00 3197 387 762 22.89 11.13
53.00 3246 399 777 22.58 10.93
54.00 3294 411 791 22.28 10.73
55.00 3343 424 806 22.00 10.55
56.00 3392 437 820 21.72 10.37
57.00 3441 450 834 21.46 10.19
58.00 3490 464 849 21.20 10.02
59.00 3539 478 863 20.96 9.859
60.00 3588 492 877 20.72 9.699
61.00 3637 507 891 20.49 9.544
62.00 3687 522 904 20.27 9.393
63.00 3736 537 918 20.05 9.247
64.00 3789 555 932 19.90 9.227
65.00 3838 571 946 19.70 9.088
66.00 3888 587 959 19.50 8.952
67.00 3938 604 972 19.31 8.821
68.00 3987 621 985 19.13 8.693
69.00 4037 638 997 18.95 8.568
70.00 4087 656 1009 18.78 8.447
71.00 4137 674 1021 18.62 8.328
72.00 4187 693 1033 18.46 8.213
73.00 4237 711 1044 18.30 8.101
74.00 4287 731 1055 18.15 7.992
75.00 4338 750 1066 18.01 7.885
76.00 4388 770 1076 17.86 7.781
77.00 4438 791 1086 17.73 7.680
78.00 4489 811 1096 17.59 7.581
79.00 4539 833 1105 17.46 7.485
80.00 4589 854 1114 17.34 7.390
81.00 4640 876 1122 17.22 7.298
82.00 4691 899 1130 17.10 7.208
83.00 4741 922 1138 16.98 7.120
84.00 4792 945 1144 16.87 7.035
85.00 4843 969 1151 16.76 6.951
86.00 4893 993 1157 16.66 6.868
87.00 4944 1018 1162 16.56 6.788
88.00 4998 1046 1167 16.49 6.802
89.00 5049 1072 1171 16.39 6.724
90.00 5100 1098 1174 16.29 6.648
91.00 5151 1125 1177 16.20 6.573
92.00 5202 1152 1179 16.11 6.499
93.00 5253 1179 1180 16.02 6.428
93.05 5256 1180 1180 15.94 6.357
Click here to return to Simulate! page
Thank You for using www.SpeedboatPerformance.com!!
We appreciate your business and hope we can meet your needs again soon
Stop by www.speedboatperformance.com, and you can run the program with your exact setup and see for yourself!
Manufacturer: Fountain
Model: 32
Length: 32 ft
Beam: 8 ft 4 in
Weight: 8800 lb
Deadrise Angle: 22.5 deg
Hull Depth: 6 ft
Number of Running Strakes: 4
Number of Transverse Ventilated Steps: 1
Hull has a keelpad
Boat has an open cockpit
Engine information:
Boat has 2 x 502 c.i. Normal engines installed
Engine Redline: 5300 RPM
Peak BHP is 620 BHP occuring at 5300 RPM
Peak Torque is 700 lb-ft occuring at 4400 RPM
Drive information:
Boat has 2 x Bravo One, X, XZ, XR Drives Installed, with 1.5:1 gears
Propeller information:
Propeller: 4 bladed Bravo 1
Prop Diameter: 15.25 in
Prop Pitch: 33 in
Prop is set 24 inches behind, and 6 inches below the running surface
Environmental Conditions:
Boat is to be simulated operating in Salt Water, at 0 ft above msl, with an ambient air temperature of 80 degrees F
Program Completed
Computational Results
Your boat's computed performance is as follows:
SPEED(mph) ENGINE RPM REQ'D BHP AVAILABLE BHP PROP SLIP WETTED LENGTH(ft)
25.00 1909 151 390 38.03 19.25
26.00 1953 157 402 37.02 18.64
27.00 2000 163 414 36.12 18.26
28.00 2048 170 427 35.28 17.91
29.00 2093 176 439 34.41 17.38
30.00 2141 183 453 33.66 17.08
31.00 2187 189 465 32.87 16.60
32.00 2235 196 479 32.20 16.34
33.00 2281 203 492 31.49 15.90
34.00 2330 211 506 30.88 15.67
35.00 2376 218 519 30.24 15.27
36.00 2423 225 532 29.62 14.89
37.00 2472 234 547 29.10 14.71
38.00 2519 242 560 28.53 14.36
39.00 2566 250 574 27.99 14.02
40.00 2616 260 589 27.55 13.87
41.00 2664 269 603 27.05 13.56
42.00 2711 278 617 26.58 13.26
43.00 2758 287 631 26.12 12.98
44.00 2806 296 645 25.69 12.70
45.00 2857 308 660 25.34 12.60
46.00 2905 318 675 24.93 12.34
47.00 2953 328 689 24.55 12.09
48.00 3001 339 704 24.17 11.86
49.00 3049 350 718 23.82 11.63
50.00 3097 361 733 23.47 11.41
51.00 3145 373 747 23.14 11.19
52.00 3197 387 762 22.89 11.13
53.00 3246 399 777 22.58 10.93
54.00 3294 411 791 22.28 10.73
55.00 3343 424 806 22.00 10.55
56.00 3392 437 820 21.72 10.37
57.00 3441 450 834 21.46 10.19
58.00 3490 464 849 21.20 10.02
59.00 3539 478 863 20.96 9.859
60.00 3588 492 877 20.72 9.699
61.00 3637 507 891 20.49 9.544
62.00 3687 522 904 20.27 9.393
63.00 3736 537 918 20.05 9.247
64.00 3789 555 932 19.90 9.227
65.00 3838 571 946 19.70 9.088
66.00 3888 587 959 19.50 8.952
67.00 3938 604 972 19.31 8.821
68.00 3987 621 985 19.13 8.693
69.00 4037 638 997 18.95 8.568
70.00 4087 656 1009 18.78 8.447
71.00 4137 674 1021 18.62 8.328
72.00 4187 693 1033 18.46 8.213
73.00 4237 711 1044 18.30 8.101
74.00 4287 731 1055 18.15 7.992
75.00 4338 750 1066 18.01 7.885
76.00 4388 770 1076 17.86 7.781
77.00 4438 791 1086 17.73 7.680
78.00 4489 811 1096 17.59 7.581
79.00 4539 833 1105 17.46 7.485
80.00 4589 854 1114 17.34 7.390
81.00 4640 876 1122 17.22 7.298
82.00 4691 899 1130 17.10 7.208
83.00 4741 922 1138 16.98 7.120
84.00 4792 945 1144 16.87 7.035
85.00 4843 969 1151 16.76 6.951
86.00 4893 993 1157 16.66 6.868
87.00 4944 1018 1162 16.56 6.788
88.00 4998 1046 1167 16.49 6.802
89.00 5049 1072 1171 16.39 6.724
90.00 5100 1098 1174 16.29 6.648
91.00 5151 1125 1177 16.20 6.573
92.00 5202 1152 1179 16.11 6.499
93.00 5253 1179 1180 16.02 6.428
93.05 5256 1180 1180 15.94 6.357
Click here to return to Simulate! page
Thank You for using www.SpeedboatPerformance.com!!
We appreciate your business and hope we can meet your needs again soon
05-24-2005, 10:29 AM
#3
Offshoreonly Advertiser
Offshoreonly Advertiser
Re: prop selection
Pleasure speaking with you. I look forward to hearing more info once you test.
__________________
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
Brett Anderson / BBLADES Professional Propellers
920-295-4435 http://www.bblades.com/
[email protected]
