37 AT Prop Test Results
04-18-2005, 05:51 AM
#42
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Re: 37 AT Prop Test Results
Damn.James you didn't overload the boat with beads?lol.Sorry to see these at the beginning of the season.Give me a call today if you get time.
04-18-2005, 07:33 AM
#43
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Re: 37 AT Prop Test Results
Ouch James!
BTW - I tried the "Throttle-Up" 30's that you had problems with. My engines run identical with them. Maybe the blade cupping works on my boat and not yours?
BTW - I tried the "Throttle-Up" 30's that you had problems with. My engines run identical with them. Maybe the blade cupping works on my boat and not yours?
__________________
Steve Gresham
'03 Donzi 33ZX
Steve Gresham
'03 Donzi 33ZX
04-19-2005, 06:32 PM
#45
Registered
Re: 37 AT Prop Test Results
I'm just trying to understand these results.
You went 87 @ 5800 with not new 30 Bravo four blades and 84 @ 5300 with 30 Maximus five blades. Then with 1" spacers you went 89 @ 5600 with new 30 Bravo four blades.
So the spacers reduced slip and gave more speed even though there was more gearcase in the water. The five blades without the spacer also reduced slip but decreased speed, even though there was no more gearcase in the water.
Does this mean the five blades had too much blade area for this application?
Help us to understand these mysteries oh mighty Prop Gods!
You went 87 @ 5800 with not new 30 Bravo four blades and 84 @ 5300 with 30 Maximus five blades. Then with 1" spacers you went 89 @ 5600 with new 30 Bravo four blades.
So the spacers reduced slip and gave more speed even though there was more gearcase in the water. The five blades without the spacer also reduced slip but decreased speed, even though there was no more gearcase in the water.
Does this mean the five blades had too much blade area for this application?
Help us to understand these mysteries oh mighty Prop Gods!
04-19-2005, 06:38 PM
#46
Registered
Re: 37 AT Prop Test Results
Originally Posted by excursion
After a long winter project too re-build my HP500's,in the 37 Active Thunder, got some time on them today with 5 different sets of props.
1) 30 stock bravo's,"not new" 5800rpm 87.4mph
2) 31 work bravo's "from Throttle Up" 5500&5800/ 78mph
Something was terrible wrong with on of these props had major slip out of the hole and one ran 400 rpm more than the other.
3) 32 stock bravo's "new" 5550 rpm 86.8 mph
4) 33 labbed Mercury "new" 5600 rpm 87.2mph
5) 30 Mercury 5 Blades "new" 5300rpm 84mph
Over all the Stock 32's were the best, cruise was up by 3 mph and hole shot great.
The 5 blades were 6 mph faster at 3000rpm than the 32's
Going to have my 30's worked into 31's and should be the perfect setup.
Any suggestion's??
1) 30 stock bravo's,"not new" 5800rpm 87.4mph
2) 31 work bravo's "from Throttle Up" 5500&5800/ 78mph
Something was terrible wrong with on of these props had major slip out of the hole and one ran 400 rpm more than the other.
3) 32 stock bravo's "new" 5550 rpm 86.8 mph
4) 33 labbed Mercury "new" 5600 rpm 87.2mph
5) 30 Mercury 5 Blades "new" 5300rpm 84mph
Over all the Stock 32's were the best, cruise was up by 3 mph and hole shot great.
The 5 blades were 6 mph faster at 3000rpm than the 32's
Going to have my 30's worked into 31's and should be the perfect setup.
Any suggestion's??
Nordic Gary
04-19-2005, 09:29 PM
#47
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Thread Starter
Re: 37 AT Prop Test Results
If you would work out some kind of test demo for me I would pay shipping and if they worked and would purchase them. I am a little scared of them, about hurting the drive????
I am good friends with Linster, I think you know him.
Let me know, thanks
James
804-539-3114
I spoke with Julie at Thottle Up(great help
) and she was the one that suggested the drive spacer, after running with the spacer the 30 bravos, my slip went from 24% to 14%. I am going to be running my old 30's this weekend to find out what they do.
Will keep updated.
I am good friends with Linster, I think you know him.
Let me know, thanks
James
804-539-3114
I spoke with Julie at Thottle Up(great help
) and she was the one that suggested the drive spacer, after running with the spacer the 30 bravos, my slip went from 24% to 14%. I am going to be running my old 30's this weekend to find out what they do.Will keep updated.
Last edited by excursion; 04-19-2005 at 09:32 PM.
04-22-2005, 05:57 AM
#48
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Re: 37 AT Prop Test Results
James did you get my email about the lower gear case.the gears are already out of it.Here are some pics of the truck in the paint booth before its cleared today without the lightning.
04-22-2005, 06:03 AM
#49
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Thread Starter
Re: 37 AT Prop Test Results
Yea, I got the email, a little more than I wanted to spend, I have a complete third bravo as backup.
That truck is going to look great pulling the AT. Cant wait to see it.
That truck is going to look great pulling the AT. Cant wait to see it.
04-22-2005, 06:31 AM
#50
Registered
Re: 37 AT Prop Test Results
Damn James, that sucks. Are you going to put new lowers on or get those fixed?
I just read an email from one of our members. Hit something running across Broad Bay and took out his outdrive.
I just read an email from one of our members. Hit something running across Broad Bay and took out his outdrive.
