Need some prop help
08-16-2017 | 12:22 PM
#12
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Joined: Aug 2017
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From: Tucson AZ/ Sitka AK
Well he said 5300 rpm at 73mph not 70 and 26 pitch. And even if the case 19 isn't 20 lol. Either way there is room to improve the setup. He is complaining about the hull but there is a lot room to improve on the prop.
Would hydromotives work better on those hulls then bravos? I know fountains were faster with them
Would hydromotives work better on those hulls then bravos? I know fountains were faster with them
08-16-2017 | 12:45 PM
#13
VP of the tickfaw200
Joined: Jul 2007
Posts: 2,124
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From: baton rouge, louisiana
just got a new pair 30s to run. haven't opened it all the way up but been around 80 with more to go and at 3600 was running 60 no hop or tab. have 720+ a side but very deep with TRS.
08-16-2017 | 06:24 PM
#16
Charter Member # 55
Joined: Oct 2000
Posts: 20,241
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From: Omaha/LOTO
Well he said 5300 rpm at 73mph not 70 and 26 pitch. And even if the case 19 isn't 20 lol. Either way there is room to improve the setup. He is complaining about the hull but there is a lot room to improve on the prop.
Would hydromotives work better on those hulls then bravos? I know fountains were faster with them
Would hydromotives work better on those hulls then bravos? I know fountains were faster with them
Bravo 1 props stamped pitch is rated 1/2" to 1" more than actual pitch. Rev limiter on a 525EFI is at 5350 rpms.
Fountains like hydromotives(Q4's) because they have stepped hull that doesn't need bow lift.
Rev limiter on a 525EFI is at 5350 rpms.
I was wondering where I should start with prop testing? The boats a 1989 31 bullet (knotched transom) with stock Merc 525 EFI's. right now the drives are stock brovos but I'm just not seeing good speed at all out of it I haven't found a good prop. So far the boat has done 73 with a set of 5 blades (can't remember pitch but I think they were 28's). Currently it has 4 blade 26's but it hits the rev limiter immediately and will run 70. I was wondering what other people with similar hp have seen speed wise and what drives they have? I'm thinking I am going to need XR's with 2" shortys but want to see what other bullets have before pulling the trigger.
Thanks
Thanks
Last edited by Griff; 08-16-2017 at 07:04 PM.
08-16-2017 | 06:52 PM
#17
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From: Tucson AZ/ Sitka AK
Actually only early fountains had q4s and some early ones where straight bottoms. It wasn't until mercury bailed out Reggie that he had to switch to all mercury parts and they had to raise the x to use the bravos and were typically slower
08-16-2017 | 07:50 PM
#18
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Thanks for all the help! The boat does need more bow lift it rides pretty flat in my opinion. I would also like to know if hydromotices would work. I am searching for 4 blade 28's to run but I came across a set of 4 blade 29 hydromotices anyone know if those would work?
