800-900 hp for bravo xr's
02-28-2008 | 06:45 PM
#42
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
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From: Elkton, MD
I clicked off 130hr on my BMaxes though!
02-28-2008 | 07:21 PM
#43
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From: cincinnati ohio
NautiByNature,
I too have a 38 Fever with twin 850's and Bravo XZ Drives, billet top caps, bearing and shim upgrades...so far they're holding up well. My boat is a 1998 twin step and if I remember correctly your boat is a 1989 which makes it heavier. I also agree it's better to turn less prop and turn the motors up.
Good Luck with your repower.
Gary
I too have a 38 Fever with twin 850's and Bravo XZ Drives, billet top caps, bearing and shim upgrades...so far they're holding up well. My boat is a 1998 twin step and if I remember correctly your boat is a 1989 which makes it heavier. I also agree it's better to turn less prop and turn the motors up.
Good Luck with your repower.
Gary
03-02-2008 | 11:21 AM
#44
Thread Starter
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Joined: Jan 2006
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From: Brookyn NY
NautiByNature,
I too have a 38 Fever with twin 850's and Bravo XZ Drives, billet top caps, bearing and shim upgrades...so far they're holding up well. My boat is a 1998 twin step and if I remember correctly your boat is a 1989 which makes it heavier. I also agree it's better to turn less prop and turn the motors up.
Good Luck with your repower.
Gary
I too have a 38 Fever with twin 850's and Bravo XZ Drives, billet top caps, bearing and shim upgrades...so far they're holding up well. My boat is a 1998 twin step and if I remember correctly your boat is a 1989 which makes it heavier. I also agree it's better to turn less prop and turn the motors up.
Good Luck with your repower.
Gary
and power combinations the main difference could still be drivers from one boat to the next .
Howard
03-02-2008 | 12:03 PM
#45
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From: Brookyn NY
Our boat had Max Machine Worx Bravo's They (Max Machine) said the drives will hold up to the hp and the weight of the boat.I spoke to them while the boat was being built. I had my first failure at about 18 hours (stripped splines on the clutch shaft)and the second failure(upper gear set,u joint,input shaft(snapped in the coupling),tore the lock nut that sets pinion shaft depth and preload out of the case,tore up the upper case....) was three hours later on the same drive that Max machine repaired. Since Doller Offshore rerigged for me with the Konrads I have had ZERO problems with the drives!! Both Bravo failures happened at 3000 rpm and while running in a 1 foot chop (Barnaget Bay for a sunset cruise).
Sounds like that condition makes the least amount of slip
with the wrong amount of torque at the props to cause breakage . what size props were you using? Do you know the % of slip you were running on them?
thanks
Howard
03-02-2008 | 04:07 PM
#46
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Joined: Mar 2004
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From: Hillsborough,NJ
We were using Hydromotive P5X's 30 pitch. We were still at 18% slip with 1.35:1 ratio. Sonic have a high slip percentage but I'll give up some speed to have a great ride in the rough stuff. We are getting new props this season with out fail so I finally will be able to report on a new correct top speed with the Konrad Aces.
03-03-2008 | 06:51 AM
#47
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From: Brookyn NY
We were using Hydromotive P5X's 30 pitch. We were still at 18% slip with 1.35:1 ratio. Sonic have a high slip percentage but I'll give up some speed to have a great ride in the rough stuff. We are getting new props this season with out fail so I finally will be able to report on a new correct top speed with the Konrad Aces.
03-12-2008 | 04:42 PM
#49
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Joined: Aug 2007
Posts: 1,470
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From: Westport, CT
How much work is involved in switching over from an XR to say a bmax or konrad....I guess the whole gimble assembly have to be replaced with that of a b max or konrad...can it (or will it) create any issues with the placement of the hydraulic steering....just curious how much work it is to move from an XR to something a little bigger. Is it something the pro's can do in a day?
Last edited by Big Time; 03-12-2008 at 04:47 PM.
03-12-2008 | 06:38 PM
#50
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
How much work is involved in switching over from an XR to say a bmax or konrad....I guess the whole gimble assembly have to be replaced with that of a b max or konrad...can it (or will it) create any issues with the placement of the hydraulic steering....just curious how much work it is to move from an XR to something a little bigger. Is it something the pro's can do in a day?
Not sure about Konrad since it involves removing the engine(s) and installilng the extension box or if not using the extension you have to move the engine forward to make room for the trans.
