Offshoreonly.com - Complete repowering of a brick

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Offshoreonly.com (https://www.offshoreonly.com/forums/)

- Do It Yourself, Boating on a Budget (https://www.offshoreonly.com/forums/do-yourself-boating-budget-249/)

- - Complete repowering of a brick (https://www.offshoreonly.com/forums/do-yourself-boating-budget/318849-complete-repowering-brick.html)

apollard

07-28-2015 01:18 PM

Quote:

Originally Posted by AllDodge (Post 4332834)

Agree from what I've heard is the B3 is good up to 50mph, then starts loosing out to the B1. Haven't heard anything in comparisons to the B2, then again they seem to only put them on heavy boats

i run a b3 Up to 63 mph with a very low slip ( around 8%). It is a pretty light boat but the b3 dies abive 50 isn't true.

Budman II

07-28-2015 01:40 PM

Quote:

Originally Posted by AllDodge (Post 4335306)

I do like the turndowns, and while mine are only about 4 inches under water at idle, they do a nice job of making everything quite enough to carry on a normal conversation. When running it is much louder but I think it helps also with the sound being reflected down. I can still talk to the wife as we cruise but do have to raise the voices.

Old guy here also

I think you have to raise your voice a little bit even with thru-prop exhaust at speed - you just get so much mechanical noise from the engine as much as exhaust noise. Is it about as quiet as thru-prop when you are at idle? I'm OK with a little rumble.

AllDodge

08-12-2015 10:55 AM

Maybe last update to this thread:
Unloaded 110 feet of anchor and chain and took it out. Not much improvement, managed to get 48mph at WOT, and cruise speed looked a bit better. Still having at least 20 percent prop slip. Think I'll look around for a set of 4x3's in a 25 pitch to try

Hey it's a brick :rolleyes: just like to reduce the slip if possiable

hullofjustis

08-12-2015 11:12 AM

I have not followed this thread to closely so did you raise the propshaft height (x dimension) on the boat? did you have a bravo 2 on and put a bravo 3 on it. I have been dealing with slippage and drive height issues as well

AllDodge

08-12-2015 11:56 AM

No didn't change height, at least I don't think I did. Had a standard B3 drive, rebuilt the transom and installed an HP transom assy, Bravo XR upper and used my old 2.0 B3 lower. Had 24 pitch props and now running 26

stimleck

08-12-2015 02:41 PM

http://www.offshoreonly.com/forums/g...bravo-iii.html

interesting thread

AllDodge

08-12-2015 04:50 PM

Quote:

Originally Posted by stimleck (Post 4341909)

http://www.offshoreonly.com/forums/g...bravo-iii.html

interesting thread

Very interesting thanks

stimleck

08-12-2015 05:27 PM

Quote:

Originally Posted by AllDodge (Post 4341979)

Very interesting thanks

I had a different situation arise, finally timed and tuned my motor and picked up 3 mph with the 3 blade but my slip rose to 20%, Ill put on the 4 blade this weekend to see if the slip drops. The bottom paint has been removed and the hull painted with interlux VC epoxy bottom paint and the drive is in perfect shape. These last 3 changes had zero effect on speed or slip numbers, only the timing/tune.
Using a bravo 1, I'm curious how a 2 or 3 would change things?

AllDodge

08-12-2015 06:12 PM

Don't see how your getting 20 percent slip with your boat. Its 26 feet and 4800 pounds dry weight. My 23 foot rinker cuddy is also 4800 dry and turns 60 to 62 mph with a 300hp 454 B1. What numbers are you seeing?

stimleck

08-12-2015 07:54 PM

2 Attachment(s)

Quote:

Originally Posted by AllDodge (Post 4342007)

21 pitch 3 blade 1.50 ratio 5000 rpm 53 mph with 4 adults 2 kids 3/4 tank of gas, i have a hard time believing the weight claims from wellcraft,this thing feels like it weighs much more

[ATTACH=CONFIG]544141[/ATTACH]

[ATTACH=CONFIG]544142[/ATTACH]

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