1.36 vs 1.50 Bravo One
1.36 vs 1.50 Bravo One
04-04-2004 | 05:35 PM
#5
Registered
Joined: Mar 2001
Posts: 2,558
Likes: 1
From: ohio
Theres as much argument over this as oil. My old formula sr311 ran faster with the 1.36 drives than the 1.5's. Some newer formulas are faster with higher ratios. It depends on the boat and the power and props etc. I have heard that the 1.36's will handle a bit more power too. Many moons ago, the most efficient prop pitch was around 25". For all I know, that no longer applies with the technology of the last 30 years.
04-05-2004 | 11:50 AM
#8
Charter Member
Joined: Jan 2003
Posts: 1,345
Likes: 0
From: GLOC
I think "Wisdom" is a little strong; maybe dumb luck!
I have used Bravo XR's for several years now, but the only difference I remember between the 1:50 and 1:36 is the ratio. In fact I have changed ratios from 1:50 to 1:36 and back and all it takes is the upper gear sets.
Both are stock and both have many upgraded parts available aftermarket some of which I tried.
As far as I know the only difference is the Ratio!
I have used Bravo XR's for several years now, but the only difference I remember between the 1:50 and 1:36 is the ratio. In fact I have changed ratios from 1:50 to 1:36 and back and all it takes is the upper gear sets.
Both are stock and both have many upgraded parts available aftermarket some of which I tried.
As far as I know the only difference is the Ratio!
Last edited by P Offshore; 04-05-2004 at 11:53 AM.
04-05-2004 | 06:19 PM
#9
Registered
Joined: Jun 2002
Posts: 963
Likes: 0
From: San Diego
I had a 26' cat with 800 hp and a XR drive. Stock ratio on the drive was 1.50, and the boat had a very tough time out of the hole because of a high X dimension. We were running a labbed 32 4 blade prop.
I switched to a 1.36 ration and was able to drop down to a 30" prop, which cured the issues out of the hole. The down side was a loss of mid range power. The 1.36 ratio was a little faster on the top, but not by much.
I would say stick with a 1.50's unless you have big power and start to get into issues with running huge props and or have problems getting on plane.
Our boat was more fun with the 1.50's, but not being able to get on plane because of prop blowout gave me no choice but to change to 1.36's.
I switched to a 1.36 ration and was able to drop down to a 30" prop, which cured the issues out of the hole. The down side was a loss of mid range power. The 1.36 ratio was a little faster on the top, but not by much.
I would say stick with a 1.50's unless you have big power and start to get into issues with running huge props and or have problems getting on plane.
Our boat was more fun with the 1.50's, but not being able to get on plane because of prop blowout gave me no choice but to change to 1.36's.
