Bravo drives
#1
Bravo drives
Can anybody tell me what the exact differences are between a Bravo Xr and a Bravo XZ drive. I know that XR's have straight cut net forged gears and can handle more HP, but I know nothing about XZ's
I need to to know which one would be better to put behind 750hp blower motors.
I need to to know which one would be better to put behind 750hp blower motors.
__________________
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
Last edited by Smitty; 11-02-2005 at 10:02 AM.
#2
Registered
Join Date: Mar 2004
Location: Nashville, TN
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
Re: Bravo drives
The only difference between a XR and a XZ is the top gear set. They both have the same lower unit shafts and guts.
The top end is straight cut on a XR and helical on a XZ. I have had both and never had any problems out of the top gear sets Just the lower units.
The top end is straight cut on a XR and helical on a XZ. I have had both and never had any problems out of the top gear sets Just the lower units.
#4
Geronimo36
Gold Member
Re: Bravo drives
Originally Posted by BBB725
The XRs do make more noise than the XZs, I ran 700hp thru XZs for two years without a problem
#5
VIP Member
VIP Member
Re: Bravo drives
Here's a breakdown of the differences between them:
http://www.go-fast.com/mercruiser_bravo_sterndrives.htm
I have XR's
Even though I had to put a pinion gear
and a vertical shaft bearing in the starboard
drive, and had to replace the complete upper
on the port, due to a gear failure, that broke the housing.
I don't know if it was due to bad material in
the gears, or the former owners operating habits,
or if it's that they just have a shorter
useful lifespan( the gearsets)???
I bite my tongue and say that XR's are
probably your best bet.
http://www.go-fast.com/mercruiser_bravo_sterndrives.htm
I have XR's
Even though I had to put a pinion gear
and a vertical shaft bearing in the starboard
drive, and had to replace the complete upper
on the port, due to a gear failure, that broke the housing.
I don't know if it was due to bad material in
the gears, or the former owners operating habits,
or if it's that they just have a shorter
useful lifespan( the gearsets)???
I bite my tongue and say that XR's are
probably your best bet.
#6
Re: Bravo drives
Thanks J.T. !!! Good info. It looks like the XR is the better of the two. I am also looking at Imco, Teague etc.
__________________
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
Want your ECU tuned right?? Call Mark at Precision www.pmefi.com
#7
Re: Bravo drives
Originally Posted by Smitty
Thanks J.T. !!! Good info. It looks like the XR is the better of the two. I am also looking at Imco, Teague etc.
#8
Registered
Join Date: Nov 2002
Location: Bonita Springs, Florida
Posts: 3,029
Likes: 0
Received 1 Like
on
1 Post
Re: Bravo drives
At probably a few $$$ extra, you can get a set of custom built drives from TNT. XR uppers, with custom TNT HD cap, Imco gears, shafts and Imco sportmaster lower.
700 hp/770 lbs torque.
700 hp/770 lbs torque.
Last edited by expresscat39; 11-03-2005 at 04:49 PM.
#9
Geronimo36
Gold Member
Re: Bravo drives
Originally Posted by expresscat39
At probably a few $$$ extra, you can get a set of custom built drives from TNT. XR uppers, with custom TNT HD cap, Imco gears, shafts and Imco sportmaster lower.
700 hp/770 lbs torque.
700 hp/770 lbs torque.