I think I did mention than an LSD or locker is required? With the
eaton G80 locker in my Volvo, I have never slipped the rear tires even
for a second- even when I was backed down with the water over the rear
bumper on algae and sand covered ramps. I do think a locker is at
least as good as regular open diff 4wd on a boat ramp, since there's a
lot more weight on the rear axle than the front due to the tongue
weight and incline. I have pulled a 4,000 lb boat up a ramp with a
Volvo 760 Turbo Diesel that was without a locker- and it was extremely
difficult due to wheelspin, and did slide sideways a bit before I
could get it to start moving forwards. I don't think I'd want to tow
any boat over 2,000lbs again without a locker or 4wd. With a locker
and good tires, the limit is probably torque rather than traction.
I don't know what lockers or LSD options there are for W124s and
W123s. Would the 190E 16v LSD work? I prefer a real locker to an LSD,
but either is better than nothing.
Another thing that helps a lot with a sailboat is an extending trailer
tongue, which will keep your rear tires on cleaner and drier pavement-
as well as protect your car from saltwater damage. I paid a welder
just last weekend to replace my extending tongue, which was rusted
solid.
Sincerely,
Tyler
1987 190D Turbo Biodiesel
On Oct 14, 2009, at 6:24 PM, Curt Raymond wrote:
I think you're right except for one factor you left out:
The sliminess of the ramp.
Which I suppose is less of an issue on the west coast but I saw a
guy damn near lose a fullsize Blazer on a not particularly steep
lake ramp because he didn't bother to put it into 4wd (because it
wasn't steep) but as the weight of boat hit the trailer as he pulled
it out of the water he started to spin and slide backwards. As soon
as he started to slide he hit the brakes but he continued to slide
until the boat started to float...
-Curt
Date: Wed, 14 Oct 2009 14:22:57 -0700
From: tyler <casi...@usermail.com>
Subject: Re: [MBZ] Anyone tow with a W124 wagon?
To: Mercedes Discussion List <mercedes@okiebenz.com>
Message-ID: <4ad64131.2060...@usermail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
<snip>
For pulling up a ramp, I think one could calculate reasonably well the
steepest ramp you could pull a given boat up given (1) the torque of
the
engine at the stall speed of the torque converter, (2) the ratio of
1st
gear times the rear differential, (3) the tire outside diameter, and
(4)
the combined weight of the entire rig. It's #1 that I expect to be
hardest to find...
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