[Fot] LSD diffs, what specs to choose?

[Joe Curry]

Having tried a Phantom Grip (Thanks Steve) I can say that I could not tell
any difference between that and an open diff, even with much stiffer springs
installed.  My conclusion was that any perceived advantage that it has is
just "Phantom"!

Joe

-----Original Message-----
From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
Behalf Of Tony Drews
Sent: Wednesday, August 24, 2011 9:32 PM
To: Alexandre Camoletti; fot at autox.team.net
Subject: Re: [Fot] LSD diffs, what specs to choose?

Phantom Grip has had pretty poor reviews on the forums I participate 
in.  Quaiffe will be long lasting and low to no maintenance.  As long 
as both rear tires are on the ground, I really like it.  However, 
lift the inside rear wheel in cornering and you'll get some spin of that
wheel.

Can't answer any of the Salisbury questions other than Tran-X being 
pretty much the only source that I know of for them.  For RACING, 
with my driving style (not nearly as smooth in the corners as Jack 
was), the Salisbury would be the way to go.  I would expect to wear 
out the clutches occasionally though.  For street use, I wouldn't 
hesitate to use a Quaiffe.  I would expect for the finned cover to be 
unnecessary for street use.  For race use, anything you can do to 
keep them cool is probably a good thing.

Tony Drews

At 06:14 PM 8/24/2011, Alexandre Camoletti wrote:
>Dear FOTers,
>
>Have to install a LSD in my TR3. As the diff needs to be rebuilt, I take
the
>opportunity to install a LSD.
>
>It will be a (very) fast road car, fully prepped for long distance road
>rallies in various conditions  (Winter, Summer, dry, wet, snow).
>
>I would like the car to remain predictable and driveable in all sorts of
>real road situations, so it has to be some compromise I suppose, but I do
>not know the influence of the set up parameters.
>
>I know little about LSDs, hence a couple of questions:
>
>1)      Quaife (gear driven) or Salisbury (disc type)? I know the Quaife
>does not work with one wheel lifted, but has not the problems associated
>with disc type (oil quantity and heat)
>
>2)      If Salisbury type: what ramp angles? I heard of 45/45, 45/60, 30/60
>
>3)      Re Salisbury again: the locking should be lightweight or fully
>interlocking?
>
>4)      Salisbury still: looks like TRAN-X in the UK is the one
>manufacturing them or did any one of you have good experience with another
>Salisbury type LSD manufacturer?
>
>5)      Still Salisbury; should the RACETORATIONS finned cover be fitted to
>increase cooling and oil capacity, or is not critical in a fast road
>application?
>
>6)      There is also the PHANTOM GRIP possibility , what is it and is it
>worthwhile?
>
>Thank you in advance for your feedback!
>
>With kind regards
>
>Alex Camoletti
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