Fascinating and accurate run down Tony.
Since I sent you a personal congrats a few hours ago Iâ??ve been mentally
reminiscing about when you graciously let me drive the Red Rocket in the RA
enduro years ago.
Remember when I went out for practice and came in after a lap or two and told
you about the banging I heard coming out of corners?
With helmet on and car running you explained I was only hearing the Detroit
Locker engaging, said â??donâ??t worry about itâ?? and sent me back out. I had
never used a DL in anything but a straight line and although I found the noise
a bit disconcerting, I took your advice. Sure didnâ??t want to )and didnâ??t)
break a borrowed car but boy was that fun!
Congratulations again and all the best.
Greg â?? Lunkerâ?? Hilyer
Albuquerque NM
> On Jul 20, 2023, at 10:52 PM, Tony Drews via Fot <fot@autox.team.net> wrote:
>
> Can't keep my mouth shut on this one, lots of great advice so far.
>
> Jack ran welded diff in TR-3 back in the day, he reported push unless he
> kicked the tail out. Taught him bad habits he had to unlearn when he went to
> a formula vee where smoothness rules. When he built his TR-4 he did the
> Quaiffe diff so I have experience with that one.
>
> The three main LSD's are
>
> Gear type (Quaiffe), clutch type (Gripper / Salisbury), detroit locker, I
> guess also viscous coupling but I'm going to ignore that one. This would be
> like a Nissan or Subaru LSD probably.
>
> As mentioned, the gear type diffs reward smooth driving. If you lift an
> inside rear wheel, it WILL spin and you will lose some but not all of your
> drive (open diff you lose all). In Jack's car, I suffered from that but Jack
> didn't after learning to be smooth in the FV. Forced me to pat attention to
> smoothness. Gear type diffs are pretty bullet proof, they rely on some
> creative use of worm drive gears as I understand it. If both wheels are on
> the ground, it will transfer torque to both properly and not spin the inside
> tire. Overheating doesn't appear an issue. There are very smooth in
> engagement - can't feel it.
>
> Clutch type have many adjustment options if you choose to use them. They
> require some care in what lubrication you use since they are using clutches
> in an oil bath. The clutches can wear over time so there is some maintenance
> needed. They can also produce heat when being actively used, that can be an
> issue in longer events. They can keep an inside wheel from spinning when off
> the ground. They are progressive in takeup.
>
> Detroit Locker is not generally available in the TR diffs, they are rare in
> the big TR's, not sure if they are even available in GT-6 / spit. They act
> like an open diff on corner entry so no push but act like a welded diff on
> power on exit of turns. They are mechanical, reliable and not sensitive to
> which lube you're using. This is the one that fits MY driving style. You
> can feel them engage at times - I don't notice while racing but do notice it
> in the rain or when pussy footing around. Would be horrible on the street
> I'd think.
>
> Cheers, Tony Drews
>
>> On 7/20/2023 10:44 AM, Scott Janzen via Fot wrote:
>> Does anyone have experience with a Gripper diff - or a Quaiffe? I currently
>> run a welded diff in the GT6 and am contemplating whether any advantage
>> could be gained by making a swap. Certainly curious as to what the super
>> fast GT6s at the Kastner Cup were running.
>>
>> Scott Janzen
>> '68 GT6
>>
>>
>>
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