Subject: [Fot] Triumph GT6 Differential - LS versus welded

From: Scott Janzen via Fot <[email-masked]>
Date: Fri, 21 Jun 2024 11:25:55 -0400

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You might recall I posed a question about this a year+ ago.  Jason came =
down strongly in favor of welded, others had different opinions.
I ended up buying a Gripper limited slip unit out of england and put it =
in (clutch type).  I=E2=80=99m very pleased with the unit - I told them =
how I use the car, approx HP, tires, and they basically set it up for =
maximum pressure.  I can push the car around the paddock more easily, =
but I=E2=80=99m getting no inside wheel spin in corners, no matter what =
corner or speed, so that seems good.

Lap Times - the real test.  I ran last year with the welded unit at both =
Summit Point and Lime Rock.
My best time at Summit was a 1:30.8 in 2023, at Lime Rock it was a =
1:07.2
Last year the engine was freshly rebuilt over =E2=80=9922-=E2=80=9923 =
winter.  Tires were new Speedsters for Summit Point, slightly less new =
by the time I got to Lime Rock.

This year my best time at Summit was a 1:30.3, Lime Rock 1:07.9.
Engine is the same, probably somewhat tired after six race weekends =
(I=E2=80=99m actually pulling it now to change rod bearings).
Tires (speedsters) were fresh for Summit again this year.

Conclusion?  The driving style is definitely different, and I feel like =
I can place the car more precisely with the LS. I think it helps me a =
bit with speed in the Carousel at Summit.  However, there appears to be =
no big difference in lap times.  If I=E2=80=99d been consistently faster =
at both tracks I=E2=80=99d make more of a case for it, but that was not =
the clear outcome.  However, the lack of a fresh engine this year is =
probably good for something.  It will get a full rebuild or an alternate =
new engine for next year and the east coast Kastner cup, so we=E2=80=99ll =
see what that data shows.

The jury is still out, but right now, I=E2=80=99m not making a strong =
case for spending $1,100 for  the LS.  It=E2=80=99s fine, but not =
apparently inherently superior by much of a margin.  I like turning the =
car into the turns, rather than throwing it in to get the rear sliding =
like I did with the welded unit, but I can adapt either way.=20

I do like the Gripper, it has seamless engagement, seems to be excellent =
quality, no wheel spin like I hear from Quaiffe users.  BTW, I did have =
to get out the air grinder and do some minor clearancing on the diff =
housing.  It=E2=80=99s a tight fit, and there was minor interference =
with bolt heads and the circumference of the diff.

More than you wanted to know!!!

Scott=

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">You =
might recall I posed a question about this a year+ ago. &nbsp;Jason came =
down strongly in favor of welded, others had different opinions.<div =
class=3D"">I ended up buying a Gripper limited slip unit out of england =
and put it in (clutch type). &nbsp;I=E2=80=99m very pleased with the =
unit - I told them how I use the car, approx HP, tires, and they =
basically set it up for maximum pressure. &nbsp;I can push the car =
around the paddock more easily, but I=E2=80=99m getting no inside wheel =
spin in corners, no matter what corner or speed, so that seems =
good.</div><div class=3D""><br class=3D""></div><div class=3D"">Lap =
Times - the real test. &nbsp;I ran last year with the welded unit at =
both Summit Point and Lime Rock.</div><div class=3D"">My best time at =
Summit was a 1:30.8 in 2023, at Lime Rock it was a 1:07.2</div><div =
class=3D"">Last year the engine was freshly rebuilt over =E2=80=9922-=E2=80=
=9923 winter. &nbsp;Tires were new Speedsters for Summit Point, slightly =
less new by the time I got to Lime Rock.</div><div class=3D""><br =
class=3D""></div><div class=3D"">This year my best time at Summit was a =
1:30.3, Lime Rock 1:07.9.</div><div class=3D"">Engine is the same, =
probably somewhat tired after six race weekends (I=E2=80=99m actually =
pulling it now to change rod bearings).</div><div class=3D"">Tires =
(speedsters) were fresh for Summit again this year.</div><div =
class=3D""><br class=3D""></div><div class=3D"">Conclusion? &nbsp;The =
driving style is definitely different, and I feel like I can place the =
car more precisely with the LS. I think it helps me a bit with speed in =
the Carousel at Summit. &nbsp;However, there appears to be no big =
difference in lap times. &nbsp;If I=E2=80=99d been consistently faster =
at both tracks I=E2=80=99d make more of a case for it, but that was not =
the clear outcome. &nbsp;However, the lack of a fresh engine this year =
is probably good for something. &nbsp;It will get a full rebuild or an =
alternate new engine for next year and the east coast Kastner cup, so =
we=E2=80=99ll see what that data shows.</div><div class=3D""><br =
class=3D""></div><div class=3D"">The jury is still out, but right now, =
I=E2=80=99m not making a strong case for spending $1,100 for &nbsp;the =
LS. &nbsp;It=E2=80=99s fine, but not apparently inherently superior by =
much of a margin. &nbsp;I like turning the car into the turns, rather =
than throwing it in to get the rear sliding like I did with the welded =
unit, but I can adapt either way.&nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D"">I do like the Gripper, it has seamless =
engagement, seems to be excellent quality, no wheel spin like I hear =
from Quaiffe users. &nbsp;BTW, I did have to get out the air grinder and =
do some minor clearancing on the diff housing. &nbsp;It=E2=80=99s a =
tight fit, and there was minor interference with bolt heads and the =
circumference of the diff.</div><div class=3D""><br class=3D""></div><div =
class=3D"">More than you wanted to know!!!</div><div class=3D""><br =
class=3D""></div><div class=3D"">Scott</div></body></html>=

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