This is a multipart message in MIME format.
--===============4365192399847406253==
boundary="----=_NextPart_000_0079_01DBD79E.CE6546F0"
Content-Language: en-us
This is a multipart message in MIME format.
------=_NextPart_000_0079_01DBD79E.CE6546F0
charset="us-ascii"
Content-Transfer-Encoding: 7bit
Henry,
Thanks for the info on gearing. Video was helpful as well for having not
ever driven Lime Rock.
Was looking at the Lime Rock HF43 posted race groups. Question. Will we
run in Group 5 as a single group for Friday's practice/qualifying and
Saturday's races as well as the Kastner Cup on Monday? Or, run in multiple
groups, like they have listed below (TR250/6 2500cc in the 2.5 Litre or Over
2 Litre as example)? I assume multiple groups except for Monday's event.
Thanks,
Mark Cook
https://limerock.com/events/historic-festival/hf-driver-information/
HF43 Groups and Classes
The following race groups are our tentative run groups:
Group 1 - Mid Century GT / Sportscars Under 2 Litre
Under 1.3L
Over 1.3L
Group 5 - Triumph Feature - Kastner Cup
Triumph Under 1.6L
Triumph Over 1.6L
Triumph Over 2.2L
Group 6 - Tin Tops / IMSA RS / Under 2.5 Litre Cars
Under 1.3L
Over 1.3L
Group 9 - GT / Sportscars Over 2 Litre / Sports Racing Cars
GT
Sportscars
Sports Racers
-----Original Message-----
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of yellow04 via Fot
Sent: Thursday, June 5, 2025 12:23 PM
To: FOT
Subject: [Fot] Gearing for Lime Rock
If this comes through twice, I apologize. Working through some technical
difficulties with my mail server.
I have been asked by numerous folks about what rear end gear to run at
Lime Rock. Several of our guys with a lot more laps at Lime Rock than I
do have chimed in, thanks everyone for your input. Sometimes a picture
is worth a thousand words, so here's my input.
https://youtu.be/xIg5KQwM-pw
I clipped a lap from my in-car camera from the 2024 Lime Rock Vintage
Festival. My tach is plainly visible and I added captions on what I am
doing with the gearbox. The lap shown is somewhere in the mid-1.05's.
The camera is one of those Go-Pro knockoffs, so the quality is junk, but
it got the job done. The sound was cut, if you heard what the camera
records for sound you would thank me!
The gearing I use in the TR250 is a 4:10 R&P, a Triumph gearbox with
close ratio gears, a stock Laycock overdrive and I am running on Hoosier
Speedsters with a diameter of 24.2 inches. My shift point is 6000. This
example should be easy to reference against your race car assuming you
are familiar with high school math!
This is the same setup I used in my old TR4 racer and the TR3, except my
4-cylinder racers use a Moldex crank, Carillos and a cam that ran to
7000. With the additional revs afforded by the billet bottom end, I
don't need the overdrive to enhance the top end. Again, it's all in the
math.
My line through Big Bend and the Uphill are not optimal, but that is a
conversation for another time.
Watch the tack twitch as I crest the Uphill, you know you did OK when
you get a little wheelspin there!
Hope this helps.
Henry Frye
KCup chair
860.508.3118
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
http://autox.team.net/mailman/options/fot/mecook@mindspring.com
------=_NextPart_000_0079_01DBD79E.CE6546F0
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
<html xmlns:v=3D"urn:schemas-microsoft-com:vml" =
xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml"; =
xmlns=3D"http://www.w3.org/TR/REC-html40";><head>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Dus-ascii">
<meta name=3DGenerator content=3D"Microsoft Word 14 (filtered =
medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoPlainText>Henry,<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>Thanks =
for the info on gearing. Video was helpful as well for having not =
ever driven Lime Rock.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>Was =
looking at the Lime Rock HF43 posted race groups. Question. =
Will we run in Group 5 as a single group for Friday's =
practice/qualifying and Saturday's races as well as the Kastner Cup on =
Monday? Or, run in multiple groups, like they have listed below =
(TR250/6 2500cc in the 2.5 Litre or Over 2 Litre as example)? =
I assume multiple groups except for Monday’s =
event.<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>Thanks,<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>Mark =
Cook<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>https://limerock.com/events/historic-festival/hf-dri=
ver-information/<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>HF43 =
Groups and Classes<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>The =
following race groups are our tentative run groups:<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>Group =
1 – Mid Century GT / <b>Sportscars Under 2 =
Litre</b><o:p></o:p></p><p class=3DMsoPlainText> Under =
1.3L<o:p></o:p></p><p class=3DMsoPlainText> Over =
1.3L<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>Group 5 – Triumph Feature – <b>Kastner =
Cup</b><o:p></o:p></p><p class=3DMsoPlainText> Triumph =
Under 1.6L<o:p></o:p></p><p class=3DMsoPlainText> =
Triumph Over 1.6L<o:p></o:p></p><p =
class=3DMsoPlainText> Triumph Over =
2.2L<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>Group 6 – Tin Tops / IMSA RS / <b>Under 2.5 =
Litre Cars</b><o:p></o:p></p><p class=3DMsoPlainText> =
Under 1.3L<o:p></o:p></p><p class=3DMsoPlainText> Over =
1.3L<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>Group 9 – GT / <b>Sportscars Over 2 Litre</b> =
/ Sports Racing Cars<o:p></o:p></p><p =
class=3DMsoPlainText> GT<o:p></o:p></p><p =
class=3DMsoPlainText> Sportscars<o:p></o:p></p><p =
class=3DMsoPlainText> Sports Racers<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>-----Original Message-----<br>From: Fot =
[mailto:fot-bounces@autox.team.net] On Behalf Of yellow04 via =
Fot<br>Sent: Thursday, June 5, 2025 12:23 PM<br>To: FOT<br>Subject: =
[Fot] Gearing for Lime Rock</p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>If =
this comes through twice, I apologize. Working through some technical =
<o:p></o:p></p><p class=3DMsoPlainText>difficulties with my mail =
server.<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>I have been asked by numerous folks about what rear =
end gear to run at <o:p></o:p></p><p class=3DMsoPlainText>Lime Rock. =
Several of our guys with a lot more laps at Lime Rock than I =
<o:p></o:p></p><p class=3DMsoPlainText>do have chimed in, thanks =
everyone for your input. Sometimes a picture <o:p></o:p></p><p =
class=3DMsoPlainText>is worth a thousand words, so here's my =
input.<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>https://youtu.be/xIg5KQwM-pw<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>I =
clipped a lap from my in-car camera from the 2024 Lime Rock Vintage =
<o:p></o:p></p><p class=3DMsoPlainText>Festival. My tach is plainly =
visible and I added captions on what I am <o:p></o:p></p><p =
class=3DMsoPlainText>doing with the gearbox. The lap shown is somewhere =
in the mid-1.05's. <o:p></o:p></p><p class=3DMsoPlainText>The camera is =
one of those Go-Pro knockoffs, so the quality is junk, but =
<o:p></o:p></p><p class=3DMsoPlainText>it got the job done. The sound =
was cut, if you heard what the camera <o:p></o:p></p><p =
class=3DMsoPlainText>records for sound you would thank =
me!<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>The gearing I use in the TR250 is a 4:10 R&P, a =
Triumph gearbox with <o:p></o:p></p><p class=3DMsoPlainText>close ratio =
gears, a stock Laycock overdrive and I am running on Hoosier =
<o:p></o:p></p><p class=3DMsoPlainText>Speedsters with a diameter of =
24.2 inches. My shift point is 6000. This <o:p></o:p></p><p =
class=3DMsoPlainText>example should be easy to reference against your =
race car assuming you <o:p></o:p></p><p class=3DMsoPlainText>are =
familiar with high school math!<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>This =
is the same setup I used in my old TR4 racer and the TR3, except my =
<o:p></o:p></p><p class=3DMsoPlainText>4-cylinder racers use a Moldex =
crank, Carillos and a cam that ran to <o:p></o:p></p><p =
class=3DMsoPlainText>7000. With the additional revs afforded by the =
billet bottom end, I <o:p></o:p></p><p class=3DMsoPlainText>don't need =
the overdrive to enhance the top end. Again, it's all in the =
<o:p></o:p></p><p class=3DMsoPlainText>math.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>My =
line through Big Bend and the Uphill are not optimal, but that is a =
<o:p></o:p></p><p class=3DMsoPlainText>conversation for another =
time.<o:p></o:p></p><p class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>Watch the tack twitch as I crest the Uphill, you =
know you did OK when <o:p></o:p></p><p class=3DMsoPlainText>you get a =
little wheelspin there!<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>Hope =
this helps.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p class=3DMsoPlainText>Henry =
Frye<o:p></o:p></p><p class=3DMsoPlainText>KCup chair<o:p></o:p></p><p =
class=3DMsoPlainText>860.508.3118<o:p></o:p></p><p =
class=3DMsoPlainText>_______________________________________________<o:p>=
</o:p></p><p class=3DMsoPlainText>fot@autox.team.net<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>http://www.fot-racing.com<o:p></o:p></p><p =
class=3DMsoPlainText><o:p> </o:p></p><p =
class=3DMsoPlainText>Donate: =
class=3DMsoPlainText>Archive: http://autox.team.net/archive =
http://www.team.net/pipermail/fot<o:p></o:p></p><p =
class=3DMsoPlainText>Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/mecook@mindspring.com<o:p></o:p=
></p><p class=3DMsoPlainText><o:p> </o:p></p></div></body></html>
------=_NextPart_000_0079_01DBD79E.CE6546F0--
--===============4365192399847406253==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
--===============4365192399847406253==--
|