triumphs
[Top] [All Lists]

Re: [TR] Overdrive and Sppedometer

To: Jeff Scarbrough <fishplate@gmail.com>
Subject: Re: [TR] Overdrive and Sppedometer
From: Bud Rolofson <levilevi@comcast.net>
Date: Mon, 24 Aug 2020 10:11:52 -0600
Cc: "Triumphs \(triumphs@autox.team.net\)" <triumphs@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <CAO8Q7CPNhZ1reg3jvc=waX1T6tTUkd2tvMwZFHQ4-dngTJNLtg@mail.gmail.com>
--===============3646579565950719417==


--Apple-Mail=_E1189D1A-8979-4C40-883F-4B8BF50FA215
Content-Transfer-Encoding: quoted-printable
        charset=us-ascii

Simple solution? Maybe a higher profile tire and/or 16 inch wheels the =
next time you need tires/wheels. Simple but not cheap.

a larger circumference on the outside edge of the tire, the wheels will =
actually spin slower at any given speed than the stock setup would. =
Therefore, the speedometer in the vehicle will read less than the actual =
speed that is being traveled


> On Aug 24, 2020, at 7:13 AM, Jeff Scarbrough <fishplate@gmail.com> =
wrote:
>=20
> I have a 1975 TR6.   With the original gearbox, the speedometer was =
correct.  I took it out to add overdrive and put in a gearbox from a =
1974 while I worked on it.  That gearbox made the speedo read about 12% =
higher.
>=20
> Got the overdrive on the box and in the car.  My speedo still reads =
high.  I'd like to find a simple solution...
>=20
> Do I try to find the right drive gear for the gearbox output, or do I =
get a different speedometer?
>=20
>=20
> Jeff Scarbrough
> Corrosion Acres, Ga.
> ** triumphs@autox.team.net **
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs  =
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/triumphs/levilevi@comcast.net

Bud Rolofson

Extreme Parts Racing (more than just a haircut)

71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK III (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle=20
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)


--Apple-Mail=_E1189D1A-8979-4C40-883F-4B8BF50FA215
Content-Transfer-Encoding: quoted-printable
        charset=us-ascii

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Simple solution? Maybe a higher profile tire and/or 16 inch =
wheels the next time you need tires/wheels. Simple but not cheap.<div =
class=3D""><br class=3D""></div><div class=3D""><span =
style=3D"font-family: Tahoma, sans-serif; font-size: 18px; =
letter-spacing: 0.18000000715255737px;" class=3D"">a larger =
circumference on the outside edge of the tire, the wheels will actually =
spin slower at any given speed than the stock setup would. Therefore, =
the speedometer in the vehicle will read less than the actual speed that =
is being traveled</span><br class=3D""><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On Aug 24, 2020, at 7:13 AM, =
Jeff Scarbrough &lt;<a href=3D"mailto:fishplate@gmail.com"; =
class=3D"">fishplate@gmail.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D"">I have a 1975 TR6.&nbsp; &nbsp;With the original gearbox, the =
speedometer was correct.&nbsp; I took it out to add overdrive and put in =
a gearbox from a 1974 while I worked on it.&nbsp; That gearbox made the =
speedo read about 12% higher.<div class=3D""><br class=3D""></div><div =
class=3D"">Got the overdrive on the box and in the car.&nbsp; My speedo =
still reads high.&nbsp; I'd like to find a simple solution...</div><div =
class=3D""><br class=3D""></div><div class=3D"">Do I try to find the =
right drive gear for the gearbox output, or do I get a different =
speedometer?</div><div class=3D""><br class=3D""></div><div class=3D""><br=
 class=3D"">Jeff Scarbrough</div><div class=3D"">Corrosion Acres, =
Ga.</div></div>
** <a href=3D"mailto:triumphs@autox.team.net"; =
class=3D"">triumphs@autox.team.net</a> **<br class=3D""><br =
class=3D"">Donate: <a href=3D"http://www.team.net/donate.html"; =
class=3D"">http://www.team.net/donate.html</a><br class=3D"">Archive: <a =
href=3D"http://www.team.net/pipermail/triumphs"; =
class=3D"">http://www.team.net/pipermail/triumphs</a> &nbsp;<a =
href=3D"http://www.team.net/archive"; =
class=3D"">http://www.team.net/archive</a><br class=3D""><br =
class=3D"">Unsubscribe/Manage: <a =
href=3D"http://autox.team.net/mailman/options/triumphs/levilevi@comcast.ne=
t" =
class=3D"">http://autox.team.net/mailman/options/triumphs/levilevi@comcast=
.net</a><br class=3D""></div></blockquote></div><br class=3D""><div =
class=3D"">
Bud Rolofson<br class=3D""><br class=3D"">Extreme Parts =
Racing&nbsp;(more than just a haircut)<br class=3D""><br class=3D"">71TR6 =
CC57365 (Good&nbsp;6)<br class=3D"">71 Spitfire MK IV Race&nbsp;Car =
#3<br class=3D"">69 Spitfire MK III (back&nbsp;up FE engine/dinghy =
car)<br class=3D"">93 Minnie Winnie Race&nbsp;Support Vehicle&nbsp;<br =
class=3D"">77 Z-50A Hardly&nbsp;Davidson Honda Mini-Trail Bike (Triumph =
Pit&nbsp;Bike)

</div>
<br class=3D""></div></div></body></html>=

--Apple-Mail=_E1189D1A-8979-4C40-883F-4B8BF50FA215--

--===============3646579565950719417==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

** triumphs@autox.team.net **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive


--===============3646579565950719417==--

<Prev in Thread] Current Thread [Next in Thread>