Subject: Re: [TR] Travel and tuning question

From: DAVID MASSEY <[email-masked]>
Date: Fri, 2 Dec 2022 16:25:42 +0000 (UTC)

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 I drove my TR6 (CD175 Zenith/Strombergs) from St. Louis (alt 600 ft) to Br=
eckenridge (10,000 ft) and then up Pike's Peak (14, 010) and the only issue=
 I had was the car was not too willing to idle at 14,000 ft.=C2=A0 I'm sure=
 it wasn't optimal but it worked well enough for the short trip (VTR).
=20
Dave=20

=20
=20
-----Original Message-----
From: Dave Connitt <[email-masked]>
To: Triumphs <[email-masked]>
Sent: Fri, Dec 2, 2022 9:49 am
Subject: [TR] Travel and tuning question

Hi all,
This coming summer my wife and I are planning a fairly long trip in my TR4A=
=C2=A0 leaving from Cincinnati, Ohio (altitude approximately 500=E2=80=99).=
 Our first destination is going to be Colorado Springs, Co. to drive up Pik=
es Peak (altitude approximately 14,115=E2=80=99). Then north to Mt. Rushmor=
e (altitude approximately 5,700=E2=80=99), then north to drive through Yell=
owstone national park (altitude approximately 9,200=E2=80=99). That=E2=80=
=99s going to be quite a swing in altitude and I am wondering if I will hav=
e to occasionally tune the SU HS-6 carbs? Has anyone on the list done a sim=
ilar drive? If so, how did your Triumph run and what did you have to adjust=
?
Thanks in advance!
Dave Connitt
=E2=80=9867 TR4A-IRS
DavesTR4A.com

Sent from my iPhone
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<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">I drove my TR6 (CD175 Zenith/Strombergs) from St. Lo=
uis (alt 600 ft) to Breckenridge (10,000 ft) and then up Pike's Peak (14, 0=
10) and the only issue I had was the car was not too willing to idle at 14,=
000 ft.&nbsp; I'm sure it wasn't optimal but it worked well enough for the =
short trip (VTR).</font><br>
</div>

<div> <br>
</div>

<div style=3D"clear:both">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div style=3D"color:black;font:12pt Arial, Helvetica, sans-serif;">
<div><font size=3D"4">Dave <br>
</font></div>

<div><span style=3D"font-size:10.0pt;font-family:sans-serif;color:black;"><=
br>
</span></div>
<br>
</div>
</div>
</div>

<div> <br>
</div>

<div> <br>
</div>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
 size=3D"2">-----Original Message-----<br>
From: Dave Connitt &lt;[email-masked]&gt;<br>
To: Triumphs &lt;[email-masked]&gt;<br>
Sent: Fri, Dec 2, 2022 9:49 am<br>
Subject: [TR] Travel and tuning question<br>
<br>

<div dir=3D"ltr">Hi all,<br>
</div>

<div dir=3D"ltr">This coming summer my wife and I are planning a fairly lon=
g trip in my TR4A&nbsp; leaving from Cincinnati, Ohio (altitude approximate=
ly 500=E2=80=99). Our first destination is going to be Colorado Springs, Co=
. to drive up Pikes Peak (altitude approximately 14,115=E2=80=99). Then nor=
th to Mt. Rushmore (altitude approximately 5,700=E2=80=99), then north to d=
rive through Yellowstone national park (altitude approximately 9,200=E2=80=
=99). That=E2=80=99s going to be quite a swing in altitude and I am wonderi=
ng if I will have to occasionally tune the SU HS-6 carbs? Has anyone on the=
 list done a similar drive? If so, how did your Triumph run and what did yo=
u have to adjust?<br>
</div>

<div dir=3D"ltr">Thanks in advance!<br>
</div>

<div dir=3D"ltr">Dave Connitt<br>
</div>

<div dir=3D"ltr">=E2=80=9867 TR4A-IRS<br>
</div>

<div dir=3D"ltr">DavesTR4A.com<br>
</div>

<div dir=3D"ltr"><br>
</div>

<div dir=3D"ltr">Sent from my iPhone<br>
</div>

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From: Randy and Valerie DeRuiter <[email-masked]>
Date: Fri, 2 Dec 2022 16:56:43 +0000

Dave

Sounds like a great trip - I didn’t make the last tour with my other FOG buddies but when they went through the Rockies the #1 issue at altitude was the mechanical fuel pump cavitating due to ethanol gas we think.  A couple guys on the trip hooked up temporary electric pumps and had no issue - no carb adjustments were made for any of them.

Randy
FOG37

Sent from my iPhone

> On Dec 2, 2022, at 10:15 AM, Dave Connitt <[email-masked]> wrote:
> 
> Hi all,
> This coming summer my wife and I are planning a fairly long trip in my TR4A  leaving from Cincinnati, Ohio (altitude approximately 500’). Our first destination is going to be Colorado Springs, Co. to drive up Pikes Peak (altitude approximately 14,115’). Then north to Mt. Rushmore (altitude approximately 5,700’), then north to drive through Yellowstone national park (altitude approximately 9,200’). That’s going to be quite a swing in altitude and I am wondering if I will have to occasionally tune the SU HS-6 carbs? Has anyone on the list done a similar drive? If so, how did your Triumph run and what did you have to adjust?
> Thanks in advance!
> Dave Connitt
> ‘67 TR4A-IRS
> DavesTR4A.com
> 
> Sent from my iPhone
> Donate: http://www.team.net/donate.html
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From: dave northrup <[email-masked]>
Date: Fri, 2 Dec 2022 17:40:03 +0000

What I did vs what I should have done.

We drove from Dallas (sea level) to Reno (about 5000 ft) and did nothing.  The car drove ok.  once in Reno we leaned it out quite a bit and it ran much better.  Back through Taos and return to Dallas did not do anything.  Car still runs and drives but I really should get out there and do a tune up.

Here is how to tell:  hold the piston up just a smidge with a flat bladed screwdriver.

RPM increase means the carb is adjusted too rich.  RPM drop means the carb is adjusted too lean.  RPM stumble, but returning close to normal or no change means the mixture is about right.

-----Original Message-----
From: Triumphs <[email-masked]> On Behalf Of Dave Connitt
Sent: Friday, December 2, 2022 9:50 AM
To: Triumphs <[email-masked]>
Subject: [TR] Travel and tuning question

Hi all,

Sent from my iPhone

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