Tony,
Several people responded the same regarding not having to adjust the carbs for
altitude due to their design. There was one comment regarding a group of
Triumphs traveling up Pikes Peak having fuel starvation issues related to
mechanical fuel pump cavitation. Others in the same group that had electric
fuel pumps had no problems. Iâ??m not sure if I want to go that far or not but
I have a few months to decide. If I decide to install an electric fuel pump
then I have to install an inertia switch too I suppose..I wonder if I can
install the electric pump in series between the tank and mechanical pump as a
backup?
Dave
Sent from my iPhone
> On Dec 3, 2022, at 6:40 AM, Anthony Rhodes <spamiam@comcast.net> wrote:
>
> I strongly suspect that the â??Constant Depressionâ?? design of the SU and
> ZS carbs compensates for altitude a fair amount. So, the mixture is probably
> going to be reasonably good.
>
> What you cannot compensate for is the fact that there is just less air up
> there. You will get fewer HP up at high altitude.
>
> Now, a nice turbocharger (aka Turbosupercharger, which seems like a cooler
> name) would help that. :)
>
> -Tony
>
> Sent from my 1837 Babbage Analytical Engine
>
>> From: Dave Connitt <dconnitt@fuse.net>
>> To: Triumphs <triumphs@autox.team.net>
>> Subject: [TR] Travel and tuning question
>> Message-ID: <F4542DD9-3BA7-4684-8DBB-C189C5AB6717@fuse.net>
>> Content-Type: text/plain; charset=utf-8
>>
>> 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
>
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