[TR] Measuring piston position

[wbeech at flash.net]

I think the suggestion of removing the air cleaners, mounting a couple of
web cams with the data married up to the tach and vacume measurements would
be best way to resolve this thread.  


Bill Beecher
'58 TR-3A TS/30766 L (On the road in 2009!)
"A Triumph is man's best friend, it always comes when it is called...of
course, some times it is difficult to make it go"




 

-----Original Message-----
From: triumphs-bounces at autox.team.net
[mailto:triumphs-bounces at autox.team.net] On Behalf Of jimmuller at rcn.com
Sent: Wednesday, December 02, 2009 2:05 PM
To: Triumphs at autox.team.net
Subject: [TR] Measuring piston position

Randall wrote:
> But, throttle position doesn't directly translate to piston position.

Interesting subject, of course.  I hadn't considered whether the lift button
was attached to the piston or separate.  In any case, my curiosity was
prompted by the spring question.

I would think you'd want the piston to operate through its own full range
through most throttle and airflow range.  If I drove a route I know and
recorded the audio as part of a wmv file I should be able to correlate the
piston movement reasonably well to the throttle position under different
load conditions, or at least see where on the needle it spent much of its
time.

Whether it is running lean or rich or in debt or purple is a whole 'nother
question.  If I felt, for whatever reason, that it was too lean at some time
in that drive, I might be able to judge where on the needle it was running
and thus consider a needle thinner at that point.

Of course, it would still be guesswork and lots of data would be just plain
missing.  Mostly it would be interesting to know the actual piston (and
needle) behavior under real conditions.
--
Jim Muller, too busy to do such an experiment now
This list supported in part by the Vintage Triumph Register
http://www.vtr.org


Triumphs at autox.team.net
http://autox.team.net/mailman/listinfo/triumphs


http://www.team.net/archive