Well, Dr. T, your metric conversion makes sense but I changed the float
heights to .750" and my problem disappeared! I do have to test it again
because when I was having the problem the ambient temp was 95 deg F and
when the problem disappeared it was only 68 outside. Here's a theory based
on a non scientific observation (so I guess it's a WAG) -the GJs appear to
be a larger diameter than stock so maybe hard lefts cause the float to
swing from centrifugal force or just from the carbs being off level. This
opens the larger valve and causes flooding. Happens after idling because
the bowls are fullest plus the combination of rear squat and sharper turn
than at speed. I can't visual which way the float would go on a left to
support this though. Maybe a good tool would be a see through bowl with a
carb cam connected to a laptop on the front seat. Anyway .750 seems to
work for me without any adverse effects so thanks for the advice once
again.
Russ
71 TR6
----- Original Message -----
From: Sally or Dick Taylor <tr6taylor@webtv.net>
To: <6pack@autox.team.net>
Cc: <hlub34a@aeroinc.net>
Sent: Tuesday, June 13, 2000 3:02 AM
Subject: Float height
> Russ, and others---A few days ago you asked if there was a different
> height for setting the floats after installing the Grose Jets, as you
> had symptoms of either flooding or starving when making certain turns. I
> responded that setting the floats at .625 left the fuel level on the
> high side, and try resetting to .750 (as the Haynes manual calls for.)
> I got a response from lister, Valerie, asking about this setting. (I
> think she was just trying to say in a nice way that my numbers may not
> be right.) Well she got me checking again, and here's what turned up:
>
> The Bentley book says to set the float ht. to between .625 and .627
> (16-17mm)
>
> The Triumph Repair Manual gives the identical numbers.
>
> There's only .002 difference between these numbers in inches, yet
> there's .0394 difference between 16 and 17 mm, (in inches.) Seeing this
> error many years ago left me to feel their figures on carbs weren't
> reliable, so....
>
> The Haynes book on the Zenith-Stromberg CD carburetors shows the proper
> setting at between .725 and .787 inches (16 to 17 mm) Now all three
> "bibles" agree that the setting to be between 16 and 17 mm. Obviously
> something has to give here. Some further math shows that 16 mm to be
> .612 inches, with 17mm being .652 inches. It would appear that the .625
> that Russ set his floats at to be correct, and my figures from the
> Haynes manual to be incorrect, so far as the decimal equivalents. For
> those of you who think metric, this would probably never cause
> confusion.
>
> Personally, I stil prefer the lower fuel level setting of .750 (19 mm,
> for those who are used to such equivalents) but now I must admit that
> it's just that. A personal choice, and not something from a manual that
> can be considered completely accurate.
>
> Thanks, Valerie! (I think)
>
> Dick Taylor
>
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