Corey,
The unisyn is adjustable so that the float is in the middle. Screw the dome
shaped part in or out to get the correct air flow. I suspect that it is too
open to work at the low RPM. Assuming that all of the carb parts are
installed and adjusted properly, check a couple other things:
Make sure that the gaskets between the carb, spacer, and manifold are in
correctly. The gasket with the cut-out section goes next to the carb. I got
mine reversed somehow.
Make sure that you don't have any vacuum leaks. I couldn't find any so I
just replaced all my vacuum lines. In so doing, I found that the fitting on
my intake manifold was loose.
I don't know if a '71 has a charcoal canister and gulp valve, but if it
does, disconnect the hoses from the front of the carbs to the canister. If
there are problems with the gulp valve or canister it will cause you fits.
Good luck
Walt
'74 6
-----Original Message-----
From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net]On
Behalf Of corey.sherman@rcn.com
Sent: Sunday, September 08, 2002 11:11 PM
To: 6pack@autox.team.net; Triumph List
Subject: Advice on Carbs
I just completed rebuilding my carburettors (3365) on my '71 TR6, and
could use some assistance... I can't seem to dial them in. I'm sure than
I'm missing something (like when you've missing your eyeglasses, and
they're on your head).
I read the various books (Bentley, Hanyes, etc) and accessed the many
excellent wonderful knowledge bases (e.g., Buckeye Triumph. VTR, et al.).
I serviced both units, replacing most every gasket and bushing, check
metering needles, cleaned and rebuild to spec...
still encountered a few problems.
I can't seem to balance the Air Fflow between the two carbs.
Engine warm, throttle linkage and choke cables disconnected, 'slow idle'
screw at 1.5 turns (900 rpm) with the cold start/fast idle off. When I
place the Unisyn gauge on the front carb, it stalls. Only when I increase
up to 3,500 rpms does that plastic float move only half way up the tube
(by-the-way, should the float be a round ball or "cup" shaped?).
Manuals/tech notes state that the mixture is too rich...
when I adjust to be leaner, still no improvement...
the float does not want to move!
Is this normal?
Took the car fro a drive...
she runs, but doesn't like to go fast (feels rough), and sputters when I
turn it off.
Any advice would be appreciated.
________________________
Corey Sherman
corey.sherman@rcn.com
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