Martin,
A couple of questions......is this a stock motor or has it been rebuilt with
engine mods like shaved head, faster camshaft, combustion chamber profiling,
etc? I think the GT6 Mark 3 has later type ZS carbs with adjustable needles
like the later TR6 ZS carbs - are you turning the needle in the correct
direction to increase richness (turn clockwise to enrichen; counterclockwise
to
lean).
If you've modified your motor for higher performance, there's a good chance
that the stock needles are not capable of providing enough of a fuel charge to
satisfy the increased compression, cam timing, etc. The solution to that
symptom is richer needles.
But, maybe the carb with the problem has a bad/worn needle.....take the
damper piston and needle out and make sure the needle looks okay. Double
check
the diaphragm for proper fit and no hidden cracks. Is the piston moving up
freely without binding? Are you using the correct weight oil in the damper
chambers? There's a lot of narrative on which oil to use in these dampers...I
prefer ATF but whatever you use will be useless if the damper piston doesn't
move freely!
Good luck,
Chip Krout
Delaware Valley Triumphs, Ltd.
Skippack, PA
1976 TR6 CF57822U
In a message dated 3/30/2009 3:50:48 P.M. Eastern Daylight Time,
moira.secrest@verizon.net writes:
And yeah the car runs like a pig up until about 2k rpm because I can't
get the mixture right, the one adjuster is all the way rich.
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