I am trying to improve the running of the engine in my 74 TR6. The car is
completely stock except for K&N filters and Grosse jets. The car ran good
before I did the work on the carbs and ran OK when I was done. I followed
the Bentley instructions for checking the rich/lean settings of the carbs.
After I freed up the needles, I found that regardless of how far clockwise I
turned them, the car would still stall as soon as I raised the pistions a
slight bit. I finally turned them as rich as they would go, with only a
slight improvement in the running and raising the piston. I have read some
archieves about air leaks in hoses , etc. Is it likely I have air leaks or
is this a normal situation?
I also decided to check the timing. The dwell was 33 deg so I left that
alone. The timing baffles me. The car has a Lucas 22D dist. With the vac
retard line disconnected, the timing was about 18 BTDC, and with it
connected it was still about 6-8 deg BTDC. Should be 4 deg AFTC. But if I
adjusted toward this, it ran really rough. I also read some threads about
other people who seemed to experience this. Is there a good reason for
this? I seem to remember having other cars which did not run properly at
the factory setting.
Thanks.
Jay
74TR6
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