Hi all again,
I've just about finished my first tune up on a car with points.
Replaced points, condenser, plugs, and polished all connectors I could
find. Lubed dizzy moving parts. Cleaned the K&N air filters and
re-oiled them. Will replace plug wires this weekend and re-time the
engine.
I have a few questions, though, as you may have guessed.
1) My car has been converted to SU carbs (1 3/4 inch I think, not the 2
inch) and the idle is now very low since replacing all these things (500
rpm when warm). It was low before, 600-700, but now it dives down to
~300-400 any time I stop before recovering back to 500 rpm. Where do I
adjust the idle on these to get it back to 800 rpm where it should be?
There are three screws, one on each of the carbs attached to the linkage
directly and a single one on an arm off the linkage and touching a cam
type thing. I assume I turn the two nearest the carbs themselves. What
is the other for?
2) All my references are for ZS carbs and say the dash pots should have
enough fluid in them "to offer resistence when the threaded part is 1/4
inch from the top of the dash pot". In my carbs (filled with ATF I'm
guessing from the pink colour) I get resistence when the threads are
over an inch from the top of the dash pot. Is this correct for SU
carbs? Should I take some of the fluid back out? Is there anything
wrong with having too much fluid in there, I know having no fluid is
bad.
3) Plugs no 4, 5, and 6 were black (but not oily) when I removed them.
1, 2, and 3 were a nice tan colour as they should be. Where is the
mixture adjustment on SU carbs? What do I measure to know the mixture
is correct?
4) Can anyone guess the identity and /or origin of these carbs? The
dash pot dampers have a brass hex head on them so someone at our local
club said they are probably off of a TR4. They are NOT 2 inch SUs as
another club member has them, and they are huge compared to mine. I'd
like to identify mine so I can get more info on them in case I need to
do further adjustments or I need to order parts.
Thanks again
Rob Christopher
Ottawa, ON
74.5 TR6 CF27218UO
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Rob Christopher | | | | robc@cisco.com
Hardware Engineer | .|||. .|||. | (613) 271-3585
Cisco Systems | ..:|||||||:...:|||||||:.. |
Kanata, Ontario |---------------------------| http://www.cisco.com
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