Scott,
Did you know there were 3 versions of carb jet needle profile for the TR4?
I wonder if you installed the last factory profile if that would improve your
running.
The lack of low end torque is probably due to your non-functioning vacuum
advance (which should be a 2-6-3 unit if you have the 25D dizzy). PS; your
advance weights should use the two identical 'light weight' springs.
Carl
'63 TR since '74
---------
I do notice a couple of things (with the Strombergs) . . . the engine will
rev better up to the
higher end . . . pulling all the way up to 5k on the tach.
The SU's seemed to fizzle out up there. However now it seems to feel like
it has weaker grunt (pull) at low RPM.
Also . . . on engine braking, the exhaust has quite a lot more popping and
crackling going on.
Don't know exactly what that means, if it's a bad thing, I suppose I ought
to fix it.
Isn't there some sort of Bypass on TR6 carbs that is supposed to lessen this
effect?
Lastly, when I let off the accelerator (completely) the idle will dip way
down to sub 500 rpm levels.
The red ignition light will start glowing and once or twice the car has even
stalled.
Given a few seconds .. the idle will recover and eventually work its way up
to 1000rpm or so.
One other bit of info: no vacuum advance on this car. Its broken.
So that port is plugged on the carbs.
So those are my symptoms.
Anyone want to hazard some guesses as to what I ought to look at to improve
things?
As I said . .I haven't really put a lot of effort into it yet, so I'm not
stumped or anything, but I'm always open to other's ideas.
Thanks as always.
Scott Tilton
1963 TR4 everyday
Leesburg, VA
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