CJD
Yoda
Offline
I've got enough time on the car to get a baseline and start fine tuning everything. I have a mixture issue I need to address to the SU Gurus out there.
I set the idle mixture for the best idle speed, plus one flat richer. The carbs are balanced at idle, dashpots filled with 30w oil, and it will purr at an even 750rpm. The engine starts and runs perfectly, except...
Even when it is fully warm, it wants about 1/2" of choke, or it goes flat on acceleration. As long as the choke is out 1/2" it runs great. Even when it has been idling and the temp starts up towards overheating, it simply does not want the choke fully in, or it goes flat on acceleration.
So, my thoughts are to
...unscrew the idle nut and accept a rich idle to smooth the transition. Or
...See if the needle can be raised in the piston for a bit richer transition. Or
...Order new needles, assuming they got changed somewhere along the cars 60 year history.
Am I overlooking anything obvious?
I set the idle mixture for the best idle speed, plus one flat richer. The carbs are balanced at idle, dashpots filled with 30w oil, and it will purr at an even 750rpm. The engine starts and runs perfectly, except...
Even when it is fully warm, it wants about 1/2" of choke, or it goes flat on acceleration. As long as the choke is out 1/2" it runs great. Even when it has been idling and the temp starts up towards overheating, it simply does not want the choke fully in, or it goes flat on acceleration.
So, my thoughts are to
...unscrew the idle nut and accept a rich idle to smooth the transition. Or
...See if the needle can be raised in the piston for a bit richer transition. Or
...Order new needles, assuming they got changed somewhere along the cars 60 year history.
Am I overlooking anything obvious?