[lilrobo]

i been tuning my 235 in my 58 biscayne ,, i am real close , i am doing it by vacuum i have almost 20 on the gauge , i have the idle close to what i think and timing also , by the highest vacuum , but i still have a little popping in exhaust , just a little ,, whats the best way to adjust the carb , i have been screwing it in until it starts to mis and back it out a little ???

any input would be grateful
thanks

[cdminter59]

Use your vacuum guage to adjust the carburetor too. Turn the screws out until you get the highest vacuum reading. What's wrong with a timing light, you don't own one?. Here is an article on setting the timing on a HEI. http://www.crankshaftcoalition.com/w...EI_distributor

[lilrobo]

Dont think i have a dizzy like that ? do i
Thanks

[Hotrodrobert]

You cannot just set the idle timing with a vacuum gauge or you will end up with too much timing.
That engine sets by looking in a hole in front of the flywheel on the passenger side of the engine. There is a pointer and a ball on the flywheel. Adjust with the vacuum advance disconnected.
If you want to change the timing, you must mark the flywheel or the balancer and make a reference pointer or just use a light with adjustable flash.
That engine will break with too much timing and does not like detonation.

[lilrobo]

i have a timing light , i will try to use it ,, i have been told to do timing with vacuum ,, i need to check my valves also

thanks for the heads up