Gentlemen;
All good input. Thanks.
That leads me to a related question. My burb has a 78 250 with the integrated head. It has a Delco Remy HEI distributor. There is a vacuum advance on the distributor with a line running to the manifold below the carb. My question is, how do I know if the vacuum advance is working or not? I've seen videos of the "old fashioned" distributors visibly rotating a bit when the vacuum changes. Mine doesn't do anything that I can see. Is there a test to check it out?
I'm curious because when I punch the throttle the vacuum drops instantly to 0 and the engine sputters a bit before catching back up. If I smoothly but quickly push the throttle it drops a little but the engine doesn't sputter. Its on the initial "stomp" that the vacuum goes to 0. Is this normal?
I found a "guide to the vacuum gauge" on line that talked about all the abnormal readings/issues with the gauge. My engine doesn't seem to have any of those issues. The only thing of concern is the depletion of vacuum on hard acceleration.
