Vacuum gauge use/readings question
After reading so many threads about manifold vacumm, reading it with a gauge, I googled it, read up on it.
Now I have a couple questions about interpreting it.
258 stock engine, carter bbd, nuttered, just installed msd6al.
8*btdc, 650 rpm.
Gauge reads at idle 18.5 with barely a bounce of the needle.
Which means the following? Compression is good, no vacuum leaks. Stock cam, valves not sticking, no burned valves, valves seated properly, valve guides good, valve springs are good, valve timing is good, timing is good, no intake leaks, head gasket is good, exhaust is not clogged when slowly revved up as it rises, idle mixture is good,.
My main question is that when I rapidly accelorate the engine, vacuum drops to 1 or possibly 0, and upon deceloration, rises to 23. Is this ok for my elevation or symptom of worn rings or diluted or wrong oil?
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