Hello,
So what you are saying is that the vacuum 'timing tinkering' is designed
to reduce the effect of the mechanical advance under heavy load to avoid
pinging?
My understanding was that it was to increase the advance in order to
provide more power when the load increase...
Or maybe it depends unpon the amount of mechanical advance provided by
the distributor...
One thing is sure, is that you always want to maximize the advance (just
bellow knock zone), so if your mechanical advance is 'sloopy', you will
want to use a vacuum advance to increase the advance under load to
maximize power
If your mechanical advance is too aggressive, then you will want to
decrease the advance under load to minimize pinging...
I guess what I need to see is a "normal" advance curve (let us say at
every 500rpm) and compare it with what my car is doing...
Does anyone have advance curves data around?
Thanks, cyrille
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