January 22, 200422 yr where should I connect the advance line, currently connected directly to intake manifold, but is not a constant vac. source. has off the chart, 20+ * of advance at idle, with line connected, 8* disconnected and plugged
January 22, 200422 yr The vacuum line should be connecting to a source that is upstream of the throttle plate. i.e. a port on the carburetor.
January 22, 200422 yr The vacuum advance isn't supposed to have continous vacuum, just when you accelerate. That's why it comes of the carb and not the manifold.
January 22, 200422 yr Originally posted by beauregaardhooligan The vacuum advance isn't supposed to have continous vacuum, just when you accelerate. That's why it comes of the carb and not the manifold. Says who? Experiment and try it either way for a day. Some vehicles like manifold vacuum better, while other work best on ported. Bill
January 22, 200422 yr thats crazy talk. theres a spot on the front of the carburetor, near the bottom, where it bolts to the manifold, on all the cars i have. and the weber has a brass one right in front too.
January 22, 200422 yr Read up on it. Hot rod, Car Craft, various websites. On a modified vehicle it is not always the best choice to use the ported vacuum. There are variables like cam profile, compression, ect... that will determine if ported or full manifold vaccum work best for your particular engine and vehicle use. Do a little research Bill
January 22, 200422 yr I've been hooking the advance line to the manifold for a while and have had 0 problems. infact it seems I get better power over all. deffinetly more power at high rpm's do to the increased advance.
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