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Guest Message by DevFuse
 

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vac timing advance


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6 replies to this topic

#1 subiemech85

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Posted 21 January 2004 - 11:42 PM

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

#2 GLCraig

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Posted 21 January 2004 - 11:50 PM

The vacuum line should be connecting to a source that is upstream of the throttle plate. i.e. a port on the carburetor.

#3 beauregaardhooligan

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Posted 22 January 2004 - 12:09 AM

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.

#4 Guest_taprackready_*

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Posted 22 January 2004 - 01:47 AM

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

#5 archemitis

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Posted 22 January 2004 - 09:35 AM

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.

#6 Guest_taprackready_*

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Posted 22 January 2004 - 12:50 PM

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

#7 Wasteland

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Posted 22 January 2004 - 03:20 PM

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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