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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> ok to use same vacuum line for vacuum advance and tranny vacuum modulator?
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Topic Review (Newest First)
02-19-2003 02:25 PM
slider in wa 72 chevy said it better than i did. Let us know how it turns out.
Slider in Wa
02-19-2003 02:01 PM
72 chevy You need manifold vacuum for the tranny, does the port you have plugged pull vacuum at idle? If so ,use it. Use the port that pulls vacuum when you open the trottle for the advance.
02-19-2003 01:28 PM
brian400ex I have one other vacuum port plugged off on the carb. It is a bigger port than the one i am using. Does it matter. Which one should i use for the tranny?

[ February 19, 2003: Message edited by: brian400ex ]</p>
02-19-2003 01:20 PM
slider in wa No!! That same vaccum being used to advance your timing will be used to shift your tranny. Not good. Tee off fron some where else.
@ penny`s worth.
Slider in Wa.
02-19-2003 10:53 AM
ok to use same vacuum line for vacuum advance and tranny vacuum modulator?

I had to block off the vacuum port on my performer rmp air gap intake because it was in the road of my carb. So would it be ok to just use a vacuum tee and tap into my vacuum advance line?

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