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How many inches of vacuum does a stock 69 440 Magnum draw?

Started by Daytona R/T SE, July 06, 2007, 12:43:18 PM

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Daytona R/T SE

July 06, 2007, 12:43:18 PM
I'm testing some headlight actuator vacuum pots and need to know how much vacuum to apply to them.   So how much vacuum did a 69 440 Mag draw? Not at the carb, but at the vacuum tree on the manifold.  :shruggy:

idahogrumpy

#1
July 07, 2007, 11:50:22 AM
Depends on elevation,timing, and state of tune. Should be between 15-18 inches at idle.
                                                                                               Grumpy
Too much to say
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GRUMPY
Modified 73 440 Charger, 03 Intrepid SXT, 02 Neon and 2001 Ram 1500 .

Daytona R/T SE

#2
July 07, 2007, 02:53:11 PM
Thanks, Grumpy. That gives me a figure to work with...I don't want to "oversuck" The headlight pots...

blue69

#3
July 09, 2007, 12:45:52 PM
You can test those with a hand operated mityvac. It doesn't take much vacuum to operate them. I think they only needed 3-5" to get them going.

Daytona R/T SE

#4
July 09, 2007, 04:08:17 PM
Quote from: blue69 on July 09, 2007, 12:45:52 PM
You can test those with a hand operated mityvac. It doesn't take much vacuum to operate them. I think they only needed 3-5" to get them going.


Yep, that's what I did, tested them with a hand operated vacuum pump.  I just needed to know how much was "Too much" ;)
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