No two engines will be identical but somewhere
15-21 is very light throttle and very mpg friendly
between 10-15 Hg/in is good econo driving
closer to 10 is a little more fuelish indicating
maybe a better timing could be adjusted in.
under ten is pushing it a bit. Normal accell
is 0-10.
(I drive by a vac gauge all the time and use it as my
main check on normal engine performance.
check out
http://www.centuryperformance.com/vacuum.htm
for a good description of using a vacuum gauge
to diagnose engine condition.
Paul Tegler wizardz@toad.net http://www.teglerizer.com
-----Original Message-----
From Glen Byrns <grbyrns at ucdavis.edu>
To: spridgets@autox.team.net <spridgets@autox.team.net>
Date: Friday, February 02, 2001 5:37 PM
Subject: manifold pressure
>Is anyone out there running a vacuum gauge on their spridget? I'm curious
>what the reading is when cruising along at a steady throttle setting in 4th
>or 5th gear (though I suppose it doesn't really matter what gear, only that
>there be no acceleration or deceleration).
>
>
>Thanks,
>Glen Byrns
>'59 bugeye
>'59 Morris Traveller (Winifred)
|