[Diy_efi] MAP vacuum signal isolation?
pparaska at comcast.net
pparaska
Tue Jan 24 06:35:29 UTC 2006
I'm running a Megasquirt-I with a Holley Pro-Jection 4bbl TBI.
I've been grabbng the vacuum signal off of a line from a full
time vacuum source on the front bottom of the TBI (below the
throttle plates. I share that source with a vacuum advance can
on the HEI distributor, through a T in the hose coming from the
port on the TBI that splits off to the MegaSquirt's MAP sensor
and also to the HEI vacuum advance can.
Is there a problem with this kind of setup? Could I be
getting strange signals to the MAP sensor while the
vacuum advance can is changing it's volume (diaphram
moving)?
In general, is it better to feed the MAP a signal straight
from a manifold plenum that is removed in distance from
the power brake booster and other vacuum ports (Vac
advance, etc.)?
TIA,
Pete
http://AlteredZ.com
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