MAP Q?

[Van Setten, Tim (AZ75)]

> Subject: MAP Q?
> 
> General Motors has a 3 bar MAP.  A gm 3 bar reads to 2 bar of boost.
> MAP,  Manifold Absolute Pressure.
> Bruce
> 
	The 2 bar MAP (1 bar boost, total 15 psi max) used on the Grand
Nationals, GM PN: 16009886, Wells PN: SU-129, Standard PN: AS-4.

	The 3 bar MAP (2 bar boost, total 30 psi max) was used on the 79-80
turbo TA's.  GM PN: 16040749.  GM is the only source I've found for this MAP
and they're real proud of it too!  About $ 100 here in Phx.  Any other
sources, please post it.  
	 
	NOTE:  Both have an orange grommet so it's impossible to tell one
from the other.  The only way I know is to hook it up, and if signal voltage
is 2.25 Volts, it's a 2 bar MAP.  If the signal Voltage is 1.54, it's a 3
bar..Tim.