730 Pump Shot

[Shannen Durphey]

Vacuum at idle= BARO-MAP at idle.  Thinking in "Hg vacuum can cause
lotsa conversions when working with ecm tables, but it can be done.

(BARO-MAP)*.295= vacuum in inches HG.

I'll send a kpa/voltage chart off list.
Shannen

 

David Tuschhoff wrote:
> 
> > Apples to oranges ... depends on how much vacuum your current setup pulls
> > at idle.  Example - swapping the 218/224 cam into my car caused the vacuum
> > to change to 50-55kpa at idle.  Thus, the vacuum difference between WOT
>                     ^^^^^^^^^^^^^^^^^^^^^
> 
> This is what I am trying to figure out.  Is there a coversion table for the
> MAP?  My scanner shows voltage on the sensor.....so how do I figure the kpa
> at that particular voltage.  Tim, I believe I am using the next step up in
> cams(224/230) from yours, and I see about 2.5volts at idle.  I do notice
> that it does go down while cruising though.
> 
> Later,
> 
> David
>
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