MAP calculations?

[chetwagner at uswest.net]

I have a MAP volts to vacume calculation that I use all the time for 
setting things like spark and BLM cells by map.  Add 20 ton the raw 
decimal number and then divide that by 3.17.  I use this with the 
7747 and also with the 7730 with 8D code.

On 6 Oct 2000, at 23:38, Reid Bishop wrote:

> I'll ask this question once again, having not heard an answer before.
> 
> When reading the MAP voltage output on a 7747 ALDL datastream, how does one
> convert it to actual MAP pressure?  The only source I have says this:
> 
> 	MAP kpa = MAP(AD)/2.706 + 10.3
> 
> Is this correct?
> 
> Here at 6300 feet, my 4.3 idles at about 37kpa, with the IAC running 38-42.
> I still am showing 110 BLM's at idle, and I am having trouble getting it
> leaned down some more.  I'm just wondering if I am adjusting the correct VE
> cell.
> 
> 
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