Who's got a mapdaddy? - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-02-2007, 11:41 PM   #21
Ben
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Roger Ennis found this in the hi-res code

Code:
#elif MPXH6400A 
;   barometer        = { table(baroADC, "kpafactor4250.inc")          } 
   barometer           = { (baroADC + 2.147) * 1.6197783 } 
   map                 = { (mapADC + 2.147) * 1.6197783 }
Which confirms that there is no look up table for the MapDaddy sensor, and gives us the formula that the MS uses to translate ADC to MAP.

I'm going to keep my offset value at 4 because it agrees perfectly with my boost/vac gauge, but for the record, MS uses 2.147 for the scale.
Guess my autometer phantom gauge is off by 1.9kPa. I'll live with it.
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Old 11-03-2007, 07:43 AM   #22
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Quote:
Originally Posted by Ben View Post
Roger Ennis
Dude, you are seeing things. Its Roger Enns, not Ennis. :gay:

Jim
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