Converting Stock Ignition Map

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bluetrepidation
Experienced Squirter
Posts: 197
Joined: Sun Nov 13, 2005 8:24 pm
Location: Youngstown Ohio

Converting Stock Ignition Map

Post by bluetrepidation »

Ok so what is what here? To me the 13 inHg column would be the "idle" portion of the map and 1 inHg would be more toward ambient air pressure. But when you convert 13 inHg to kPa you get 44kPa? Am I missing something? Is it because this is inHg vacuum?

Image

A.J.
1999 Saturn SC2 1.9L DOHC 4 cyl NA
MS II Blue Processor w/ 2.684 Beta Code
V3 PCB
MegaTune 2.25
Innovate LC1 WB O2 Sensor
OBD I Saturn Wasted Spark DIS
w/ Cooling Fan and IAC
czb83
MegaSquirt Newbie
Posts: 2
Joined: Tue Nov 15, 2005 11:50 am

Post by czb83 »

Yes, the vacuum is the inverse of the map reading in kpa. So 0 inHg vacuum would be atmospheric pressure wherever you. I believe you would just subtact the inHg converted to kap from atmospheric to get what the map would read.
bluetrepidation
Experienced Squirter
Posts: 197
Joined: Sun Nov 13, 2005 8:24 pm
Location: Youngstown Ohio

Post by bluetrepidation »

Alright thanks.
1999 Saturn SC2 1.9L DOHC 4 cyl NA
MS II Blue Processor w/ 2.684 Beta Code
V3 PCB
MegaTune 2.25
Innovate LC1 WB O2 Sensor
OBD I Saturn Wasted Spark DIS
w/ Cooling Fan and IAC
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