Quote:
Originally Posted by FrickingReallySlow
The edelbrock SC kit includes a 2 bar Bosch TMAP sensor. Even though both the P3Gauge and ECUTEK is reading from ODB2 I'm wondering if one is relative while the other is absolute. Spoke with P3 and they said even though the gauge is digital, vacuum is always displayed in -inHg while positive is in PSI
-20inHg is roughly -9.8psi. So if that's -9.8psi relative to atmospheric then 14.4-9.8 is roughly 4.9psi absolute. Not sure if this is correct assumption but welcome feedback here.
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Turn ignition full on , but engine off, map srnsor or guage should read 14 psi or 1 bar ie atmospheric if absolute or. 0 psi 0 bar if reliative
Also depends if your looking at reliative pressure or absolute
id say your reading reliative on one and absolute on the other