Electronic Boost Gauges

[RichB]

I have a question about electronic boost gauge options there are out there. I currently have a Prosport electronic boost gauge and with the car off It reads about -7inHg which tells me that that sender is calibrated to sea level. Are there any electronic gauges out there that show relative pressure instead of absolute pressure based on a sea level pre-set?

Also, would adding a potentiometer to the boost sender line fix the offset I am seeing here at altitude?

[D Walker]

all boost gauges will read "off" here at altittude, no need to correct it. I see this all the time using an AEM or similar MAP based system and comparing vs a boost gauge, it will vary by the amount of atmo pressure at any given time.

[RichB]

I've read that some gauges zero themselves out as part of the opening ceremony. Would those still be off?

What about my potentiometer question? Could that possibly work?

[chickenwafer]

Most electronic boost gauges will self calibrate to atmosphere, these are PSIG (gauge) type gauges, where as PSIA (absolute) are true pressure gauges, except these generally account for atmosphere as well.