Tom M'Guinn

For those with both in their car, how to the readings compare at any given boost level? My zeitronix always seems to be about 1 psi lower than my vdo gauge(s) -- with same pressure source... Anyone else see this?

Oddjob

Always going to be some +/- error range on gages & instruments.

My zeitronix boost did match my vdo gage quite close, but they were both 1 psi lower than an autometer gage and 1 psi higher than an ashcroft pressure gage that I use for testing. No idea which one(s) are accurate.

Have the same problems w/ tire pressure gages too.

Need to have a gage calibrated by a testing lab to have a better comfort level as to its accuracy.

blown 944

My zetronix and logger both are about 3-4 psi off (lower) due to elevation.