Auto Meter Gauges

[Mr-s413bt]

Ok ppl.

I am just interested to get other ppls feed back in regards to Auto meter gauges and their accuracy.

I have had a few over the years but the last 2 have been useless.

Gauge 1:Sport Comp Boost Gauge= 1-2psi high and same on vac side

Gauge 2:Pro Comp Liquid Filled Boost Gauge=1-1.5psi low and same on vac side

Now how do i know that they are wrong?? I have a Wolf 3D and a Blitz ID 2 boost controller and they both read EXACTLY the same.

My set up is boost gauge and boost controller running off the same vac port on the side of the inlet manifold on a S4.

Any one else had similar trouble?? Or can help work out why they are so far out??

p.s the pro comp liquid filled is BRAND NEW

Glenn