The Defi and Omori units were the most accurate, most responsive and required the least amount of air sampled to register a reading.

However these gauges cost much more than the other 3 brands.

You could buy a Stewart Warner gauge AND my pod for the cost of one Defi or Omori gauge.

 

What was the error range on the other ones?

 

From the notes I took:

In the lab tests the Defi and Omori were accurate.

I had 2 Autometers, one with a carbon dial and another with a silver dial. The carbon dialled one had perfect vacuum reading and off by 1psi on boost, the silver dial one was off 2mmHg on vacuum and perfect on boost.

I had 2 Stewart Warner units and one was accurate on both vacuum and boost and the other I think the needle was misaligned as it was off by +3 throughout the scale. So instead of -21mmHg to 25psi it was -18mmHg to 28psi.

The VDO was off by 2mmHg on vacuum and 2psi on boost.

In the car when I hooked up 2 gauges the dial readings did reflect the findings above. The most noticable pairing was with the Omori and the misaligned Stewart Warner gauge when I was at idle where the needles were at different readings.

 

I have Glow Shift Boost Gauge. It comes with 7 color. If I wanna be racer, just turn the color blur or green. It gives about 25hp

It reads 30psi that's why I got it. I had VDO and it was a great gauge.

 

I have had experience with Defi gauges and they are the best, but for a considerable amount. for only 2psi off Id get teh VDO and assume the error myself.

 

Get a cheap ebay one, they work fine. Spend your money on parts to make your car faster.

 

Defi gauges in audi a4

 

Those look sick man but what about the center vents??

 

I think I will put this one small and compact.

 

almost looks as if you have to squint to see it when your driving, but I have never seen one in person\.