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Boost Gauge, whats the difference?

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Boost Gauge, whats the difference?

  #1  
Old 07-13-2011, 06:27 PM
1st Gear
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Join Date: May 2011
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Arrow Boost Gauge, whats the difference?

Hi! I am new to the Audi/VW world and to the wonderful world of turbos. I have searched on this forum and I came up dry with answers.

I want to buy a boost gauge for my 07 2.0T A4 but I am stuck at what the difference is between a Mechanical boost gauge and a Electronic Stepper Motor boost gauge is. Can someone please explain the difference? Heres reference links;


Stepper:
Podi - Audi B7 A4 Stepper Motor Boost Gauge Package - BSH Speedshop

Mechanical:
Podi - Audi B7 A4 Mechanical Boost Gauge Package - BSH Speedshop


Now these two are 60 dollars difference in price. Whats the difference? Please dont come in here and just say, you get what you pay for b/c that is not the answer I am looking for. Thanks
 
  #2  
Old 07-13-2011, 08:20 PM
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Join Date: May 2011
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anyone???
 
  #3  
Old 07-15-2011, 07:30 AM
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can a mod move this to a different section with more traffic?
 
  #4  
Old 07-28-2011, 10:26 PM
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A mechanical boost gauge works off vacuum or pressure, the vacuum or pressure is transferred via a vaccum line to a mechanical gauge with a spring inside. The pressure or vacuum pulls and pushed the gauge.

A stepper motor gauge has a sensor that detects the vacuum or pressure and sends it by wire electronically to a gauge (with a stepper motor) which is a fast moving accurate type of motor, commonly used for this application.

Sam
 
  #5  
Old 07-30-2011, 02:11 AM
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I have a mechanical gauge and it does buzz at high boost. I have a anti buzz fitting on as well.

Bskis explanation is pretty good. Most if not all boost gauges have backlighting on them so they will have a pos/neg wires that will need to be tapped, unless you don't mind not having a backlight then just leave them unconnected.
 
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