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David David is offline
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Join Date: Apr 2002
Location: Houston (Clearlake), TX
Posts: 8,265
Garage
The spring will determine the lowest boost you can have. The controller lets you set the boost at something above the spring rate. The controller is supposed to eliminate boost creep where the spring alone lets the valve start cracking before full boost is reached.

I still have no opinion on how much better it is since I've only run low boost with my setup before handing the car over to the tuner a couple weeks ago
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2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)
Old 12-23-2006, 01:35 PM
  Pelican Parts Technical Article Directory    Reply With Quote #56 (permalink)