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I only ask because what ive been digging up has led me to believe that the voltage will adjust for pressure. So it almost seems like if the pump is flowing more then the voltage will just be lower to compensate for the added volume.

So is a new tune needed with a new drop in type pump like a GT or Aviator? Or will it self adjust to the change?
 

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No tune needed
 

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Don't need a tune. It will just lower the voltage when the Fuel Rail Pressure Sensor sees enough pressure.
 

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what if you switch from a focus pump to a dual cobra setup? same deal don't need a retune?
 
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