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Old 03-06-2013, 06:46 PM   #5
tazswing
Scooby Specialist
 
Member#: 63767
Join Date: Jun 2004
Chapter/Region: NWIC
Location: PDX
Vehicle:
2009 OXT 5-spd
2011 STi hatch

Default

Switching fuels, to do it right, is not super fast. Some people say just run the tank until you get close to stalling but you risk damaging fuel pumps. I have a y-fitting in the engine bay that helps with the change over but then you still need to run the car for a full tank on the new fuel running waste-gate boost.

That is what I do. So, yeah, you can switch fuels but it is not like switching just the map. I am sure someone will say 'non-sense, just hit empty, refill, reflash and go.' But my wallet does not agree with such "convince" of changing fuels.

Have you looked at many 18g type turbo dyno graphs to see how the torque comes on? You might be happy with that on pump fuel and save yourself the trouble of changing fuels.
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