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I've come across a few threads stating that a PMS can not be used to tune when using blow thru Pro-M tube calibrated for 60's. Can someone explain to me why this is?
 

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I guess my question is why does it have to be calibrated for a PMS?
use to be,it had to have a na calibration....but i beleve the series 3 and 4 pms when in stand alone mode aim for a 12.1 afr.with that specific pms calibration,it levels the feild on pms tuning.thus making it easier for rick to help you tune your car.basically makes a starting point...

you can use a supercharged calibration,but it will be really rich,thus requiring more fine tuning.
 
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