The first thing I did when I got my AVY was run the Hypertech PPIII on it. I love it.
When I installed the K&N FIPK (junk), I noticed that when I was going for gold, the engine would cough at 6000rpm just prior to shifting. It did not do this before the FIPK.
I hated the cabin resonance while driving the truck with the K&N, so I removed the K&N and installed the UDP (I love it), this fixed the cabin resonance, but did not fix the coughing at 6000rpm.
I presume the coughing I see at 6000rpm is too much air for the amount of fuel.
Today I performed the Throttle Voltage mod, (went to 4.68 volts), although I did not experience any 'seat of my pants' improvement, the coughing at 6000rpm has gone away!
I guess I am now getting enough fuel for all the air the new intakes allow through.
I hope my observation is helpful to some of you...
When I installed the K&N FIPK (junk), I noticed that when I was going for gold, the engine would cough at 6000rpm just prior to shifting. It did not do this before the FIPK.
I hated the cabin resonance while driving the truck with the K&N, so I removed the K&N and installed the UDP (I love it), this fixed the cabin resonance, but did not fix the coughing at 6000rpm.
I presume the coughing I see at 6000rpm is too much air for the amount of fuel.
Today I performed the Throttle Voltage mod, (went to 4.68 volts), although I did not experience any 'seat of my pants' improvement, the coughing at 6000rpm has gone away!
I guess I am now getting enough fuel for all the air the new intakes allow through.
I hope my observation is helpful to some of you...