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I took the JWT Pop Charger out last week and put the stock airbox back in. If what I posted about the computer compensating for the intake is true, I would probably see a drop in performance at first, then a gradual increase. Keep in mind that so far, this is still a "seat of the pants" test, and I, like everyone else (who isn't deaf) is subject to the placebo effect.
This isn't quite what I noticed though. It seems the stock airbox has a bit more torque when lower than 4000 RPMs, and the JWT has more torque above 4000 RPMs. The stock airbox is smoother. I don't really notice any particular RPMs where there is a lot more power, where-as with the JWT, there were obvious points with more power. With the JWT, there was seemingly more power at ~3000 RPM and ~5000 RPM, with a noticeable jump at 4000 RPM - which is also where the intake system opens up and lets more air in, also drastically increasing the sound of the JWT (placebo effect?)
I did notice though that the power seems to be increasing after the drop I noticed when I first put the stock airbox back in. This could just be me getting used to the difference though. Something to me that indicates some degree of truth to the computer "dialing back" the power increase, is that the JWT seemed much louder the first day or two I had it installed. Once again, this could be just because I got used to it.
I'm still going to do a test (when time permits) of logging the timing advance in addition to other variables, in an attempt to see a difference between the two intakes, caused by the computer adjusting for them. I also have the possibility of doing a 1/4 mile or 1/8 mile drag run with timeslip, so that might show something too.
This isn't quite what I noticed though. It seems the stock airbox has a bit more torque when lower than 4000 RPMs, and the JWT has more torque above 4000 RPMs. The stock airbox is smoother. I don't really notice any particular RPMs where there is a lot more power, where-as with the JWT, there were obvious points with more power. With the JWT, there was seemingly more power at ~3000 RPM and ~5000 RPM, with a noticeable jump at 4000 RPM - which is also where the intake system opens up and lets more air in, also drastically increasing the sound of the JWT (placebo effect?)
I did notice though that the power seems to be increasing after the drop I noticed when I first put the stock airbox back in. This could just be me getting used to the difference though. Something to me that indicates some degree of truth to the computer "dialing back" the power increase, is that the JWT seemed much louder the first day or two I had it installed. Once again, this could be just because I got used to it.
I'm still going to do a test (when time permits) of logging the timing advance in addition to other variables, in an attempt to see a difference between the two intakes, caused by the computer adjusting for them. I also have the possibility of doing a 1/4 mile or 1/8 mile drag run with timeslip, so that might show something too.