[apk919]

And now some results...

First, it was not a good day for data logging... it was gusty enough to cause a lot of noise in the data. Second, I tried two different locations for the air flow sensor, as mentioned above. The first location was identical to the pre-fettle sensor location. I actually got slightly lower flow, but that was anticipated because of the changed calibration matrix. The second location was chosen to give the same flow during the static calibration post-fettle as the first location gave pre-fettle. That gave higher flows. But once both locations were corrected by the calibration factors, the results were close to identical (as they should be).

Basically the amount of fettling so far has increased flow over stock by about 20%. I'm not particularly happy with today's data though... so more investigation is in order. On the other hand, 10 minutes with a dremel tool and you get at least 20% more air through your intercooler. Not bad, but I'm not done yet. Also, I noticed during the static tests that some air was escaping from under the roof/clam interface and along the clam's rain gutter. More room for improvement.

Note: The vertical axis on the previous graphs were in fpm... those below are in "corrected" cfm (as per discussion above)

Graph 1: pre- and post-fettle data with original sensor location post-fettle
Graph 2: pre- and post-fettle data with alternate sensor location post-fettle