Quote:
Originally Posted by dremd
I think we can all agree that the SGII will not be capable measuring for this test. THE SGII works off of reported Engine Load which is based on airflow; if the K&N flow was the benefit then the throttle plate would close more, ending up with the same airflow and same reading.
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I think this the whole point that everyone has made about "worthless unless WOT". If you let off the throttle for the correct speed, you now have the airflow (air blockage) you need to correctly drive the car. Doesn't matter where in the intake it is, that is what you want. At WOT, you hope to have even more airflow than before, hopefully enlarging a BSFC island. If you aren't in a suddenly found new island, you didn't get any benefit.
On the other hand, has anybody seen real gains from reducing exaust backpressure? There aren't any hard requirements to reduce airflow after combustion (some pressure helps keep it even), so I would expect any MPG gains to be made here.