Quote:
Originally Posted by Vegas69
I had a feeling it leaned out more with the cleaner on to make the power. Lucky it didn't work out the opposite and not test it until you installed it in the car.
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I remember watching a Harley on a mobile dyno many years ago up at the local Harley plant during a show. They ran the bike with no air cleaner, then put a K&N setup on it and it made considerably more power with the filter on.
That was the first time I really started to understand airflow and power. Was kind of surprised to see this much change with my air cleaner on, but we backed it up with another pull and it was plain as day different.
You are right, I'm glad we tested it. Just imagine if we had leaned out the secondaries to max power with it off, then ran it with it on...
