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sammyg2 sammyg2 is offline
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Join Date: Aug 2000
Location: a wretched hive of scum and villainy
Posts: 54,992
On a CIS engine, completely removing the air filter cover will not increase the power. Neither will a K&N.
According to BA, removing the cover AND the filter will net a couple of HP but running with no filter would not make your engine happy.

On any engine, you need to find the bottleneck and work on making it flow more. the filter on a CIS 911 is not a bottleneck. It will flow air just fine, the air flow sensor and to a lesser extent the throttle body are the bottlenecks on the intake.
Old 10-14-2005, 12:28 PM
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