[Steve C.]

Sort of related....

Out of interest I talked with a tech rep at K&N about the air flow requirements for my 505cid engine and if the small air cleaner assy I was using is adequate. According to their formula a 505 cubic inch engine at 6000 rpm requires about 745 cfm of air flow. Because of hood clearance issues I'm using a 'small' 9-inch diameter K&N filter assy with the K&N X-Stream filter lid. According to him both used together will support about 650 cfm. So he said on the street I'm fine. If I went to the track I'd just remove it. The was with the cut down Victor intake and my custom HP950 carb.

When I changed to the direct port fuel injection I put the car on a Mustang chassis dyno for interest. To the wheels it made 591 hp at 6000 rpm with the filter assy in place.
Removing the filter assy it made 608/609 hp at the same 6000 rpm. The 18 hp difference on the street is a moot point !


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