I've been around BB for awhile but this time I'm stumped. I put a K&N Xtreme filter air cleaner cover and most times it runs like the
motor is missing or running out of gas when I
go over 2500 RPM or so. I take the filter off
& it runs great. Mind you it doesn't happen all the time. I thought the choke on my Holley was sticking and then I thought it could be the ignition coil. It hasn't happened yet w/ the stock air cleaner lid &
I'm still thinking an ignition problem.
Any body out there had a similar experience?

Doe sthe K&N have a drop base holder? If so there may be some mechanical interference from that guy. but this would have to be all the time, but intermitant.

Perhaps is is a bad plug wire up on the distributor, and the K&N air cleaner contacts it in some way. --ok, maybe not. http://www.chevelles.com/forum/smile.gif

I can't see the cleaner swap causing this problem. http://www.chevelles.com/forum/confused.gif

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-Just call me Otis
71' 3880# with me. Big Block 402, Merlin oval heads, 10.2:1CR, TH400, 3.73 posi,
1/8th: 8.0 @ 88mph
BEST 60': 1.85 w/street tires.
BEST 1/4: 12.5 with 1.89 sixty foot (street tires)
BEST MPH: 109mph

Picture of me roasting the tires and other guy stuff (http://www.auburnextremeracing.com/drivers/mike/)
Video of me staging (smoke of course) (http://www.auburn.edu/~ledfojw/vids/mike_chevelle_burnout.avi)

Hay Rain Man, what kind of carb? If it runs fine with out the air cleaner off and lousy with it on, I know where I would look.

Will

Is that Extreme lid interfering with the carb bowl vents?

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Leo Paugh
Maryland Chevelle Club #017
A.C.E.S.#3731
progress has little to do with speed, but lots to do with direction.
Maryland Chevelle Club (http://www.chevelles.net/mcc/mcc.htm)