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Friday night I installed the Cobb intake. I've been running a closed end K&N filter since I got the car. Cylinder corrections were always between -1 and +4. For poops and giggles I decided to put the open end supplied filter in when I installed the tube. It seemed to increase the range of cylinder corrections. Around 60 miles over two different drives I saw negative corrections of -1.72 and positives of +4.28 without doing any actual pulls. Interesting. So I put the K&N back in yesterday. So far my worst negative correction was -.29 on one cylinder on a full 3rd gear pull. Can anybody make sense of this? I'm thinking possible false knock from from the sound of the open end filter.
Edit: Should be CYLINDER corrections. My bad. Can a mod change the thread title please?
Edit: Should be CYLINDER corrections. My bad. Can a mod change the thread title please?