I use to have a C&L 73 a few years back and I had a a very jumpy idle. I then bought a Pro-M 75 calibrated for #24s and a cone filter because I was using a Moroso cold air kit. I had no problems at all with the Pro-m. I just recently upgraded to the C&L 76mm. When I reconnected my battery and started the car, the idle was smooth as ice but once I started driving, the car had no power and was sputtering and jerking as I was driving. I took into account that the computer had to relearn. After about 30 minutes the car was running great but with just a slight bucking at about 2200 to 2300 RPMs. I went home and replaced my moroso cold air kit with my stock air box and the car drives great now. I will be getting it on a dyno soon and I will let you know if there is any improvment.
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Bill Duke
My Coupe
My Mods
12.68@107.6 N/A