i don't know it just seems like it is not a real smooth transition when, for instance, in my case i drive down a hill every morning on the way to work, if i am not real conscious about what i am doing, when i let off the throttle it kinda "jerks". same when i am throttling up from a stop. if i shut the air down, its pretty smooth. this car has always been somewhat jerky with the throttle though. it improved 100% when i put a drop-in k&n in it, but still not perfect. i was just curious if anybody else experienced this. i'll tell you what it reminds me of, i had a 69 Z-8 back in 81-84 ( no dissing on my age ha ha ha ) i restored and you had to use kid gloves with that thing, extremely touchy pedal. ahhhhh but what a monster for torque! laugh