yes i did notice a difference. i did a hp run yesterday and here are the results
236 hp and 331 lb/ft of torque.
lost some hp but gained in the torque department.
hypertech sent me an email back today too. they said that their chip is made for a stock car and one with the oem e prom too. also they dont custom burn chips anymore either. well my car already had a prom update done by the dealer. so i basiclly asked them where they want me to put this chip i have
i have contacted superchip to and lets see if they can custom burn me a chip.
if not, next is a DIS4 , then i can set my own timing curve and dont have to worry about knock retard.