I don't know....DJ...you keep out this....you and your black thing...but when I bought the blue coupe....stock, it would keep up with the "black" roadster...now with the same mods and "no tune" it will take the roadster out of the hole...not every car is the same...mods or no mods...this little blue coupe may be faster, but only the track times will tell....so, your friend just may have a pretty fast stock srt to begin with...but, once the code 3 pulley was put on, and installed correctly...which means proper gap set when you installed it...you should notice the difference in the lower end...for sure...I take it, you did a throttle reset, and gave the car some time to adjust?.....just my take on it...