Need 550i Performance Enhancements
Coming from a fully loaded 545i (non-sport pkg), which ran the 1/4 mile in 13.7 secs, to a 335i (sport pkg), with a JB4 G5 tune, ran the 1/4 mile in 12.8, I would like the 550i to run the 1/4 mile in the high 12s. I would prefer not to go to a supercharger to accomplish this.
Has anyone flashed the ECU and/or changed the camshafts to get more power out of this V8? I would like to get an additional 80 HP out of this motor, without spending $10k for an ESS supercharger.