considering the time between the "baseline" and the header dyno run i had the following problems occur, and did not fix at the time of the run
1) bad plugs/wires
2) exhaust leak
3) CEL (bad O2 sensor)
4) the rear ex manifold (header) was not properly sealed against the gasket/head.
i would say any one of those could have had major effects on the performance of the car at the time of the second run. not to mention what a properly tuned chip could have done. my tuner told me he could have EASILY gotten 190-200fwhp and 170-180lb/ft of fwtq with a custom tune. i would say 20-25 fwhp and 20-30lb/ft of tq is MORE then substantial for 2 mods, that is some serious gains.
