[insite]

spgribben007:

exhaust / intake will improve your fuel efficiency under normal driving conditions. with a limited budget, i wouldn't do anything at all to these cars since gains are marginal at best.

the most bang for the buck short of a supercharger would be your ECU program, but you only get the most of it if you also do your air intake (muffler really not necessary on this car) and headers, all of which equals the price of the supercharger (almost).

as for the dyno charts, you are graphing torque and HP vs. rpm at the same time. torque is your flatter curve (for our purposes). hp always = 0 at 0RPM, so the HP curve starts very low. the torque curve is showing you, at each rpm, what your torque value is. the HP curve is showing you your HP output at each rpm. horsepower is derived from torqe (HP=torque*RPM/5252).

in the above chart, the dashed lines are torque and the solids are HP.

the colors usually illustrating before / after some type of mod.