Well like most of us I dont have the $$$ to dyno my car all the time (IE never) but I do run at the dragstrip everytime I mod my car. Here I have the numbers from 2 runs done just two weeks apart at similar temps on the same track. The difference is a simple tune from PCMFORLESS.COM. Thats all. Also note this is at 8000ft density be nice.

Old run : Airfoil, K&N, Siamesed Runners, Ported Plenum, Blaster Coil

Reaction : .338
60 FT : 2.269
660 FT : 10.028
MPH 660 : 72.810
E.T. : 15.619
MPH : 87.688

New run : + Tune

Reaction : .274
60 FT : 2.187
660 FT : 9.799
MPH 660 : 73.196
E.T. : 15.337
MPH : 90.865

Old calculated HP : 230
New calculated HP : 256

So I just want to praise PCMFORLESS for the easiest 26 HP I ever put on my car!

 

great post.
i can't tell you how many parts i bolted on to my old 5.0 mustang back in the day and got to the track only to be disappointed by the results.