The factory air box flows well, and if you havent tuned for a CAI and used a bigger MAF then you will not see a gain in power. The exhaust will benefit the low end torque and your running the same program as your initial dyno run
There are also always differences between dyno's. i picked up 10HP/15TQ from my dyno at HPP. It was also not 103* like my first session and the DA was better yesterday.
Had a guy with a GT500 that dyno'd at gearheads 2 weeks ago with full TVS setup and did 575/575, yesterday he did 640/640 which is where it should be
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 Current:
2012 F150 FX2 Screw 3.5L Ecoboost
AFE Stage 2 CAI, AFE Atlas 4" catback, SSI93T4 Tune
mods to be put on:
MAK 3" Offroad downpipe, FR Intercooler, Meth kit, SSI T5 Tune
Totaled:
2013 GT/CS A6
Steeda CAI/ VMP Tune/GT500 AB/JEGS CAT DELETES/
STEEDA UCA/LCA'S/ EIBACH PRO KIT STRUTS/ FRPP K SPRINGS/ BMR PANHARD BAR / Shelby Razors 20's
Last edited by PLASMAN; 10-07-2012 at 01:16 PM.
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