Evo 9 retune for ARC airbox
Another track car and another retune. This time the owner added a ARC airbox.
Putting it on the dyno and doing a baseline pull showed bolting on the ARC airbox provided no gains from when he was tuned with the stock OEM airbox with drop-in filter.
After retuning was a different story.
+13whp / +4wtq peak
Large gains in area under the curve from 5500 rpm on, perfect for a track car that usually only sees 5000 rpm + on the track.
Two pulls back to back with final tune to show consistancy:
Mods:
2006 Evo 9
TBE
Hi-flow cat (300cell ceramic)
Stock injectors
Walboro Fuel Pump
GST boost assembly using ECU-controlled boost
ARC airbox
LICP
91 octane
GST Custom dyno tune (oem ecu flash)
