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Old 10-14-2004, 04:07 AM   #1
Scooby Newbie
Member#: 45417
Join Date: Oct 2003
Talking Got my STI dynoed today

My 2004 STI on a Mustang dyno at Gruppe-S did:

275 hp and 311 ft-lbs on 91 octane!

Mods are:

Accessport stage 2 91 octane
Gruppe-S header, jet hot
Helix catted DP
Forge exhaust
Perrin pulley
GPmoto short ram

I am extremely happy with the numbers, especially considering I still have a cat and no stink, and am on California cheapy 91. Unfortunately my air-fuel ratio was at 11.8:1; I called Cobb and they suggested using the latest Stage 2 base maps, and ditching the short ram. Now I'm going to have to dyno this thing on 93 - because 2 points maked a huge difference in butt-power.
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