Originally Posted by
Fast355
Someone is also well over 300 RWHP now with his L31/4L80E/9.5" 14-bolt driveline. This person also gained 40 ft/lbs of torque at 1000 rpm at the wheels by adjusting the timing map in that area using a locked 3rd gear pull on a dyno. Talk about a throttle response boost. Someone drifted his Express around a 90* right hand corner afterwords without intending to.
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