AT THE DYNO
One of the local speed shops, Speedtek, had a Dyno Day special. Three pulls for $35.
For those who haven't been to the dyno, it's quite simple. They drive your car onto the dyno where the rear wheels are on rollers. They strap it down by the axles, front and rear. The dyno operators connect a sensor to the electrics on one cylinder to measure RPM. If the dyno includes the wideband O2 readings, they stick a sensor up your tailpipe to read how rich or lean the exhaust is. They drive your car at high gear, start the recording and floor the gas pedal. Dyno measurements are taken at WOT. They let off at or around redline and stop the recording. When done, they unstrap your car and drive it off the dyno. That simple.
I got 238 rwhp and 286 torque with the K&N Filter, Mac Prochamber and the first cut of the RWTD tune. The a/f ratio was steady at 14:1. I still don't know why there was such a variance in the readings. I emailed Speedtek and never got an answer. I thought dyno runs would show maybe 2-3 rwhp differences but my dyno run showed up to 11 rwhp variance. WTF Speedtek?
(Did any of this help? Leave some comments in the guest book. Let me know you were here.)
