The results are what they are. BBK wanted as close to the same engine temp for both throttle bodies for accurate results. The truck sat all day wednesday while they formed the linkage from the position on the stock throttle body, then they re-installed the stock linkage and made the dyno runs from a dead cold engine (with proper warmup, of course) for the stock baseline numbers. The dyno runs were made back-to-back, never turning the truck off, until the numbers started to fall slightly, then we recorded the best run. After the stock dyno , the BBK throttle body was installed ( about 4:30 PM ) and the truck was left to sit and cool overnight. Then thursday morning ( the temp outside was only a few degrees different than the afternoon before ) with the truck still strapped to the dyno, the same procedure was used as the day before. The truck was warmed up, dynoed with back to back succesive pulls until the numbers started to drop. A total of 6 pulls were recorded with the BBK (no cool down between runs) and the 5th pull was the best. We compare those results with the best numbers from the previous day.
