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The ambient is on the sheet (I know it is hard to read when reduced for posting). It is 63.11 degrees ambient on the pull. It has been cold over here but we did the install and dyno in a heated shop in Vegas.
why did you keep the boost so low, I thought most people run them closerr to 10psi???
Thats probably the default pulley combo for that motor from magnacharger. At that boost level, you'd keep magnachargers warranty. Keep in mind thats a stock vehicle with a 10.9:1 CR motor running 91 octane. This will be pushing the limits of a stock 4L70E anyway.
Joe, have you done a M112 to R1900 upgrade yet and what differences in powerband are to be expected?
We have not done any back to back comparison on the same vehicle yet. The TVS1900 has alot more when considering what it made at only 5.5 psi of boost with a 3.3 pulley.