DynoJets are really twitchy with the inductive pickups. Some trucks have no problem, others get all jittery like you were seeing. Our DynoJet at Edge was the same way. Not much you can do except switch to an optical sensor and run off the crank.
As for the run itself, 275/515 is a little lower than what I'd expect to see, but given the heat and humidity it's not all that bad. However, looking at the run itself (basically, the length of time the run took) I'd venture to say that the engine wasn't loaded enough to make peak boost and that probably cost you some horsepower. You were definitely making fuel but the turbo didn't seem to catch up. When we'd run on DynoJets, we would brake a little bit to give the turbo a chance to spool up and then let off the brake and start the run. This would give is the best numbers. Also, what gear was the run done in? The reason I ask is that the torque numbers seem a bit low for the HP. He should have been in 4th on a 5 speed or 5th on a 6 Speed. This gives a 1:1 ratio through the trans and helps reduce parasitic losses.
BTW - What was the HP on the stock setting?
Thanks.
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