Another thing I did over the weekend was some dyno runs
04-25-2005, 07:21 AM
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Another thing I did over the weekend was some dyno runs
The dyno in question is a Mustang 500 at Matrix Integrated in Portland. The "base" numbers were obtained on 91 octane pump gas, while the "test" numbers were obtained using a mixture of 91 and 104 octane that is roughly 94 octane.
<img src="http://pictureposter.audiworld.com/70933/dyno_runs.jpg">
I was quite surprised by the essentially identical shapes of the curves of the 2 different kinds of gas; I hardly expected gains to be so uniform absolute-value-wise throughout the rev range (instead of a uniform percentage increase).
As noted, at the top of 3rd gear (of a Tip car) the dyno registered 89mph. Also note that the much higher torque number at the very low end to the 94 octane curve is probably due to differences in torque-converter lockup.
<img src="http://pictureposter.audiworld.com/70933/dyno_runs.jpg">
I was quite surprised by the essentially identical shapes of the curves of the 2 different kinds of gas; I hardly expected gains to be so uniform absolute-value-wise throughout the rev range (instead of a uniform percentage increase).
As noted, at the top of 3rd gear (of a Tip car) the dyno registered 89mph. Also note that the much higher torque number at the very low end to the 94 octane curve is probably due to differences in torque-converter lockup.
04-25-2005, 08:26 AM
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I expect less driveline loss; a stock 1.8T dynoed there with a 22% loss
So my low-ish number is either due to more loss or the engine making less power than advertised; I think the former is more likely