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Old 05-06-2013, 01:02 PM   #11
lacole725
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I might have to go up there. PSU I was hoping to see you there. Only saw a blue SVT, a yellow ST, and a black Mk 3.

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Old 05-06-2013, 01:33 PM   #12
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I know I really wanted to go. My wife ran the 1/2 marathon in Pittsburgh, so we were up there all weekend.
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Old 05-06-2013, 09:50 PM   #13
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take dyno results with a grain of salt. it doesnt matter if its a trailer or set in concrete most dynos are junk. especially mustang dynos -theyre the worst.

we operate a million dollar test cell and guarantee the results. we control the air flow in the room and pressure, the air temp in the room, measure the crank speed using a laser and multiple tire speeds using lasers and the traction drum- this allows us to calculate slip, the dyno is on its own cooling circuit to keep it at 68 degrees to negate any friction in the bearings and electronics. our drums and bearings are so precise that you can use one finger to roll them and stop them.

as for your results it depends on what correction factor they used. temp and pressure can be manipulated to get the numbers you want to see but dont paint an accurate picture. it doesnt matter what the tire pressure is. once the puppy is strapped down the sidewalls always get crushed to ensure good grip. yes a tire with low pressure will eat up some of your numbers requiring more power to overcome the friction
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Old 05-07-2013, 07:55 AM   #14
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Quote:
Originally Posted by rambleon84 View Post
no picture in your first post, but i found it:


Looking at the torque, for a Focus with only I/H/E, I'm willing to bet that the operator did not calibrate this dynometer very well, or at all. The fact that torque is 60 over what it should be, and the run spans only 2k RPM, means that the data here is basically useless.
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Old 05-07-2013, 08:03 AM   #15
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Is it possible to calibrate for only horsepower and not torque? The really emphasized the horsepower number as seen in the big red letters, but didn't mention torque. I did talk to the guy that went after me (Cobalt SS) and his numbers with closer together like one would expect from a gasoline motor, his torque was +/- 5-6 of his horsepower.

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Old 05-07-2013, 09:51 AM   #16
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i hope you did not pay for this dyno session.
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Old 05-07-2013, 10:18 AM   #17
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Your horsepower number is probably relatively close to correct because it is mathematically figured off of what the dyno measures your torque to be. Despite your torque number being incorrect to your car, it still follows a measured acceleration over time. This allows the horsepower calculation to be relatively correct as a max number-even though it isn't remotely correct as to where it actually falls on your power curve.

Ultimately, the run is basically useless to you.
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Old 05-07-2013, 11:05 AM   #18
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$60 for two runs. Figured it's cheaper than most and I just did a bunch of stuff to it over the past two weeks and wanted to know a relative number.

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Old 05-07-2013, 12:32 PM   #19
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$60 for two runs? You should get your money back. On a dyno day, its usually (around here) $75 for three pulls and that usually includes AFR.

This guy running the dyno had a bunch of people there and robbed them.
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Old 05-07-2013, 01:19 PM   #20
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Quote:
Originally Posted by allcarfan View Post
$60 for two runs? You should get your money back. On a dyno day, its usually (around here) $75 for three pulls and that usually includes afr.

This guy running the dyno had a bunch of people there and robbed them.
qft.
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