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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
I have a couple of questions 1 about the dyno tests nascar has been doing and the other about when a car runs out of fuel and stalls.
Legend
Total Posts: 250
Joined 01/28/2009
the cup guys are nuts they have the dyno rooms set to the standart correction factor, 29.9 (barometer reading) 60 degrees fahrenheit and no humidity. its crazy it cost about a million dollars to have the room set up that way.
Abnormal User
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the cup guys are nuts they have the dyno rooms set to the standart correction factor, 29.9 (barometer reading) 60 degrees fahrenheit and no humidity. its crazy it cost about a million dollars to have the room set up that way.
Yeah, and it'd be even crazier to test engines on a dyno in an environment where temprature, barometric pressure and relative humidity WEREN'T controlled, since those things affect all areas of engine power output..........
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At GKR, we’re here to learn...... R.I.P., Giant.
Abnormal User
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On a carburated engine that runs out of gas, unless you have an electric fuel pump, which NASCAR doesn't allow, you have to crank the engine to get fuel to the bowls. Using ether is a gamble, although the crews do it routinely. Too much of it will often break the top ring lands, break the pistons, or even bend rods. Pumping the throttle on a carburator will cause the accelerator pump to deliver fuel to the intake, resulting in quicker starting, provided you don't overdo it and flood the engine.
Abnormal User
Total Posts: 1410
Joined 06/09/2008
the cup guys are nuts they have the dyno rooms set to the standart correction factor, 29.9 (barometer reading) 60 degrees fahrenheit and no humidity. its crazy it cost about a million dollars to have the room set up that way.
For engine comparisons the conditions have to be controlled so that all engines are tested fairly, otherwise the tests are worthless.
Legend
Total Posts: 250
Joined 01/28/2009
iknow im saying that its just mind blowing all the stuff that goes into building a nascar engine.
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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
Abnormal User
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Joined 06/09/2008
^Yeah, with most of that "stuff" being money! 
Legend
Total Posts: 250
Joined 01/28/2009
would anyone know if they use the standard correction factor or did they switch to the SAE (society of automotive engineers) correction factor. iknow about a year or two ago they still used the standard but idk if they ever did convert to the SAE
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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
Legend
Total Posts: 250
Joined 01/28/2009
i have other questions, do the do an acceleration test or a valveramp test? and do they use a superflow dyno?
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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
Legend
Total Posts: 250
Joined 01/28/2009
i think they use dy engine dynos but not 100 percent sure
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“well I’m faster than a greased cheetah strapped to a bullet train.” - Carl Edwards
