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Hmmm... we're talking about a rate of change. The greater the rate of change, the greater the horsepower.
So, let's say that the frictional losses are equal at a steady state rpm, no matter what the horsepower. Now change the rpm. Let's say from 1000 to 5000. The higher hp engine generates a faster rate of change than the lower hp engine. But both encounter the same amount of friction ... only over different periods of time, the high hp engine doing it's work to overcome the friction over a much shorter period of time. I've a feeling that it's the shorter period of time that would show up as an increase in frictional losses. Just a guess. |
Petek,
Whoa,,,,that might be it! Frictionall losses WOULD be higher when the "time" was decreased to achieve a set rpm. The "faster" you spin it up, the more it will "resist". Gear weight inertia, friction of the "teeth" losses, gear oil, all kinds of things would come into play with "time" factored in. Rule of thumb: 1 pound of rotational weight is worth 3 pounds of static weight. Lighten your tire wheel combination by one pound will have the same effect as lighten the body weight by 3 pounds! Ernie |
I give up **) spinning masses, frictional losses, redmist, you name it - I just wanna mash the gas and haul ass :p
Randy |
Use a chassis dyno as a tunning aid. Many people pick up 30-40 hp just by tunning their car on the dyno.
Again, the higher the hp, the less the losses. There was an article in one of the hot rod type mags. that had an engine that made 850 fwhp and only lost 10% at the rear wheels. |
Georgiasnake,,,,,right on dude! lol
Ernie |
Hi yes there are many variables 20-30 percent is average. But sometimes as hp increases so does loss due to inertia losses witch includes anything in the driveline. To back this claim if you ask anybody that runs an engine dyno they program rate of accel common rates are 150 rpm and 300rpm
per second the faster rate I've seen show as much as 20 flywheel hp less. Hope this helps. |
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