Thanks Stan, you have some pretty nice software there, that last graph is really nice.
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David Redszus wrote:Now that everyone is in complete agreement regarding engine performance, gearing and shift points, I'd like to add another function to the equation.
From actual logged data we find that a sprint car on a short dirt oval, uses full throttle only 44% of the time, the other 56% being at some partial throttle position.
A late model, short asphalt track Chevy 350, uses full throttle only 35% of the time, 25% is completely off throttle and the rest is somewhere between.
A histogram of both engine speeds shows only small amounts of time at speeds well above the torque peak and almost no time at the power peak.
Both cars are at the front and are extremely well driven.
So now we have the real world case of engines being driven at the wrong(?) rpm and mostly at partial throttle. So what difference does more horsepower make (except of course in drag racing)?
In both these examples it's a little misleading due to the time the vehicle is under "full power" (not necessarily WOT)
but even then if the driver is up to the task and you give him enough power to spin in ANY section of the track where he can NEVER go WOT then you have given him 100% of the power he needs, never leaving anything on the table. if he's up to the task.
But just as Stan referred to a 27 page thread, I also am going to do the same.
See I'm such a proponent of HP that I even had the guy who started the thread and was posting 27 pages later about how important HP was... well I even had him defending TQ... so my position is pretty firm.
viewtopic.php?t=7809&start=90
Now that thread was pretty well outta control and I didn't post too much in it. I only posted a lot here b/c I was personally insulted and "attacked" by Randy earlier in this thread.
and you will also note where I backed out of the other thread...
viewtopic.php?t=7809&p=72354#72354
as it was going nowhere IMO...
and I have to admit, obviously we don't live in a perfect world.
As Arn said (b/c he's so much better with words..)
Potential
the highest average HP has the greatest Potential... not that it can or will.... although in your example i have to assume these cars are traction limited all but at the end of the straight (as I was given the opportunity to drive a car like this before, where I couldn't use the power it had b/c of traction)
IF some of that mid range could be traded to the top end it will probably make both of your two examples faster....