All right, it kills me to say this but...I doubt that our cars make 340hp.
10-02-2004, 09:38 AM
#32
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i was replying to jdblueaudis4 because i knew he dynoed at awe. you can't divide chp by whp, that
gives you percentage of whp. you need to divide hp lost by chp to get correct %. in my example at awe the car lost 55 hp through wheels which is 22% of 250(if you wanted to use 260chp, it would be 25%, 65/260=.25 or 25% and if you tried you way of 260/195=1.33, that shows a 33% increase from whp which is backassward of the way you want to figure it, you are losing hp from the crank, not gaining it from the wheels)
10-02-2004, 09:50 AM
#33
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also remember the dyno has internal correction factors
plus SAE correction factors it uses that are based on weather variable and internal variables setup by the rolling road.
10-02-2004, 09:54 AM
#34
Whatever hp our car makes, it makes it over a much larger rpm range than an M3.
That's what allows it to be competitive with an M3 on a race track. At the drag strip, a small powerband (like the M3's) is not much of a hinderance as a reasonably skilled driver can keep it on the boil pretty easily. On a racetrack however, inevitably there are corners which place you "between gears" and a large flexible powerband is a big advantage in those corners.
10-02-2004, 05:53 PM
#36
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Participated in a RMC BMW CCA DS last weekend...
There were three E46 M3's in my run group. The track's front straight consists of a 1/4 mile drag strip plus the staging and slow down areas. At some point during the day, I entered the straight behind each of the M3s and each time, the gap was essentially constant (except when I passed..). Note that I have about 2k miles on my S4.
