Re: some calculations

[Withu Ruksvanichpongs <withu@lox2.loxinfo.co.th>]

	I haven't try it yet ,because I don't know the frontal area of my
car.
	In the article ,they try to tell us  how much more power we
need just to increase top speed a few mph.
	their example is Porsche 944
		Cd 0.33
		frontal area of 20.45 sq ft.
		assume the target speed is 200 mph
	Power needed is 8.7E-06*0.33*20.45*200^ = 469.8 HP.
 Oh,I just see the other one.
	
	new power/old power = (new speed/old speed)^3

	Their Porsche now has 331 rear wheel h.p. and does 175 mph . they
input these info. in  the second formular and use 200 mph as new speed
,the new power is 493 which is very similar to 469.8 from the first
formular.
	I don't think it is very accurate ,because many tuned German sedan
also does 175 mph with about 300 *flywheel h.p.* (all of their h.p. means
rear wheel h.p.,which is much lower than flywheel h.p.)
	Now I'll try the second formular for my car,but I'll use flywheel
h.p. anyway.	old speed=150 old power =230
		new speed=?   new power = 280
		     
    the answer is 160 mph..
			
				they convert Porsche's331 pony in to
flywheel h.p. of 400.!) 469.8 h.p. they need is still a rear wheel h.p.
figure..!!	

					I hope this is detailed enough
					Ben