Re: [ST] Higher RPM for racing?

["Mike Young" <myoung@xxxxxxxxxxx>]

Look at it this way: There is "X" amount of power in a pound (litre,
kilo, whatever) of fuel. To make X power you have to mix that given
amount of fuel with the correct amount of air and set fire to it. It
doesn't matter how you do it: Big motor @ low revs (piston aircraft
engine, Diesel tractor), Little motor @ screaming high revs (F1 car, GP
Bike), anything in between.  The trade off is the displacement of the
motor. Take big gulps and you don't have to do it very often. You can
get there with tiny sips too; you just have to do a lot more often.

Drivability is another matter.  The current crop of GP bikes is a
perfect example. They actually soften the power output of the motor to
give the rider the ability to feed the power in earlier in the corners
and get down the straights faster without the lurid power slides that
were so entertaining to watch just a few years ago. I for one really
miss that aspect of top level bike (and for that matter car) racing. 

(Oh, oh, probably seeds for another thread! Or maybe it's been beaten to
death in the past?)

Mike 
06 ST
Seattle

-----Original Message-----
From: st-bounces@xxxxxxxxxxxxxxxxxxxx
[mailto:st-bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Matt Knowles
Sent: Wednesday, August 23, 2006 7:53 AM
To: ST@xxxxxxxxxxxxxx
Subject: Re: [ST] Higher RPM for racing?


On Aug 22, 2006, at 2:54 PM, Joel Ashman wrote:

> It seems to me (a non racer) that given 2 motors with
> the same displacement, one with 12000 RPM and 150 HP (and a peaky 
> curve) and
> a 6000 RPM 150 HP (flat curve) that the lower one would be more usable

> on
> the track.

The major flaw in your argument is that for the same displacement, a 
motor that can spin at twice the RPM can theoretically make twice the 
horsepower. Real world there is less difference but enough that you'd 
never win with a bike that could only spin 6000. Assuming we're talking 
road racing here and not flat tracking.

Matt Knowles - Ferndale, CA - 
http://www.knowlesville.com/matt/motorcycles
  '99 Sprint ST - for going fast and far (2CZUSA)
  '01 KLR650 (A15) - for exploring the North Coast backroads
  '97 KLX300 & '01 Lakota - for playing in the dirt
  '79 KZ400 - just because it was the first vehicle I ever owned

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