When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You can see where a shift puts you at the next gear by drawing a vertical line in the following chart:
Notice in the next chart, which assumes 8900 RPM shifts, that the acceleration is still relatively better above the hp peak than it would be if you upshifted. (Might be a little hard for some to distinguish)
Originally posted by s2knikko ifi get more power to the wheels when i shift at 8300... if you are holding to 9k rpm then you are running for 700 rpm without building horsepower... shift as soon as you are in your peak hp range (8300) and you will be right back to making hp... make since guys?
NO.
First, If what you are saying was true, then you would not continue to accelerate, and we know that is not true.
Second, when you shift you are NOT making power. The earlier you shift the earlier you are lower on the power band for 2nd gear making LESS POWER. And the car you're racing has since caught up to you inbetween shifts. Ever notice how you pull on a car when he shifts? If you shift when he shifts, you have no advantage. And since you are now lower on the power band after the shift, since you shifted early, he should pull on you.
AND THE MOST IMPORTANT RATIONAL FOR WHY THIS IS WRONG!!!! The next time you get a chance to look over a dnyo chart, notice that you ARE MAKING HORSEPOWER AT 8900 (REDLINE) RPMS!. In fact you are making more hp then you are at 6k. So would you rather have the decrease from 205 whp to 170 hp at 8900 or "get back to making" 115 at 6000?
EDIT:
dumb man's (me) math/logic
for your argument we will imply horse power translates to acceleration.
More HP = more acceleration.
More acceleration which will = speed at a certain point on a track all other things being = ( speed = acceleration x time)
If you accelerate faster, then you will be faster at a given point.
HP does not = speed
HP does = power (Power is directly related to acceleration)
A decrease in HP does not = a decrease in speed.
A decrease in hp does = a decrease in power.
More power = more acceleration
170 whp@ 8900>115 whp@ 6000
early shift = less acceleration
less acceleration = less speed at a given point on the track
Conclusion, don't shift early
That was fun. I work with five year olds. One thing I've learned over the past four years is that you can't rationalize with them. They just don't understand where you're coming from. This post reminded me of work. This guy is the only one who doesn't get it. You just kept trying. Oh well, it is time to give up.
06-29-2003, 04:58 AM
