Did you even read the thread?

 

actually it does.

if redline didn't affect acceleration, then you would never have to take it to 9000rpm much less 4500rpm.


try racing 2 stock S2000's, but you short shift at 7000rpm so the other driver has that "extra 2000rpm that doesn't relate to speed" and see how quickly he walks away from you.

 

Skimmed

 

I guess I could have been more clear. Of course, in that aspect, you are correct. What I mean is, that "extra 2000rpm" by itself does not mean it has an advantage over the other car, as if the 2000rpm "advantage" makes it any faster than the rival car topping out his gear as well.

When talking in terms of the exact same car, of course the guy who shifts at 9000rpm is going to dominate the guy who shifts at 7000rpm.

 

From a track (and autocross) POV -- it matters as well.

Given the same gearing, and same cars -- and you are accelerating thru a short straightaway before braking, sometimes you run into a situation where you either short-shift up a gear, or you're left banging against the redline before you start your braking.

That extra 1000RPMs will help out a lot in situations like that. I've run into that problem a lot at autocrosses where at the finish line, I end up hitting the redline b/c I've simply ran out of RPMs. Imagine if I had 1000RPMs less...I'd be hitting redline at an even earlier time, thereby adding precious tenths to my time.

So yes, 9000RPMs is definatley useful, but 9000RPMs was partially a marketing gimmick as well.

 

actually that rpm range does matter even if racing another car. it's an advantage. as someone pointed out, power is derived from the good old torque and rpm equation.

so a blunt answer to your question is "yes" that extra rpm DOES relate directly to the car's speed/acceleration. no matter what way you slice it, whether you're racing another S2000 or a mustang GT, you need that full rpm range to run your best. so yes, it's an advantage.

 

For a car that was designed to make use of 9000RPMs to derive its horsepower, yes it's an advantage.

But Honda could've designed the car without the extra 1000 RPMs, and still make the requested 240hp, since hp peaks out at ~8300RPMs anyways, right?

So the question next would be, "how big of an advantage is it?" Personally, I think the advantage isn't that great (which can easily be nullified by proper gearing) -- but it is an advantage, definately.

 

Or,let's put it this way;would the 5.7 L.(350c.i.)small block,Chevy,be faster,if it could rev.to 9000 R.P.M.???

 

Higher RPM=more HP
Lower RPM=More TQ

 

And yet another thing I don't get. It does NOT matter -- you don't have "an extra 1000rpm" for more freeplay on downshifting.

You're going in hot, 3rd gear at 85mph... you brake, downshift...
-And no matter what, it's all about what speed that 2nd gear allows.