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Old Oct 18, 2005 | 08:05 PM
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Default 99.0 mpg

Does anybody know why the maximum instantaneous mpg is 99.0? I can understand them limiting it to 2 digits for space reasons on the dic, but why can't it go up to 99.9? And yes, I have seen 99.0 inst mpg as I'm going down a steep hill at over 70 mph in neutral. wheeeee!!!

On the c6, they dropped the decimal point from the inst mpg.
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Old Oct 18, 2005 | 08:09 PM
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Because the only time you get 99+ mpg is coasting downhill at high speeds. This accounts for mabe .25% of an average person's driveing. Why would it need to go any higher?
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Old Oct 18, 2005 | 08:22 PM
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Originally Posted by saniterium92128
Why would it need to go any higher?
Because he, like me, is an engineer and we like gadgets with lots of numbers.

GTC ... weren't you in Starkville at MSU? When did you move to Austin?
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Old Oct 18, 2005 | 08:42 PM
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Originally Posted by RocketDawg
Because he, like me, is an engineer and we like gadgets with lots of numbers.

GTC ... weren't you in Starkville at MSU? When did you move to Austin?
Yup. I moved from Starkville to Austin about 3 months ago. I went to MSU many years ago, but was working for a private company there for 11 years. It was going downhill, I needed to change companies, and I landed in Austin. So far, life has been good here.

The 99.0 just feels limiting when I logically see that there is plenty of space for it to go to 99.9. Now if it could have shown me that I was doing 124.8mpg, that would have been cool.
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Old Oct 18, 2005 | 08:49 PM
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Originally Posted by saniterium92128
Because the only time you get 99+ mpg is coasting downhill at high speeds. This accounts for mabe .25% of an average person's driveing. Why would it need to go any higher?
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Old Oct 18, 2005 | 09:14 PM
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OK then, as engineers you'd (I hope) want to result to be meaningful as well as accurate...

However, to use the example given of "I have seen 99.0 inst mpg as I'm going down a steep hill at over 70 mph in neutral. wheeeee!!!" I would ask you, is this the amount of fuel needed to move the vehicle over a distance one statute mile or the amount of fuel coincidentally burnt during the period the vehicle moved one mile through the action of other forces? If it's the latter, then you might as well turn off the engine and let the DIC display three cherries.
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Old Oct 18, 2005 | 09:31 PM
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Correct, Chocoholic. Hence the in my post. I was kidding.
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Old Oct 18, 2005 | 09:33 PM
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Originally Posted by GTC
Yup. I moved from Starkville to Austin about 3 months ago. I went to MSU many years ago, but was working for a private company there for 11 years. It was going downhill, I needed to change companies, and I landed in Austin. So far, life has been good here.
Dang Gordon! You move as much as we do!

As a frequent flyer...oops, driver, I too spend some moments playing around with what I can do with the mileage....recently I set out to break 35 mpg on a 300 mile trip on an interstate between Knoxville and Columbus GA. In order to do that I had to stay in 6th at 78 mph, periodically coasting down a hill without cruise to "boost" my average .

Then on the same trip back, I used my wife's vette using the same theory but only got 30 mpg. So I wonder if I am travelling SOUTH, do I get better mileage...

MANY times I measured the trip back in the dark with headlights up...causing a reduction of 1.5 mpg on the same trip (though cooler air since I left at 3:00a).

Heck, I ran up and down my 1/4 street 30 times so I could stop in my garage to take pics when my pace car turned over 100k!

So yea, people with a lot of time spent in corvettes can think of the darndest things to do....
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Old Oct 18, 2005 | 09:40 PM
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Knoxville --> Columbus = downhill. Uphill on the way back.

I wondered how much the flip-up headlights hurt, but I've never tried to measure it.
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Old Oct 18, 2005 | 09:42 PM
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Originally Posted by RocketDawg
I wondered how much the flip-up headlights hurt, but I've never tried to measure it.
Maybe .5 mpg.
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Old Oct 18, 2005 | 09:54 PM
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Never seen 99.0 mpg on mine - now I'm going to have to try it just to see if I can get there.
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Old Oct 18, 2005 | 10:03 PM
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for your engineers...isn't the reason there isnt triple digit calculations is because of the chipset in the DIC? Doesn't it have a limited amount of numbers it can calculate?

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Old Oct 18, 2005 | 10:22 PM
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Originally Posted by Stangkiller
for your engineers...isn't the reason there isnt triple digit calculations is because of the chipset in the DIC? Doesn't it have a limited amount of numbers it can calculate?

I realise that this has descended into the silly and, in fairness to RocketDawg, please don't forget I come from a country where the ;-) is often implied in our humour, but the number of digits displayed in 99.0 and 99.9 is actually the same. Stangkiller, you're probably thinking of accuracy or resolution but it's hardly relevant as that figure is not a true measure of what what is being discussed. Besides that, the DIC could display values greater than 99.0 with 4 characters (or three digits) or less using different number representations or notations.
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Old Oct 18, 2005 | 11:41 PM
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[QUOTE=RocketDawg]Knoxville --> Columbus = downhill. Uphill on the way back.

Being engineers, I would have certainly thought that you would know that you go DOWN South and UP North. It's basic elementary Geophysics.
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Old Oct 18, 2005 | 11:53 PM
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Originally Posted by chocoholic
I realise that this has descended into the silly and, in fairness to RocketDawg, please don't forget I come from a country where the ;-) is often implied in our humour, but the number of digits displayed in 99.0 and 99.9 is actually the same. Stangkiller, you're probably thinking of accuracy or resolution but it's hardly relevant as that figure is not a true measure of what what is being discussed. Besides that, the DIC could display values greater than 99.0 with 4 characters (or three digits) or less using different number representations or notations.
Hmm, there's something i was told the DIC couldn't do because of the chipset....guess it's not the MPG...i'll ask again tomorrow.

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