When I did the driving school I went through 14.8 gal. of gas after four twenty minute sessions (I did this twice per day for two days so I went through 59.2 gal. of gas in 320 minutes or 5.3 hours of track time). I'm not sure how to figure the milage. I was turning laps at around 2 minutes 15 seconds (on a 2.9 mile track) and as I said we went twenty minutes per session. So 14.8 gal. in eighty minutes. As you can tell I'm not much of a math guy. Can anyone give me an idea? The guy that runs the school said the Miada's go from 26-27 MPG on the street to 7-8 MPG on the track. Did I give enough info to figure it?


Jerry

 

Well, 320 minutes divided by 2.25(2 minutes 15 seconds or 2 and a quarter minutes) is 142...So if you did 142 laps on a 2.9 mile track, then you traveled a distance of 412 miles...So 412 miles divided by 59.2 gallons is roughly 7 miles per gallon.....Hell, that is what I get around town in the L....

 

I'll be ok...end of the month here at work

 

20 minute session / 2.25 minutes = 8.89 laps in 20 minutes.
8.89 laps x 2.9 mile track = 25.78 miles

four sessions x 25.78 miles = 103.12 miles

103.12 miles / 14.8 gals used = 6.97 miles per gal.

(i think)

 

20 minutes at 2:15/lap = 9 laps per session. 9 laps at 2.9 miles/lap = 26 miles. 14.8 gallons/26 miles = .57 gallons/mile = 1.75 miles/gallon.

 

Obviously we all did GREAT on the math section of our SAT's...

 

Jerry,

I filled up at that Exxon/McDonals just before I got to the track and right after I left to find out my mileage. Saturday's mileage was just under 9mpg. However, Sunday's was right at 7mpg. I was definitely much faster Sunday. So I'm sure that's what accounts for the difference.

-Edward

 

DH, you forgot this part:

 

780/800 baby!

 

and I figured 2.5 MPG but edited my post so I didn't hear crap from Mrinaldi the math genius...

 

GEEK...

 

Edward,

You have mail. I have questions about your race rubber.

Jerry

 

my calculations are with mrinaldi.


BUT, if you want to be 95% confident this is correct, I will need to do a few more calculations and get a range of what the MPG would be.

 

DOH! You're right, multiply by 4 = 7 MPG. It's my son that just got an 800 on the math portion of the SAT!

 

I did a particularly long course a while back that was particularly WOT-intensive.
I brought my own fuel to the track and did 20 laps per day (3 mile course). I put 120 miles on the tank and had very little left. By the end I was having to back off the throttle on the straights due to the little remaining fuel sloshing away from the pickup in the tank. Average fuel mileage over those laps was 5.89 mpg. So I'd say 7mpg on a short-medium track is just about right