Best fuel mileage?

[jbmatth]

I took mine on about a 1000 mile trip last summer mostly on I-44 to St. Louis and got 18-19 for the whole trip, I don't check it in town. But it does do better than my 4 cyl truck on the highway, and way more fun too.

[john chesnut]

I know the number sounds ridiculously high. I had never actually checked the fuel mileage but always thought that it was around 30mpg.

My car was designed so that all of the air going through the radiator exits the side of the car. It can not get into the engine compartment. My frame comes to a vee in the front and diverts the air out the side. I have an extra set of side vents and because of the frame design I do not have inner fender liners. My radiator sits straight up and down and is only 12 inches high and 18 inches wide. It has never overheated, even racing, so I know that my air flow is pretty good.

My son did follow behind my trailer, The trailer was loaded so I was going 60-62 on the freeway. I didn't count the 3 mile ferry ride.

I have a custom made racing fuel cell. I do not use the the Cobra fill cap to fill the car. I can see the fuel when filling and quit filling when it touches the lower edge of the recessed cap locking prongs.

Got to go. Taking the Cobra for an afternoon drive while the fall colors are still good and it's warm.

[john chesnut]

Sorry, double post.

[ha_pe_1968]

Hi!

Wow really impressed about some mpg's!!!!

I am far away from it...the best i ever had was on a long
highway drive in the rain... 16 mpg

Normally i am at 9-10 mpg...most driving on small mountain roads.

Its a Roush 427R with a 870 Holley and a dual intake - 450 RWHP

Glad that this car is only a toy...if i would use this car everyday it would make
me to a poor man with our petrol prices.

My old 1970 454 Auto Corvette needs 14 mpg at the same montain streets at more or less the same speed ...less HP and more weight

But the Cobra makes more fun on small montain roads as the Corvette...seems fun has nothing to do with economic (in my case)

Peter

[Jerry Clayton]

Last night I was fueling up my F350 diesel and next to me was a guy and gal with a pair of Harleys--I asked him if he wanted to switch fuel bills with me----then got into a discussion of the milage that he gets---aprox 35 mpg!!!!then he asked me and I told him the 19 that we average---he says"Boy, sure glad they got 35 because they couldn't afford to travel at my fuel cost"" I didn't botter to tell him that the math when I went to school would have my fuel costs less because he had TWO at 35 mpg which equates to 17.5 !!!!!!

[RichardCSX6000]

I have a CSX6000 with a Shelby 427/482 alum and 3.73 rear with W/R 4 speed top loader. I constantly get 5.5 driving 55, or around town. At first I though I had a leak! I have put around 700 miles on the car and it has never gotten any better.

[G-Pete]

Originally Posted by RichardCSX6000

I constantly get 5.5 driving 55, or around town.

I think there is something wrong - I can understand large old style engines naturally aspirated and large carburetors around 10mpg

...but 5.5 --- nah, take a closer look at your jets. The spark plug will show you the story.

[oleyellar]

About 30 laps. Maybe 33 with an occasional yellow flag....

More important would be tires per season, then you know the fun factor is up there.

[Jerry Clayton]

Wide , wrap around smiles cost fuel milage!!!!!

[ReMorton]

I'm getting 12 mpg around town. Last check was ~15 on I-5. Harleys get 43-45 mpg and C-4 corvette 18 mpg around town and 25+ on long trips...

[Mdman352]

ok. I have a 454 sideoiler with a Quickfuel 850, 3:54 gears, new Avons, and a new TKO 600 with a .065 overdrive. I just did 200 miles, 4-5 full throttle blasts and lots of 80 mpg cruising...... and I got 12.6 mpg. I was getting 9-10 mpg with the old toploader