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-   -   Fuel Mileage??? (http://www.clubcobra.com/forums/classic-roadsters-ii/63678-fuel-mileage.html)

coosawjack 04-20-2005 05:01 AM

Fuel Mileage???
 
Not that any of us think fuel mileage is very important but I filled up yesterday and drove to my Ford dealership in Walterboro, SC to get some pieces for my Marauder.

When I got back to Beaufort I had logged 101 miles and refilling the tank took 3.9 gallons from the same pump!!! 25.897 MPG ain't too damn shabby for a fire breathing beast like this thang!!**)

Coosawjack :3DSMILE:

P Martin 04-20-2005 05:07 AM

6 1/2 glorious mpg!

tpiini 04-20-2005 05:08 AM

Holy crap! That's great! I'm betting that you are the forum mileage king. I get about 12 to 13 if I drive gently. And I only have a 289. But the 4.57 gears take their toll.

coosawjack 04-20-2005 05:16 AM

I have 3.08 gears and a T5-Z with a steep overdrive....70 MPH at 1900 RPM's but 4th is 1:1 where 70 MPH is about 2800 RPM's!!

I don't use OD until I am over 60 MPH....Seems like it lugs it a bit and it is TOO QUIET!!:cool:

Coosawjack:D

sgianino 04-20-2005 05:28 AM

oh about 7 city and 8 highway,and thats if i use nuetral on the hills:cool:

dscott 04-20-2005 07:29 AM

You guys probably won't believe this one. I sold a Cobra to a guy and we used an LT1 with the 700R4 trans. He drove the car from Minnesota to Georgia and he swears he got 42MPG. I suppose it's possible. The rear was a 8.8 with 327:1 gears.
Don

Goober 04-20-2005 07:37 AM

392 Stroker with TKO and 3:73. Good run last weekend with just a little bit of poking it, returned 17.2. Not bad for 450 HP.
Mark

Ron61 04-20-2005 07:44 AM

I would post mine with the Torino Cobra, but I have never got the hang of this fraction thing. I do know that I can drive to Redding, 12 miles, on a half tank. It has a 20 gallon tank. :CRY:

Ron :(

DonC 04-20-2005 08:03 AM

I wait till I'm at 1/4 tank and then fill it back up.
Fuel mileage is the least of my concerns.
DonC

Ford of France 04-20-2005 10:13 AM

Weenie mileage. My rice burner, 323 GTX AWD Turbo--tin can if there ever was one--beats all you guys. Racing it with studs on the frozen Wisconsin Lakes, it does well to get 3.9 mpg at consistent full throttle. Makes the original Daytona Coupes look like good candidates for the Mobil Economy Run.

computerworks 04-20-2005 11:21 AM

1 Attachment(s)
Ford of France's Ricer-Icer....

computerworks 04-20-2005 02:40 PM

1 Attachment(s)
One more of the gas-guzzling Ricer-Icer...

CWCobra 04-20-2005 04:27 PM

anyone want to take a guess at the street milage of a 427 shelby all aluminum stroked to 468ci with a the new tremac600s and an 850Holley?
i want to know how much money i should save for gas.

Conrad

terry251 04-20-2005 06:14 PM

Don, 42 mpg from an LT-1 with auto ain't possible...unless he coasted downhill all the way from Minnesota to Georgia. 30 mpg I would buy for highway mileage.

Terry

Jack21 04-20-2005 06:52 PM

'bout 17 highway.

Ibr8k4vetts 04-20-2005 07:27 PM

I got 11mpg with a tailwind:CRY:

capfel 04-20-2005 07:39 PM

Don,

Hook up the odometer and retest it. 42mpg for any V8 is close to impossible. Even the Honda V6 Hybrid claims no more then 35 mpg.

I get in the 17 mpg range for my mild 428 with 3:30 rear and a Tremec TKO. It has a .68:1.00 OD 5th gear. I'm run about 2000 rpm at 65 mph on the highway.

Chuck

RedBarchetta 04-20-2005 08:59 PM

Quote:

Originally posted by terry251


Don, 42 mpg from an LT-1 with auto ain't possible...unless he coasted downhill all the way from Minnesota to Georgia. 30 mpg I would buy for highway mileage.

Terry

Terry, hi. I had a '93 Corvette with LT-1/6 speed combo. In sixth gear at 70-75 mph, the motor would be turning 1800 rpm and the instant trip computer would often read mid 30's for miles per gallon. Of course, that was in a car that weighed around 3600-3700 lbs wet. Knock off a 1,000 pounds with a Cobra and I could see where that is "almost" possible with a highly efficient LT-1 with computer-controlled fuel injection. Just my $0.02.

As for my SPF with a guzzling Mighty Demon feeding a high-strung and stroked Windsor, I'm happy just to knock down 10mpg....on a good day when I don't get into the loud pedal too often. :LOL:

-Dean

dscott 04-21-2005 07:20 AM

I agree that 42 MPG sounds impossible but the guy swears it's true. The engine was a fuel injected LT1. The car was shipped to Germany and the guy also swears he runs consistent 155 MPH on the Auto Bahn.

This kind of sounds like the 200 MPG carb story!!!
Don

Excaliber 04-21-2005 09:57 AM

42 mpg steady state, flat to slight downhill, "instant and steady" reading based on the "trip computer" current readout. Not to be confused with "average mpg" at the end of the day, I would think.

My Grand Cherokee V8 will often "instant and steady" read 25 mpg on the trip computer. Reality check: Average 13-14 on a GOOD day, 10 or 11 on a bad one when it's fill up time!

My new 427 "street friendly" build of my FE appears to be doing slightly better than my old 6 mpg. I think I'm in the 8's now. :LOL:


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