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04-20-2005, 05:01 AM
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CC Member
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Join Date: May 2002
Location: Beaufort,
SC
Cobra Make, Engine: Classic Roadsters '66 427 Replica-SOLD
Posts: 299
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Not Ranked
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  |
04-20-2005, 05:07 AM
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CC Member
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Join Date: Oct 2004
Location: Massapequa,
NY
Cobra Make, Engine: ERA 427SC #621 silver/black stripes /427 center oiler
Posts: 163
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Not Ranked
6 1/2 glorious mpg!
__________________
Pat
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04-20-2005, 05:08 AM
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CC Member
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Join Date: Mar 2002
Cobra Make, Engine:
Posts: 302
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Not Ranked
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.
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04-20-2005, 05:16 AM
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CC Member
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Join Date: May 2002
Location: Beaufort,
SC
Cobra Make, Engine: Classic Roadsters '66 427 Replica-SOLD
Posts: 299
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Not Ranked
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!! 
Coosawjack  |
04-20-2005, 05:28 AM
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CC Member
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Join Date: Jul 2003
Cobra Make, Engine: era#671 Keith Craft Motor
Posts: 424
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Not Ranked
oh about 7 city and 8 highway,and thats if i use nuetral on the hills |
04-20-2005, 07:29 AM
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CC Member
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Join Date: May 2000
Location: Sauk Centre,
MN
Cobra Make, Engine: Owner, Classic Roadsters II
Posts: 1,347
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Not Ranked
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
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04-20-2005, 07:37 AM
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CC Member
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Join Date: Nov 2003
Location: Houston,
TX
Cobra Make, Engine: Superformance #1374 with 392 RDI Stroker
Posts: 502
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Not Ranked
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
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04-20-2005, 07:44 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,554
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Not Ranked
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. 
Ron  |
04-20-2005, 08:03 AM
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Senior Club Cobra Member
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Join Date: Jun 2003
Location: West Linn,
OR
Cobra Make, Engine: ERA #684, 428 FE, TKO600
Posts: 1,378
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Not Ranked
I wait till I'm at 1/4 tank and then fill it back up.
Fuel mileage is the least of my concerns.
DonC
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04-20-2005, 10:13 AM
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CC Member
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Join Date: Nov 1999
Location: St. Paul,
Mn
Cobra Make, Engine: CSX 2189
Posts: 319
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Not Ranked
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.
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04-20-2005, 11:21 AM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Northport,
NY
Cobra Make, Engine: Kirkham, KMP178 / '66 GT350H, 4-speed
Posts: 10,362
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Not Ranked
Ford of France's Ricer-Icer....
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04-20-2005, 02:40 PM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Northport,
NY
Cobra Make, Engine: Kirkham, KMP178 / '66 GT350H, 4-speed
Posts: 10,362
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Not Ranked
One more of the gas-guzzling Ricer-Icer...
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04-20-2005, 04:27 PM
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Club Cobra Member
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Join Date: Dec 2004
Location: Roslyn Heights,
ny
Cobra Make, Engine: CSX4819, 427 all aluminum
Posts: 76
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Not Ranked
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
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04-20-2005, 06:14 PM
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CC Member
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Join Date: Apr 2004
Location: Frederick,
CO
Cobra Make, Engine: SPF Roadster, 418W
Posts: 385
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Not Ranked
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
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04-20-2005, 06:52 PM
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CC Member
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Join Date: Jun 2001
Location: Washington DC Metro (Virginia),
VA
Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
Posts: 1,895
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Not Ranked
'bout 17 highway.
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04-20-2005, 07:27 PM
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Senior Club Cobra Member
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Join Date: Jan 2001
Location: Santa Barbara, Ca.,
ca
Cobra Make, Engine: R.U.C.C. with a 427FE, toploader
Posts: 1,435
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Not Ranked
I got 11mpg with a tailwind
__________________
Mike Z
Nothing sucks more than that moment during an argument when you realize you’re wrong.
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04-20-2005, 07:39 PM
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CC Member
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Join Date: Jun 2003
Location: New Haven,
CT
Cobra Make, Engine: Everett-Morrison, 428FE, glove box signed by Carroll Shelby
Posts: 52
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Not Ranked
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
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04-20-2005, 08:59 PM
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Banned
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Join Date: Oct 2003
Location: Yorba Linda,
CA
Cobra Make, Engine: SPF w/392CI stroker
Posts: 3,293
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Not Ranked
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
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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. 
-Dean |
04-21-2005, 07:20 AM
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CC Member
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Join Date: May 2000
Location: Sauk Centre,
MN
Cobra Make, Engine: Owner, Classic Roadsters II
Posts: 1,347
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Not Ranked
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
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04-21-2005, 09:57 AM
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Senior Club Cobra Member
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Join Date: Jul 2002
Cobra Make, Engine:
Posts: 15,712
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Not Ranked
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. |
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