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10-04-2009, 09:03 PM
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CC Member
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Join Date: Aug 2009
Location: Phoenix,
AZ
Cobra Make, Engine:
Posts: 1,956
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Not Ranked
Fuel mileage
I checked my mileage on the trip to Johns today.
I did 270 miles total and used 13 gallons of fuel.
So I got just a tad better then 20 MPG.
Does that sound about right for a easy road trip?(well it was easy on the way down as MikieC was leading and he never broke 55 MPH) on the way back I averaged about 80 MPH.
__________________
FFR MK1---Sold
Superformance #884 --- Sold
No more Furds.
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10-04-2009, 09:09 PM
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CC Member
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Join Date: May 2008
Location: Sacramento,Ca.,
Ca.
Cobra Make, Engine: Midstates (2001)
Posts: 1,724
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Not Ranked
thats not bad at all............
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10-04-2009, 09:20 PM
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CC Member
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Join Date: Aug 2000
Location: Glendale,
AZ
Cobra Make, Engine: SPF 468ci 550HP + 150HP NX Matching Shelby GT500 650HP
Posts: 4,235
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Not Ranked
Dan, you got a hybrid?
AZ Bob
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AZCOBRA, AZBOBS Plates & JAFMO
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10-04-2009, 10:08 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
DWRAT: What trans and gearing do you have.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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10-04-2009, 10:19 PM
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CC Member
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Join Date: Aug 2009
Location: Phoenix,
AZ
Cobra Make, Engine:
Posts: 1,956
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Not Ranked
Quote:
Originally Posted by Rick Parker
DWRAT: What trans and gearing do you have.
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T-5 trans and not sure on the gearing.
2000 RPMs = 75 MPH
2100 RPMs = 80 MPH
__________________
FFR MK1---Sold
Superformance #884 --- Sold
No more Furds.
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10-05-2009, 06:32 AM
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CC Member
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Join Date: Feb 2006
Location: Lake Havasu City, AZ,
AZ
Cobra Make, Engine: Arps/Burroughs/Hurricane/428FE
Posts: 1,346
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Not Ranked
My RPM's are about the same with a 3.25 rearend and a Tremic TKO w/.82 OD 5th gear.
My gas cosumption is a differednt thing...average 14.5 on the open road...hard to keep it under 80 mph.
Bill
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10-05-2009, 07:45 AM
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Senior Club Cobra Member
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Join Date: May 2007
Location: Mesa,
AZ
Cobra Make, Engine: Contemporary Classic, 428 FE CCX 3069
Posts: 7,507
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Not Ranked
Bill, You're doing better than I am. I get about 12.5 MPG on the road at 70-75 MPH. I can bump that to about 15 to 17 if I do 95 MPH. Turns about 2500RPM at 95 MPH.
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Dan in Arizona
CCX3209
"It's a great car and I love it, but it doesn't do 'SLOW' very well."
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10-05-2009, 07:50 AM
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Senior Club Cobra Member
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Join Date: Mar 2001
Location: Southern Connecticut,
CT
Cobra Make, Engine: SPF - 351W, 944 non-turbo
Posts: 2,105
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Not Ranked
Hey DWRAT:
Both of your numbers cannot be correct. If 2,000 RPM = 75, I calculate 2100 RPMs to be 78.75. Regardless, you are running a very tall top gear. My top gear is 2.54 (overall, 3.73 w 0.68 OD) and I turn 1,900 RPMs at 60 MPH.
Bob
Last edited by Bob In Ct; 10-05-2009 at 08:15 AM..
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10-05-2009, 07:51 AM
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CC Member
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Join Date: Jan 2009
Location: Las Vegas,
NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
Posts: 5,606
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Not Ranked
3.54 rear end, Tremec TKO600 with .82 rear end. Roush 427IR. I get about 18-19 on open road driving including in the mountains.
My crank only drives the alternator and water pump. Mileage increases when the HP goes to the rear end instead of accessories.
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10-05-2009, 07:59 AM
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CC Member
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Join Date: Aug 2009
Location: Phoenix,
AZ
Cobra Make, Engine:
Posts: 1,956
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Not Ranked
Quote:
Originally Posted by Bob In Ct
Hey DWRAT:
Both of your numbers cannot be correct. I calculate 2100 RPMs to be 78.75. Regardless, you are running a very tall top gear. My top gear is 2.54 (overall, 3.73 w 0.68 OD) and I turn 1,900 RPMs at 60 MPH.
Bob
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I agree my numbers don't calculate accurately at all but my general rule for speed is:
1900 = 70
2000 = 75
2100 = 80
That is more accurate then my speed which is off by about 8% or so.
__________________
FFR MK1---Sold
Superformance #884 --- Sold
No more Furds.
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10-05-2009, 08:32 PM
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CC Member
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Join Date: Mar 2003
Location: Wickenburg AZ- PHX, Cinci, Indy before,
AZ
Cobra Make, Engine: FFR Mk 3 408 530 - 585 T- mustang Dyno at B&R
Posts: 1,836
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Not Ranked
I don't know how anybody gets those  kind of numbers. Regardless I stop after 120 Miles and fill up because I don't trust the damn gage. I reset it each time I fill up. The gage is all over the place when you turn hard to port or hard to starboard 
It could be because of the Airstream I am pulling but I bet on a good day I am running 14 tops.  |
10-05-2009, 09:45 PM
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Senior Club Cobra Member
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Join Date: Jun 2000
Location: Gilford,
NH
Cobra Make, Engine: FFR 302 carb
Posts: 8,121
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Not Ranked
I get about 24 on the road.
Love a small block, 3:27 gears and .64 5th.
Mike
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10-05-2009, 10:24 PM
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CC Member
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Join Date: Oct 2003
Location: Bainbridge Island,
WA
Cobra Make, Engine:
Posts: 709
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Not Ranked
My 418W, 3.73 axle ratio, TKO 600 w/.64 OD gets 21 MPG at 70 mph at 2100 rpm on freeway. Around town....8-10.
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10-06-2009, 09:31 AM
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CC Member
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Join Date: Apr 2004
Location: Nampa,
ID
Cobra Make, Engine: ERA EXP002, 1968 PI 428 FE
Posts: 691
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Not Ranked
I've got two questions for you guys. 1. Did any of you buy your Cobras because of the "good" gas mileage that you get? and 2. When you get together with other car guys how many of you brag about your Cobras gas milage?  Sorry I just couldn't help myself  When I'm asked about mileage my usual answer is " I have no idea" or "who cares".
Dick |
10-06-2009, 10:04 AM
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Senior Club Cobra Member
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Join Date: Jun 2000
Location: Gilford,
NH
Cobra Make, Engine: FFR 302 carb
Posts: 8,121
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Not Ranked
Actually when I built mine I had long distance cruising in mind. I also wanted a very docile small Block, ie 325 HP. The good mileage is a by product of that build.
So it looks good, sounds good and performs well.
Mike
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10-06-2009, 10:31 AM
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CC Member
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Join Date: Feb 2007
Location: Valencia,
CA
Cobra Make, Engine: BDR #89, KCR aluminum 427 windsor
Posts: 322
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Not Ranked
8-10 mpg around town... about 12 mpg on long, extended cruises at 65-70 mph. Running a 3.73 rear end, a 0.82 overdrive, & a snotty cam in an aluminum 427W.
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R. Smith
Santa Clarita, CA
BDR #89- KCR aluminum 427 windsor, TKO-600
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10-06-2009, 01:40 PM
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CC Member
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Join Date: Aug 2007
Location: Carlsbad,
Ca
Cobra Make, Engine: SPF 2932 with 438 Lykins Motorsports engine. Previous owner of FFR 5452.
Posts: 2,616
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Not Ranked
8-10 around town and 12 on the hiway with a snotty wife sitting next to me.
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Jim
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10-06-2009, 02:47 PM
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CC Member
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Join Date: Jun 2001
Location: Mesa,
AZ
Cobra Make, Engine: ERA #2119 289FIA
Posts: 5,380
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Not Ranked
Mikiec, didn't you transpose your HP numbers? I thought your car was more like 235HP instead of 325.
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Karlos
"In the Land of the Pigs, The Butcher is King"
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10-06-2009, 03:26 PM
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Senior Club Cobra Member
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Join Date: Jun 2000
Location: Gilford,
NH
Cobra Make, Engine: FFR 302 carb
Posts: 8,121
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Not Ranked
Only when I let you pass me.
Mike |
10-06-2009, 06:09 PM
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CC Member
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Join Date: Jun 2007
Location: Phoenix,
AZ
Cobra Make, Engine: 65' SPF (511 CID) FE 427 Alum Block Shelby /Roush 600hp-625fpt sideoiler
Posts: 224
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Not Ranked
I get a whopping 8 to 10 in the city and a big 12 on the highway. Impressive isn't it??
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