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07-21-2009, 01:51 AM
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#1 |
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Building Dreams out of Dimes!
Join Date: May 2005
Location: Bonham, Tx
Posts: 892
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What's your fuel Mileage?
Just wondering how everyone was doing on fuel. So let us know what is your MPG and your setup. Thanks!
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07-21-2009, 02:11 AM
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#2 |
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6.0 powered square
Join Date: Feb 2008
Location: Mesquite texas
Posts: 3,459
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Re: What's your fuel Mileage?
I get about 5 to 8 in town that's with a sightly modified 350 with a junky quadra jet that's work wright very rarely also th350 and 373 gears
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Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326 Last edited by flamingbig10; 07-21-2009 at 02:12 AM. |
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07-21-2009, 02:20 AM
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#3 |
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Registered User
Join Date: Apr 2009
Location: Tucson, AZ
Posts: 184
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Re: What's your fuel Mileage?
why not swap it to a eddy and avoid probs?
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07-21-2009, 02:37 AM
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#4 |
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6.0 powered square
Join Date: Feb 2008
Location: Mesquite texas
Posts: 3,459
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Re: What's your fuel Mileage?
I had one but it was messed up by the past owner and was only getting 5 mpg on good day so got a rebuilt quadra jet and no luck couldn't get it tuned wright so I took it to a couple old school mechanics no luck it do good for a wile then next day it will bog down like crazy and spit and sputter, but I'm saving for a new carb so then I should be getting 8 or better
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Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326 Last edited by flamingbig10; 07-21-2009 at 02:39 AM. |
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07-21-2009, 02:42 AM
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#5 |
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Registered User
Join Date: Jun 2009
Location: Lubbock, TX
Posts: 1,671
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Re: What's your fuel Mileage?
getting about 9-10 in town with a 96' 355 vortec,has r/v cam, holley 750 double-pumper, and holley intake,
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07-21-2009, 02:43 AM
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#6 |
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78 Big10 454
 
Join Date: Jul 2008
Location: Pismo Beach, CA
Posts: 839
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Re: What's your fuel Mileage?
Stock 454 with a TH400:
10 mpg on a good day. 10 mpg on a bad day 10 mpg highway. 10 mpg city. 10 mpg empty. 10 mpg loaded. Did I miss anything? Last edited by 78 Big10 454; 07-22-2009 at 01:17 AM. |
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07-21-2009, 02:47 AM
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#7 |
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6.0 powered square
Join Date: Feb 2008
Location: Mesquite texas
Posts: 3,459
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Re: What's your fuel Mileage?
10 mpg is normal for a big block maybe 12 at best
__________________
Aaron 1980 c-10 short bed lowered, cammed 6.0, 4l80e 3600 stall, smp tune, wilwoods, and flames best time so far best et 7.86 @87 on motor 7.57 90 on a 75 shot Build http://67-72chevytrucks.com/vboard/s...d.php?t=283326 |
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07-21-2009, 02:51 AM
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#8 |
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Registered User
Join Date: Jun 2009
Location: Lubbock, TX
Posts: 1,671
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Re: What's your fuel Mileage?
my 81 with a 502 gets abt 10-12, r/v cam and MSD ignition with 650 eddy, thats about it on that one
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07-21-2009, 03:51 AM
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#9 |
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BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: What's your fuel Mileage?
~13-15 in the city if I pamper it. Lead foot eats gas.
Best of 19.5 MPG at 70 MPH ZZ4 355+ HP, 2500 stall, custom 700R4, 3.08, 255/60R15tires. A ton of body, engine and weight reduction work. Torque baby!!! |
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07-21-2009, 08:27 AM
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#10 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: What's your fuel Mileage?
22 mpg on the highway; it's an 87 V6, 4 speed manual overdrive (I think it's a .70 or .73 overdrive) and 3.73 rear axle.
I haven't checked mileage around town. K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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07-21-2009, 08:44 AM
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#11 |
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1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: What's your fuel Mileage?
I do about 2 gallons per mile..
 No, but seriously, I haven't done a real calculation, but I can't be getting better than 10 mpg... Mild 350, rv cam, headers, duals, 750 Edelbrock, th400, 3.73's... I'll be switching to TBI in the near future. MPG's should improve.
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Joseph Chavez  "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 Last edited by jchav62; 07-21-2009 at 08:45 AM. |
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07-21-2009, 08:46 AM
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#12 |
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Next project: 1970 K10
Join Date: Feb 2004
Location: Fort Collins, Colo 80524
Posts: 6,684
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Re: What's your fuel Mileage?
Best of 15.6 mixed driving. ~30,000 mile 1991 355, all stock with TBI, TH350 and 2.73's.
The winter that will be changing to a 5.3L Vortec, 4L60E and 3.42's.
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Bob 1970 Chevy K10 LWB "Goldie" 350/TH350 next project!! 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 07-21-2009 at 08:46 AM. |
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07-21-2009, 09:18 AM
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#13 |
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profeshinaly unimployed
Join Date: Dec 2008
Location: hazlehurst, GA
Posts: 1,232
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Re: What's your fuel Mileage?
about 8 or 10 in town and about 10 or 12 on the highway
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"having mud flaps is like asking for a smaller trophy" |
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07-21-2009, 09:34 AM
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#14 |
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Registered User
Join Date: Apr 2009
Location: Bend,Oregon
Posts: 225
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Re: What's your fuel Mileage?
i get 30 in town and 40 on the highway if i keep her under 70mph... in the 08 honda fit... lol... the truck isnt done yet
 so i dont know what i get with it !
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07-21-2009, 09:57 AM
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#15 |
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On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
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Re: What's your fuel Mileage?
383ci, 750cfm edel carb, m21 4 speed, 3.42 gears and 28" tall tires. I usually average around 15-16mpg mixed hwy/city. Usually around 17 on the highway. I bet I could break 20 with an overdrive!
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD |
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07-21-2009, 10:02 AM
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#16 |
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Registered User
Join Date: May 2008
Location: Austin TX
Posts: 531
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Re: What's your fuel Mileage?
Count me in, I get about 8mpg. 383/350/373gears. I wished I would have just saved for a 700r4.....
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07-21-2009, 10:14 AM
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#17 |
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profeshinaly unimployed
Join Date: Dec 2008
Location: hazlehurst, GA
Posts: 1,232
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Re: What's your fuel Mileage?
i forgot to add my specs i have a 400 small block 350 tranny and 4:10 ratio
__________________
"having mud flaps is like asking for a smaller trophy" |
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07-21-2009, 11:15 AM
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#18 |
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Registered User
Join Date: May 2009
Location: Houston, TX
Posts: 30
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Re: What's your fuel Mileage?
Best of 11.9 MPG
Average of about 10.5 MPG Mixed driving with majority around 50-60 mph ~5,000 mile rebuilt 1989 350: aluminum intake, 600 cfm edelbrock, headers, mild cam. TH350. Unknown rear gear. 28 inch tire Electric fans coming soon! 
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1981 C10 LWB – 350/TH350 – Work In Progress – 1st Vehicle
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07-21-2009, 12:05 PM
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#19 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: What's your fuel Mileage?
6.2 Diesel/700R4/NP208/3:42 pegleg
22 highway 17-20 city
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~Bradley~ 2004 Black GTO LS2/T56 too much to list  Miss having a truck
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07-21-2009, 12:20 PM
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#20 | |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: What's your fuel Mileage?
Quote:
K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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07-21-2009, 12:35 PM
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#21 |
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I have car A.D.D.
Join Date: Feb 2009
Location: Greeley, Northern Colorado
Posts: 4,147
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Re: What's your fuel Mileage?
7-9 around town last I checked. Have since changed my rear end and tires. I think it improved a little...I might be up to 8-10 in town now!
 I have an old 350, super low 4 speed, unknown rear gears, on 245/60/15s.
__________________
-Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here. |
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07-21-2009, 12:44 PM
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#22 |
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Registered User
Join Date: Feb 2008
Location: la
Posts: 345
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Re: What's your fuel Mileage?
350 with RV cam / 700r4 / 3.42 gears
8-10 City 15 Hwy Averaged 19 when I drove cross country drafting semi's This is also with an 83 Suburban |
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07-21-2009, 01:12 PM
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#23 |
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Registered User
Join Date: Jul 2007
Location: Ottawa Ontario Canada
Posts: 1,156
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Re: What's your fuel Mileage?
454 with Edelbrock perf rpm with Holley 750 cfm and headers, th400
8-10 MPG - If I beat on it, 4-5 MPG, maybe less. NASTY. |
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07-21-2009, 03:42 PM
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#24 |
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I have car A.D.D.
Join Date: Feb 2009
Location: Greeley, Northern Colorado
Posts: 4,147
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Re: What's your fuel Mileage?
And people ask us how we can drive them all the time.
__________________
-Gerald Building vehicles in memory of the first "car guy" I ever knew, my Grandpa. Bob Dunham 1935-2009. Rest in peace. 61 GMC Suburban SOLD The 86 build thread SOLD Are you a Colorado member?Click here. |
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07-21-2009, 07:28 PM
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#25 |
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Registered User
Join Date: Nov 2008
Location: Altus, Oklahoma
Posts: 679
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Re: What's your fuel Mileage?
Around town, no hard numbers, it varies from descent to terrible, depending on which gear I stay in and how light or heavy my right foot becomes at any given time. On the highway, most I could get out of a 120 mile trip was 10 mpg. But, if I was concerned about mileage, I sure wouldn't have built this particular engine
 ....671 blown and injected 383, manual/reverse TH 400 with brake, 4.56 rear with 31" tires.
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