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02-08-2006, 12:22 PM
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#1 |
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Registered User
Join Date: Apr 2005
Location: Allen,TX
Posts: 115
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Realistic gas mileage
GM Goodwrench crate engine with a th350. Just wondering, thanks.
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Wilson 1972 Cheyenne LWB, 350ci TH-350. Restoration in progress. |
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02-08-2006, 12:32 PM
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#2 |
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Registered User
Join Date: May 2004
Location: Dickson, TN
Posts: 141
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Re: Realistic gas mileage
What gear is in your rearend?
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02-08-2006, 12:43 PM
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#3 |
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Registered User
Join Date: May 2004
Location: Chandler, AZ
Posts: 519
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Re: Realistic gas mileage
Equiped as below, a/c off, highway: 14mpg; a/c on : 12 mpg
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 69 C-10 LWB, 350, 700r4, 3.73 posi-traction, front disc brakes. Built for the desert- She can take the heat! Vivat Rex Chevus! 
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02-08-2006, 01:07 PM
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#4 |
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Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: Realistic gas mileage
My 77 with a 350 / TH350 / 3.73 combo is netting about 14 mpg right now. Any higher than 60 mph and that number falls rather rapidly, lol
700r4 is going in this weekend 
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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02-08-2006, 01:20 PM
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#5 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Realistic gas mileage
with a 2004r 4:10 gears i managed 16mpg highway at 75mph on long trips
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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02-08-2006, 02:12 PM
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#6 |
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Registered User
Join Date: Dec 2004
Location: Stephenville, Texas
Posts: 420
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Re: Realistic gas mileage
10 MPG highway 373 with 4 spd manual 4x4
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72 Super Cheyenne lwb 4X4 Ocra / White  88 Chevy 1 ton Dumptruck 88 Chevy 1ton Flat bed 4X4 white
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02-08-2006, 02:21 PM
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#7 | |
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Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Realistic gas mileage
Quote:
I swapped it to a th350. Now it gets 9.5. Better than 12 on the highway but still 9.5 overall.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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02-08-2006, 02:37 PM
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#8 | |
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Registered User
Join Date: Apr 2005
Location: Allen,TX
Posts: 115
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Re: Realistic gas mileage
Quote:
Thanks alot guys.
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Wilson 1972 Cheyenne LWB, 350ci TH-350. Restoration in progress. |
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02-08-2006, 02:44 PM
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#9 |
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A.K.A- Crummy
Join Date: Jun 2005
Location: NC foothills
Posts: 3,025
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Re: Realistic gas mileage
3sp manual-3.08-4x4-13 to 15 mpg.
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2003 Silverado Z71 Are fishermen all liars? Last edited by 1969 C/K CST; 02-08-2006 at 03:02 PM. |
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02-08-2006, 02:57 PM
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#10 |
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Registered User
Join Date: Sep 2005
Location: bedford Indiana
Posts: 70
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Re: Realistic gas mileage
With 700R4 and 3.08 gears I got about 11 mpg. Put in 3.73 gears getting about 12.5 mpg in 71 gmc swb 2 wheel drive.
Last edited by Buckman; 02-08-2006 at 02:59 PM. |
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02-08-2006, 02:57 PM
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#11 |
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Registered User
Join Date: Oct 2005
Location: Northern Arkansas
Posts: 1,142
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Re: Realistic gas mileage
My wife's '68 SWB with a 350, 10:1 dometops, 272 cam, gear drive, Edelbrock RPM intake, Holley Classic 600cfm carb, headers, and HEI, with a TH350 and 3:08 gears gets 15-16mpg daily driving.
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02-08-2006, 03:07 PM
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#12 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Realistic gas mileage
My 502HO-400T-3.07 in SB '72 gets from one station to the next. (if you coast when you can)
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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02-08-2006, 04:04 PM
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#13 |
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Active Member
Join Date: Apr 2005
Location: Miami, Florida
Posts: 286
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Re: Realistic gas mileage
With a stock 454, Th400 and 3.08 gears I get 9-12 in the city if I don't hit the funny pedal too much. Highway 12-15 from Miami to Orlando, 220miles, again no funny pedal...
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02-08-2006, 04:38 PM
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#14 | |
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Registered User
Join Date: Nov 2005
Location: Sacramento
Posts: 22
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Re: Realistic gas mileage
Quote:
funny pedal... --> cracking me up 
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02-08-2006, 06:12 PM
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#15 |
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Registered User
Join Date: Nov 2005
Location: Rouleau, Saskatchewan
Posts: 87
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Re: Realistic gas mileage
350, 3 spd & 3.08 gears and a canadian gallon 17 mpg
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02-08-2006, 06:13 PM
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#16 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: Realistic gas mileage
10 - 12 is the norm.
http://67-72chevytrucks.com/vboard/s...d.php?t=172346 |
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02-08-2006, 06:53 PM
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#17 |
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Registered User
 
Join Date: May 2005
Location: Blackfalds, Alberta
Posts: 604
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Re: Realistic gas mileage
What do ya guys think a 350 w/TPI, 4 spd manual, and 3.08 gears get? Just got the truck and havent had her out yet.
Edit: Forgot to add its also a 4x4.
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1971 Chevrolet K10 - SWB, 5.3LS, 4L60e 1970 Chevrolet K5 Blazer - Project 1969 Chevrolet C10 - SWB, 350 Holley Sniper, 700r4 1969 GMC Suburban - 5.3 LS, 4L60e Last edited by hevy_chevy67; 02-08-2006 at 06:55 PM. |
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