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01-31-2008, 07:04 AM
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#1 |
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Registered User
Join Date: Sep 2005
Location: philly burbs
Posts: 160
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Mileage?
Just curious... please post:
MPG (and method obtained) ENGINE (specs if possible) TRANSMISSION REAR RATIO 2WD/4WD YEAR OF TRUCK DRIVING STYLE (highway/local & heavy/feather-footed) Thanks, Ed |
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01-31-2008, 07:17 AM
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#2 |
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Registered User
Join Date: Jan 2008
Location: VA
Posts: 18
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Re: Mileage?
Just curious... please post:
MPG Really bad ENGINE Stock 305 until the summer TRANSMISSION 700r4 REAR RATIO 3.73 2WD/4WD 4wd YEAR OF TRUCK 1986 DRIVING STYLE Foot threw the floor board 24/7 |
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01-31-2008, 07:30 AM
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#3 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: Mileage?
MPG 10-10.5 mpg 160 miles takes right about 16 gallons.
ENGINE stock 305 with 235,000 miles TRANSMISSION th350 9in tailshaft non lockup. REAR RATIO 3.42 2WD YEAR OF TRUCK 86 DRIVING STYLE 75% city 25% highway. I don't flog it but it doesn't get any special treatment.
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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01-31-2008, 08:36 AM
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#4 |
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Registered User
Join Date: Jul 2004
Location: Spanish Springs, NV
Posts: 1,171
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Re: Mileage?
MPG: 14-15 Monthly calcs
ENGINE: Stock 350. RV Cam, Edelbrock 600 CFM Carb, No smog, Headers & Dual exhaust. TRANSMISSION: SM465 thru NP205 REAR RATIO: 3.08 2WD/4WD: 4WD YEAR OF TRUCK: 1980 K10 DRIVING STYLE: local commute 10 miles each way, no freeways. Moderate foot - normally don't romp on it. - Dave
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2003 Silverado K1500 Z71 - Arrival Blue 1973 K5 Cheyenne Blazer 350/TH350/NP203 Kids Trucks:92 K1500 Blazer 5.7/700R4 4" lift. RETIRED: 1980 Scottsdale 4x4 Founding Member: "TILT WHEEL BELLY." Club |
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01-31-2008, 08:52 AM
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#5 |
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Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Mileage?
MPG: 14-15 steady on highway City No need to measure---to much horsing around.
ENGINE: Bored and stroked 385, Dart heads, Comp Cams roller, Edelbrock 650 Carb TRANSMISSION: T-700 Modified 700 R4 W non lockup converter REAR RATIO: 3.73 12 bolt Eaton posi 2WD/4WD: 2WD YEAR OF TRUCK: 1984 SWB DRIVING STYLE: Used to be daily,now a touring cruiser 75% Highway, 25% city HOT ROD POWER TOUR trips---many. |
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01-31-2008, 08:56 AM
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#6 |
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Registered User
Join Date: Feb 2006
Location: Ontario
Posts: 145
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Re: Mileage?
MPG: 25 anywhere
ENGINE: 5.9 Cummins non IC TRANSMISSION: NV4500 REAR RATIO: 3.73 12 bolt 2WD/4WD: 2WD YEAR OF TRUCK: 1979 Sierra diesel DRIVING STYLE: drive it like its stolen
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79 GMC Sierra 5.9 cummins, nv4500 |
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01-31-2008, 09:24 AM
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#7 |
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Moderator
 
Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,919
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Re: Mileage?
MPG: 14
ENGINE: 305 TBI TRANSMISSION: TH400 REAR RATIO: 3.73 2WD/4WD: 2WD YEAR OF TRUCK: 1987 DRIVING STYLE: bipolar
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'86 GMC C30 Crew ~ '86 C20 Crew ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '74K10 ~ '71 Cheyenne swb ~'50 3100 bagged ~ '80 Wife ~ Late model kids
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01-31-2008, 09:34 AM
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#8 |
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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: Mileage?
MPG: 18 MPG
ENGINE: Stock 305 with minor mods, 1406 Eddy, 1" swirl hole adaptor, 4.5" air cleaner, electric fans, 454 radiator, tonneau cover TRANSMISSION: 700R4 REAR RATIO: 3.08 255/60/15 tires 2WD/4WD: 4x2 YEAR OF TRUCK: 83 DRIVING STYLE: Cruise control 70 MPH! |
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01-31-2008, 09:50 AM
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#9 |
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Registered User
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
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Re: Mileage?
MPG: 14-15 Highway
ENGINE: 350 with Edelbrock Performer Cam, Performer Intake, Edelbrock 1405 carb, long tube Hedman headers, and LS1 electric fans. TRANSMISSION: TH350 REAR RATIO: 3.08 2WD/4WD: 2WD YEAR OF TRUCK: 1977 DRIVING STYLE: Mostly highway. City mileage sucks because of 2500 stall torque converter. Last edited by Pyrotechnic; 01-31-2008 at 09:50 AM. |
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01-31-2008, 11:03 AM
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#10 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,345
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Re: Mileage?
MPG maybe 5 or so
ENGINE 305 modified with edelbrock carb/intake TRANSMISSION leaking TH350 REAR RATIO unknown 10 bolt rear 2WD/4WD 2WD YEAR OF TRUCK 1982 DRIVING STYLE NYC heavy foot
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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01-31-2008, 11:33 AM
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#11 |
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Workaholic
Join Date: Oct 2002
Location: Katy, TX
Posts: 1,589
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Re: Mileage?
I HATE these mpg threads. Everyone wants to claim better mpg than the newer trucks that have fuel injection, OD, computers, etc. Please don't insult me--18mpg out of one of these bricks (especially with a carb)? Maybe, possibly, on a downhill run with a tail wind. . .
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1979 K-10 Silverado (work in progress) 1991 V1500 Subruban 1999 Suburban LT 4x4 2006 Suburban LTZ (daily driver) |
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02-01-2008, 12:04 AM
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#12 | |
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Registered User
Join Date: Sep 2005
Location: philly burbs
Posts: 160
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Re: Mileage?
Quote:
What you should note though, is that almost everyone who posted reported getting somewhere in the 14-16 MPG range. |
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02-01-2008, 01:33 AM
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#13 |
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Registered User
 Join Date: Mar 2006
Location: Pensacola, FL
Posts: 1,461
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Re: Mileage?
MPG 13 (fill up, drive a few days, top off, divide miles driven by gallons pumped)
ENGINE stock 305 2bbl TRANSMISSION stock th350 REAR RATIO 2.56 2WD/4WD 2wd YEAR OF TRUCK 1980 DRIVING STYLE local, light to medium foot
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1986 C10 - LWB, 305/700r4, posi, vortec heads |
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02-02-2008, 07:09 PM
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#14 | |
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glamoros piece o' lowlife
Join Date: Mar 2007
Location: Redford, MI
Posts: 1,164
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Re: Mileage?
Quote:
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The more I drink, the more I drink, the more I drink... diesel, reg cab, long bed, 4 across the rear, single stack, wooden stakes, and lotsa lights - the Hay Express |
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01-31-2008, 11:38 AM
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#15 |
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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: Mileage?
Don't be a hater because your truck won't do it. It takes WORK!! I've put a lot of money in mods. Everthing needs to work together. It's more than theory. WORK WORK WORK!!
I'll put the same work into the ZZ4. I'll squeeze every bit out it for a daily driver. I'll make changes for the track because who cares how much fuel I burn up down the strip. Even new trucks get only 16 in the city. A coworker had a brand new crew GMC. Weight is different but with FI, I would expect more. Last edited by gchemist; 01-31-2008 at 11:40 AM. |
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02-01-2008, 09:26 AM
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#16 | |
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Workaholic
Join Date: Oct 2002
Location: Katy, TX
Posts: 1,589
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Re: Mileage?
Quote:
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1979 K-10 Silverado (work in progress) 1991 V1500 Subruban 1999 Suburban LT 4x4 2006 Suburban LTZ (daily driver) |
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02-02-2008, 01:22 AM
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#17 | |
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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: Mileage?
Quote:
There is more to tuning a carb, but for a novice mechanic it works great!! I use the vacuum guage on my 1406 Edelbrock. Average about 13-14 in the city, 3rd gear and 1800 RPM lockup. I have no idea what the new ZZ4 will put out. It may take some time before I learn to keep my foot out it!! 
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02-02-2008, 11:35 AM
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#18 | |
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Right on the line, baby!
Join Date: Oct 2003
Location: Phila, PA 19130
Posts: 1,486
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Re: Mileage?
Quote:
If anyone wants a PDF of this page, PM me & I'll email it to you. I'd post it, but it's too big (240K). Sorry, almost forgot- MPG: low 20s hwy (Driving like a granny, not mine tho' she's got a lead foot.) 305 700R4 2WD 2.73:1 83 LWB 17 hwy (Easy, easy on the gas) brand new 406 the rest is the same. Now, with mods to stock Q-jet carb, I think it's less, but haven't checked.
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83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here! Last edited by PhilaTruck; 02-02-2008 at 11:42 AM. |
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02-02-2008, 02:47 PM
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#19 |
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someday it will be done!
Join Date: Sep 2004
Location: Lloydminster,AB. Canada
Posts: 1,620
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Re: Mileage?
Interesting,99% small blocks so far.Where are all the BBs?
They may not be practical DDs but I'd like to see some numbers...maybe we just don't want to know?
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'72 C-10 Proud owner of a million new and used pieces that used to be and will once again be(god willing) a testament to the term "they don't build em like that anymore.    '80 LWB 2wd beater '67 GMC long fleet (cab donor) '66 long step (parked till it's turn comes around) '65 short step (parts truck that will donate it's bed and possibly frame to the '66) '06 Grand Prix wife's car (she hardly lets me touch it) my pics |
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01-31-2008, 11:49 AM
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#20 |
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Registered User
Join Date: Nov 2004
Location: Roanoke, AL
Posts: 18
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Re: Mileage?
MPG 13 mpg (monthly caluated)
ENGINE 350 (target master 350, edelbrock 1405, otherwise stock) TRANSMISSION Turbo 350 w/ Cooler REAR RATIO 3.08 2WD/4WD 2wd YEAR OF TRUCK 1978 DRIVING STYLE 50/50 city/highway |
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01-31-2008, 12:20 PM
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#21 |
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The Crazy Machanic
Join Date: Jan 2007
Location: Nokesville Va
Posts: 1,437
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Re: Mileage?
MPG 13 -14
ENGINE = 350 1989 engine was tbi now carberated and stil tbi cam all rest is stock exsept headers intake and caberator. TRANSMISSION = th350 with band m shift kit and larger valves REAR RATIO = 308 2WD/4WD = 2wd YEAR OF TRUCK 1986 silverado DRIVING STYLE local job is only 10 minutes away and no traffic, and high way some times but not normal
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*1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) * 1970 chevelle 2dr sedan Latest update June 24 2007.  *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad)  newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one
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01-31-2008, 12:38 PM
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#22 |
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Registered User
Join Date: Feb 2007
Location: Austin, TX
Posts: 3,930
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Re: Mileage?
I think overdrive is the biggest factor in these trucks getting decent mileage. If a carb is tuned right for cruising speeds and for the weather at that time of the year, then it's believable. No, it's not a constantly adjusting system like fuel injection is, but it'll be damn close.
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01-31-2008, 03:12 PM
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#23 |
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Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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Re: Mileage?
MPG 22 - 25 highway, 16 - 18 city. Calculated by comparing distance traveled vs fuel put in the tank.
ENGINE = Bone stock Vortec 4.3L V6 CSFI TRANSMISSION = NV3500 5 speed standard REAR RATIO = 3.42 2WD/4WD = 4x4 YEAR OF TRUCK = 1996 GMC DRIVING STYLE = 95% highway driving, very light on the pedal
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) Last edited by Russell; 01-31-2008 at 03:16 PM. |
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01-31-2008, 08:24 PM
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#24 |
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Next!
Join Date: Jan 2003
Location: Eastern Pa.
Posts: 2,483
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Re: Mileage?
MPG 12-14 estimated (totally stock)
ENGINE (specs if possible) stock 6.2 J code TRANSMISSION TH400 REAR RATIO 4:56s 2WD/4WD 4WD YEAR OF TRUCK 1986 M1028a1 DRIVING STYLE Local/Highway empty/loaded
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86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck |
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01-31-2008, 10:38 PM
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#25 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: Mileage?
I have gotten 16 mpg on an all highway trip. This was in my 84 2wd with a 355, Q-jet carb, hooker headers - dual exhaust, th400, 3.08 and 31x10.50 tires.
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