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#51 |
dang its hot
Join Date: Nov 2006
Location: frankfort kentucky
Posts: 1,349
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Re: Honest answers for your Longbed 350 Mileage?
305,700R4, 3:42=13.5 MPG...ticked off, decided if that is the mileage, might as well have fun...454,700R4,3:42, intake, holley spreadbore,headers, 3" exhaust=13.5 MPG, no curb is safe 84 shortbed
Last edited by grinch4om; 01-01-2010 at 11:05 AM. |
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#52 |
Registered User
Join Date: Jun 2009
Location: winston-salem n.c.
Posts: 475
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Re: Honest answers for your Longbed 350 Mileage?
2bit
Here is a honest answer to your question. I DONT KNOW...hope it made you laugh.
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1979 GMC Sierra 15 1986 Danco Rollback 454 4spd 1986 Jerr-Dan Rollback 454 4spd 1978 GMC Jerr-Dan 454 Tonawanda 4spd FOR SALE 85 Chevy Wrecker 454 4spd AATAC Always a Friend...Michael ![]() |
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#53 |
Watchin the rust grow
![]() Join Date: Oct 2008
Location: Western Nebraska
Posts: 950
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Re: Honest answers for your Longbed 350 Mileage?
When my pick up was as close to stock as it "ever" was, with a 168,xxx miles, headers, 2 1/4in exhaust, a mild RV cam, full time NP203 and TH350. Everything stock...it would pull off 6.5 MPG, everywhere. I imagine highway gas was sucked down by the full time 4wd, and I really kept my foot out of it in-town because more or less it ran like crap.
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1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done ![]() 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold
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#54 | |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: Honest answers for your Longbed 350 Mileage?
Quote:
I was making a general statement that just happened to be the next post after yours that going by the glove box sticker alone is not always correct. These trucks are around 30 years old so they could have gone through several gear changes by now, none of which are on the sticker. Mine has had different gears in it since it was a year old.
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miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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#55 |
Ridin' Dirty
Join Date: Oct 2009
Location: Ardrossan Alberta Canada
Posts: 2,193
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Re: Honest answers for your Longbed 350 Mileage?
I used to have an 85 GMC Sierra Classic halfton 2wd longbox, 350, turbo 400, 3:07 gears, heavy foot, I got 10 mpg. But the truck never ran right. I've heard that 1985 was the worst year for smog crap and that 86 was different again but better.
I currently drive a 1990 Chev V3500 crewcab 4X4 with a 350 and a turbo 400 and 35" tires. Its 6000 lbs. Its also gets 10mpg regardless of how I drive it.
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1978 C3500 Crewcab (Project) 1979 C2500 Crewcab (Driver/project) 1988 R2500 Crewcab (Driver) 1988 V3500 Crewcab 1988 R2500 Crewcab (Mint, Ex Fire Dept) 1968 Chev Suburban (4x4 conversion) LINK 1970 Chev C20 Suburban (driver/cruiser)LINK 2005 Impala (Incognito vehicle) 2004 Yukon XL Denali (Kid hauler) 1947 Case tractor Facebook Page(1000's of pictures of GM cars and trucks organized into albums) YouTube Channel |
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#56 |
Registered User
Join Date: Apr 2009
Location: hurlock md
Posts: 82
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Re: Honest answers for your Longbed 350 Mileage?
73 stepside fresh rebuilt 350 q-jet 600 longtubes (the way i got the truck) 700 r4 3.73 gears 235-75-15 maybe 8-10 mpg i know there is something wrong i need to look into it . any ideas??
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#57 |
Registered User
Join Date: Dec 2009
Location: MI
Posts: 111
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Re: Honest answers for your Longbed 350 Mileage?
I am running a 355 with Edelbrock goodies, hooked to an sm465/np205. I have 4.10 gears and 33" tires.
It's in a '77, and besides the newer clutch fan, I am running the stock air cleaner on top of the Edelbrock carburetor, and stock exhaust manifolds. If I stay under 70 mph, I get 14 mpg. Even though I have 33" tires, the 4.10 gears let the engine turn them without effort. After all, it's running about 2,600 rpms at 60 mph.
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-Josh "Mr. Simpson, there are thousands of people like you with no discernible talent." Duff World Records Division "Yeah, they're called Congress!!" -Homer Simpson |
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#58 |
Registered User
Join Date: Aug 2009
Location: Albuquerque New mexico
Posts: 169
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Re: Honest answers for your Longbed 350 Mileage?
stock rebuilt 4 bolt main 350, granny low 4 (3) speed, posi rear, 1974 long bed. I get about 18 on the road if under 70mph, and probably 13~15 in town.
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#59 |
Registered User
Join Date: Aug 2009
Location: Albuquerque New mexico
Posts: 169
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Re: Honest answers for your Longbed 350 Mileage?
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#60 |
Registered User
Join Date: Apr 2009
Location: hurlock md
Posts: 82
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Re: Honest answers for your Longbed 350 Mileage?
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