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04-15-2004, 05:24 PM
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#1 |
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Registered User
Join Date: Apr 2004
Posts: 3
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10 Mpg
my sons 84 c10 350/350 with 273's gets 10 miles per gallon. he really likes his truck, but i cant afford the gas! we have tried the 1406 edelbrock, the demon 525, and neither seems to run like it should. the engine has less than 2000 miles. it has an edelbrock intake. any ideas?
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04-15-2004, 06:59 PM
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#2 |
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Account Suspended
Join Date: Oct 2002
Location: Elkhart, IN
Posts: 6,399
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cam specs? CR? tire size? need more info...
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04-15-2004, 07:49 PM
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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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Sounds about normal to me. But it would help to know what all it has. Depending on what you have you might be able to get 2-3 more miles per gallon.
What size tires are on it also?
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
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04-15-2004, 08:14 PM
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#4 |
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Registered User
Join Date: Jan 2004
Location: glendale/tucson
Posts: 199
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put on a fuel injection kit and swap in a 700r4, that should give you better mileage. kinda pricey though.
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04-15-2004, 10:01 PM
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#5 |
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Registered User
Join Date: Jan 2004
Location: minnesota
Posts: 349
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I wish if was getting 10 miles to the gallon
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1982 chevy C-10, blue 2wd shortbox 17x9 cragar ss rims, 350V8-th400 2003 suzuki gsxr 1000-hit 175mph!!! yeah it's fast-no you can't ride it |
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04-15-2004, 10:24 PM
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#6 |
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Registered User
Join Date: Mar 2003
Location: Walker, LA
Posts: 2,925
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How does your son drive it? When I had that combo I was getting about 15MPG, but I had a 400 tranny.
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Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels |
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04-15-2004, 11:11 PM
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#7 | |
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DAMN, I love Big Blocks!
Join Date: Aug 2003
Location: New Mexico, USA
Posts: 619
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Quote:
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Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear. 
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04-15-2004, 11:58 PM
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#8 |
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Registered User
Join Date: Jan 2004
Location: Duluth, Mn
Posts: 162
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Is most of his driving done in town with lots of stops. If so those gears are killing the milage. They are for highway cruising. I gained milage in my 85 by switching to 3.73's when I had a 305. Still got high teens on the freeway with those gears. And believe this, my blown 383 that I currently have gets 10mpg IN TOWN!
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85 GMC 1/2 ton LWB 4150lbs. 383 SBC with Twin MPT70 Turbos 850 CSU carb TH375 3.70 gears Ultimate 10" Converter 10.11@136.6 with 1.64 60ft. on 10.5-31-15W
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04-16-2004, 12:06 AM
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#9 |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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my 305 got about 8mpg with my 2.73 gears
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04-16-2004, 12:21 AM
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#10 |
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Registered User
Join Date: Jan 2004
Location: Duluth, Mn
Posts: 162
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8mpg with a 305? I think thats the lowest i've ever seen out of one. Mine never got that low even with the truck loaded down full of cement.
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85 GMC 1/2 ton LWB 4150lbs. 383 SBC with Twin MPT70 Turbos 850 CSU carb TH375 3.70 gears Ultimate 10" Converter 10.11@136.6 with 1.64 60ft. on 10.5-31-15W
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04-16-2004, 08:44 AM
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#11 |
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Registered User
Join Date: Apr 2004
Posts: 3
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Thats 10mpg on the highway or in town. the cam is stock. the exhaust is stock, the engine is a 30 over reman. If i changed the gears, what would be a good ratio to run. He does mainly run in town now. not much stop and go. ive watched him drive, and he only ocasionaly gets in it.
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04-16-2004, 08:45 AM
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#12 |
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Registered User
Join Date: Apr 2004
Posts: 3
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oh and the tires are the normal 235 75 15
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04-16-2004, 09:22 AM
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#13 |
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Registered User
Join Date: Mar 2003
Location: Walker, LA
Posts: 2,925
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I would say go with a 3.42.
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Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels |
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04-16-2004, 10:37 AM
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#14 |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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His mileage may also be affected by how he drives it when you aren't watching. I always drove much more conservatively around my dad.
Slonaker |
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04-16-2004, 10:48 AM
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#15 |
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Registered User
Join Date: Mar 2004
Location: utard land, known to the rest of the world as utah
Posts: 120
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if he doesnt use his truck for towing or hauling stuff, it should be gettin better than that...tell him to get ajob an buy his own gas, i bet he starts getting better mpg....my old 86 3/4 burban ha a 350,granny 4spd, an 373 gears, with stock rims an tires, i got 10 mpg in town an 13 plus on the highway...but im past my hot rodding days to,(unless i have one.)
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if it aint got 4 wheels an a motor,its now worth talkin about...... if ya cant afford to buy it, then be hillbilly enough to build it, it's cheaper to build it anyway..... be a man, stand up to your women an tell them your the boss, an if she dont like that, then ask her if she needs help around the house... http://public.fotki.com/southernmutt33/ 84 GMC 454, 3/4 soon to be a dually with one ton suspension. 60 1/2, lwb stepside..for sale 98 taurus, ugliest body stlye ford ever built, but dependable family car. 73 vistaliner, cab over, newest toy, reason for turnin 3/4 into 1 ton |
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