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06-23-2008, 09:47 PM
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#1 |
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Registered User
Join Date: May 2008
Location: metro Atlanta, Ga.
Posts: 196
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gas mileage
i have a 86 crewcab single wheel, it has a 350 4barrel and a 4 speed. i need to get more mileage, ( who doesn't ) would a 250 6 cyl. help any ? or is that a stupid idea, i don't haul or pull anything, just drive it around about once a week.
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06-24-2008, 03:02 PM
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#2 |
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Registered User
Join Date: Mar 2008
Location: Princeton, Ky
Posts: 41
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Re: gas mileage
Dude...86 crewcab....You'll be driving around with your foot on the floor getting it up to speed with a 250. I'm not sure you'll see any gain.
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Matt 91 GMC K-5 Jimmy 350/700R4/241/10boltX2 W/4:56's/locked. 6inch Softride on 35's. Starting to show signs of trail life... 86 Chev K-10 Short 383/350/208/10&12bolt Gonna be the pretty truck... |
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06-24-2008, 05:37 PM
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#3 | |
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I know the pieces fit
Join Date: Nov 2007
Location: MONTGOMERY, AL
Posts: 5,523
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Re: gas mileage
Quote:
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06-24-2008, 06:53 PM
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#4 |
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Registered User
Join Date: May 2008
Location: metro Atlanta, Ga.
Posts: 196
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Re: gas mileage
didn't think of that 250 pulling around all that weight. and 5 speed is a good idea i didn't think of. thanks guys, Art
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07-09-2008, 01:14 PM
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#5 |
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Registered User
Join Date: Jul 2008
Location: brandon, ms
Posts: 1
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Re: gas mileage
A friend of mine got this thing to help him get better gas mileage. It improved his gas mileage by about 10 miles a gallon and he was haulin a trailer. I'm ordering one myself. Go to www.poweryourcaronwater.com
Last edited by sshumat3; 07-09-2008 at 01:14 PM. |
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07-09-2008, 02:18 PM
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#6 |
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www.73-87chevytrucks.com
 
Join Date: Dec 1999
Location: Birmingham, AL
Posts: 6,935
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Re: gas mileage
My 1991 CC gets 17 highway @ 65 and 13 city. It is a 350TBI with 4L80E trans.
Swapping to a 5 speed with OD would help.
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Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com |
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07-09-2008, 04:04 PM
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#7 | |
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Senior Member
Join Date: Aug 2004
Location: Everett, WA
Posts: 2,316
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Re: gas mileage
Quote:
Hopefully my '87 can get close to that once I get rid of the 4.10's. It's a T400 so that will drag it down some. But I have 700r4 out of an '88 'Burb that I would like to swap over. Just not sure if the cost of a new driveline (plus other hidden expenses) will be worth it. I am not going to use this truck to "work" so I am on the fence.
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2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold) |
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07-09-2008, 06:00 PM
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#8 |
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In the Forgotten far North.
 
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: gas mileage
Check out www.gearvendors.com for an overdrive unit.
specs for 3spd auto trans http://gearvendors.com/cg2wd3s.html Specs for 4spd auto trans http://gearvendors.com/cg2wd4s.html Specs for GM manual trans http://gearvendors.com/cg2wdt.html Info for GM 4X4 applications http://gearvendors.com/4x4gm.html
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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07-09-2008, 07:15 PM
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#9 |
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Senior Member
Join Date: Apr 2002
Location: Portland , Tennessee , United States
Posts: 1,024
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Re: gas mileage
my crewcab gets 15mpg pulling a 4500 pound trailer and 18 unloaded on the interstate. i have a 6.2 diesel with a banks turbo.
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