The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-27-2008, 10:18 AM   #1
The Big Green
Registered User
 
Join Date: Oct 2007
Location: Fort Smith,AR
Posts: 1,305
Need info, Gas mileage when towing

Just wondering what some people get, and with (at all possible) my setup. I have a 400t, 4.11's, and a stock 350, with 600 carb, 882 heads, and 270/455 RV cam. I'll be pulling, at most, a 2001 dakota cc, 4500lbs (I think) and a medium duty trailer my uncle pulls his tractors with, and it has electric brakes. I was just wanting a idea of what I may get when pulling.
The Big Green is offline   Reply With Quote
Old 07-27-2008, 12:04 PM   #2
Longhorn Man
its all about the +6 inches
 
Longhorn Man's Avatar
 
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
Re: Need info, Gas mileage when towing

5 to 8 MPG
Longhorn Man is offline   Reply With Quote
Old 07-27-2008, 12:34 PM   #3
mrein3
Registered User
 
mrein3's Avatar
 
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,253
Re: Need info, Gas mileage when towing

I have a fresh 383 and th350. 373 gears. 28 inch tall tires - stock height. The 383 has an Edelbrock 2101 intake and 1406 carb.

I pull a Triton TR19 that when on the trailer, fully dressed for a tournament comes in right around 3000 pounds.

I get 9.5 mpg towing. 13 on a REALLY good day when not towing.

Before I swapped in the th350 I'd get 10 mpg towing. That was with a standard, 3-on-the-tree manual.
__________________
'70 cab, '71 chassis, 383, TH350, NP205.
'71 Malibu convertible
'72 Malibu hard top
Center City, MN
mrein3 is offline   Reply With Quote
Old 07-27-2008, 01:12 PM   #4
Gray Ghost
Senior Member
 
Gray Ghost's Avatar
 
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
Re: Need info, Gas mileage when towing

I get around 8mpg but that's the max. My motor is a 355 with 10k on the clock and a new TH350/3.07 behind that.
__________________
Kelly
'05 GMC Sierra SLE Z71
Bone stock except for new bed rail caps.
Gray Ghost is offline   Reply With Quote
Old 07-27-2008, 07:26 PM   #5
The Big Green
Registered User
 
Join Date: Oct 2007
Location: Fort Smith,AR
Posts: 1,305
Re: Need info, Gas mileage when towing

Quote:
Originally Posted by Gray Ghost View Post
I get around 8mpg but that's the max. My motor is a 355 with 10k on the clock and a new TH350/3.07 behind that.

Gosh dang...lol...3.07's, I can see 8mpg max.

I had a 425hp 350 and got 10mpg and a 1000hp dakota with spray getting 13. I drive like a grandpa, maybe thats why my 67 gets 16
The Big Green is offline   Reply With Quote
Old 07-27-2008, 11:27 PM   #6
Gray Ghost
Senior Member
 
Gray Ghost's Avatar
 
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
Re: Need info, Gas mileage when towing

I get 11-12 normally. Course I never drive like grandpa...drive like that around these parts and you'll be dead in a day.

I'd sure like to ride along sometime and do the math on some of you guys talking about 14+ mpg on a truck that has 3.73 or 4.11 gears.
__________________
Kelly
'05 GMC Sierra SLE Z71
Bone stock except for new bed rail caps.

Last edited by Gray Ghost; 07-27-2008 at 11:36 PM.
Gray Ghost is offline   Reply With Quote
Old 07-28-2008, 12:07 AM   #7
whitesswj
Embrace the Redneck
 
whitesswj's Avatar
 
Join Date: Jan 2004
Location: Cabot, AR
Posts: 1,334
Re: Need info, Gas mileage when towing

id say about Half of what your normal mileage is.
__________________
'01 Camaro

Son, you just can't get there from here...
whitesswj is offline   Reply With Quote
Old 07-28-2008, 06:10 AM   #8
special-K
Special Order

 
special-K's Avatar
 
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,861
Re: Need info, Gas mileage when towing

Think of it as powering two vehicles with one motor.I don`t even consider milage when I`m working my truck like that.I`m just glad I can do it.I`ve never towed the same load through a whole tank of fuel to figure it out,if I wanted to know.
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim

"Don't call me a redneck. I'm a rough cut country gentleman"

R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
special-K is offline   Reply With Quote
Old 07-28-2008, 06:59 AM   #9
haysonj
Registered User
 
haysonj's Avatar
 
Join Date: Dec 2007
Location: Santa Maria, Ca.
Posts: 1,423
Re: Need info, Gas mileage when towing

I get between 10 and 12 towing the 4500 lb boat with my truck. Has 4.09 gears, 35 inch tires, T400 with gear vendors OD, and a fuel injected 350. I try not to go over 55 MPH. Hope to do a little better when I get my 383 back.
Attached Images
 
__________________
69 Chevy 4x4 383 Power
haysonj is offline   Reply With Quote
Old 07-28-2008, 07:33 AM   #10
special-K
Special Order

 
special-K's Avatar
 
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,861
Re: Need info, Gas mileage when towing

Now,to get a shot like that with the lake in the background.Nice combo!
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed"

GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project)
GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling)
Tim

"Don't call me a redneck. I'm a rough cut country gentleman"

R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~
special-K is offline   Reply With Quote
Old 07-28-2008, 10:59 AM   #11
The Big Green
Registered User
 
Join Date: Oct 2007
Location: Fort Smith,AR
Posts: 1,305
Re: Need info, Gas mileage when towing

Quote:
Originally Posted by special-K View Post
Think of it as powering two vehicles with one motor.I don`t even consider milage when I`m working my truck like that.I`m just glad I can do it.I`ve never towed the same load through a whole tank of fuel to figure it out,if I wanted to know.
I understand the pulling and everything. It is pulling 2 vehicles, but its also going down hill, and the back ones pushing...lol. You can get bad mileage pulling up hill, but better down hill. I don't care about gas prices, my new Jeep JK gets like 13 on a really good day...lol. Its my everyday driver, and I'm a FireFighter, so I can't drive my '06 SI that gets 35mpg. My wife drives the car, and I get the 13mpg gas hog. The way I see it, let gas go up, and I'll still do the career I love. I see you point, about if the truck can do it, and not really considering gas mileage. I started the tread because my gauge doesn't work, I need to fix it, but can't before the show thats coming up, so I'm just getting a idea of what to expect.


Gray Ghost
You welcome to ride with me anytime. I don't know how it does it, but I check by filling up, and driveing to a gas station and topping it off. That way I know how much gas it uses, and know how far it is to the station. You posted about how you can tell, and then changed it I guess.
The Big Green is offline   Reply With Quote
Old 07-28-2008, 11:04 AM   #12
The Big Green
Registered User
 
Join Date: Oct 2007
Location: Fort Smith,AR
Posts: 1,305
Re: Need info, Gas mileage when towing

Oh GRAY GHOST, think about how high your gears are, and you may not notice it struggling from a stop, when you take off. You may not nessasarily notice it, but if you truck had nuts, it would be using both right and left nuts, to take off. When I went from 3.08 to 4.11, night and day difference, and I kept them because I want to tow with my truck, and I want to leave the nuts alone, and free of being used.
The Big Green is offline   Reply With Quote
Old 07-28-2008, 12:32 PM   #13
steelhorse
Senior Member
 
steelhorse's Avatar
 
Join Date: Apr 2008
Location: Franklinton NC
Posts: 1,309
Re: Need info, Gas mileage when towing

2001 Dodge Ram off road 7mpg when towing and its fuel injected.If you want mpg towing deisel is the only way
steelhorse is offline   Reply With Quote
Old 07-28-2008, 12:48 PM   #14
The Big Green
Registered User
 
Join Date: Oct 2007
Location: Fort Smith,AR
Posts: 1,305
Re: Need info, Gas mileage when towing

NO DODGES HERE.... J/k, I had a 2001 with a 4.7 that towed my 67. I still have the 2001 dakota cc, but it now has a 1000hp stroker in it, so my 67 is having to take over on the towing. My mom had a 99 ram cc, 360, until a Tyson semi ran off the road one morning and over corrected, BAM, end of Dodge, they hold up great. I was the first one on scene(FireFighter) and the truck was Totaled beyond belief, but mom was ok, under the circumstances. I love a good Dodge, and would love a good cummins, but the trucks are not cheap, and neither is diesel.
The Big Green is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:15 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com