67-72 3/4 ton with good gas mileage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mitchfab · 06-16-2005, 01:51 PM

Whats it going to take to get 20 miles to a gallon with a 402?

Maximum Overdrive · 06-16-2005, 01:53 PM

Stick the 402 in the box and put in a straight six.

mikeoj · 06-16-2005, 01:53 PM

A miracle!!

chevyfarmer · 06-16-2005, 01:55 PM

A flat bed trailer, a tow bar, or a steep long hill, as long as the engine is not running.....

mitchfab · 06-16-2005, 01:57 PM

No Lets get serious!

dallas71 · 06-16-2005, 01:58 PM

I think we are all are being serious.....h@ll i can't evern get that on a newer truck with all of the bells and whistles!!

mitchfab · 06-16-2005, 01:59 PM

Can it be done with a 91 fi big block setup with a 400 tranny?

lilred67 · 06-16-2005, 01:59 PM

my 6 cylinder wouldn't get that with overdrive and 3.08's

mitchfab · 06-16-2005, 02:01 PM

These gas prices are bad! Lets all get together and make it better with a big block!

mitchfab · 06-16-2005, 02:03 PM

Anyone got a tbi smallblock that will get 20?

jtminton · 06-16-2005, 02:04 PM

I can do it, if you double the size of a gallon.

chevyfarmer · 06-16-2005, 02:05 PM

I would highly doubt that the th400 would be what you are looking for but a 700r4 might be. This has kinda got me thinking, what is the best mileage anyone has got with a BBC? I just dont think of gas mileage as being a goal with a big block.

mitchfab · 06-16-2005, 02:06 PM

Ok I got a buddy with a 97 chevy that gets 24 with a 5.7

thecatseye66 · 06-16-2005, 02:07 PM

My C-20 396 with a Holley two barrel gets about 16 on the highway if I baby it. Around town or towing I'm just under 14--again, driving like a bluehair. I doubt I could do much to make it lower.

I just sit in the truck a lot now and pretend I'm driving real fast...

mitchfab · 06-16-2005, 02:09 PM

I would love to get a bb around 20 .I bet it would take a 4l60 or 80 to do it.

chevyfarmer · 06-16-2005, 02:11 PM

Quote:

Originally Posted by mitchfab

I would love to get a bb around 20 .I bet it would take a 4l60 or 80 to do it.

I would like 20 and I imagine a lot of people would like to get 20 with a SBC let alone a BBC, what do you mean by an 80?

mitchfab · 06-16-2005, 02:11 PM

Thats good for a two barrel!

mitchfab · 06-16-2005, 02:13 PM

A4L80 e But its computerised like the 60 is .Is there a way to get around that?

fastwillie 696969 · 06-16-2005, 02:15 PM

i'll be glad if i get 6 miles to the gallon

67ChevyRedneck · 06-16-2005, 02:16 PM

Quote:

Originally Posted by mitchfab

No Lets get serious!

Everyone is dead serious bro. My 2000 Z-71 with a 327 and fuel injection will get 18.3 highway if I'm easy on her. My 67 with 350/700R4/3.73 will get 16 highway. Even the brand spakin new chevy truck regular cab 2wd with the 4.3L fuel injected V-6 and a 5speed tranny is listed at 21mpg. 20 mpg out of a big block???? Fuel injection, fiberglass body, 6 speed, aluminum rims, skinny driver, empty bed.... and you shut it off and roll it down a hill for 5 of the 20 miles

I believe txfirefighter has said before that he has a 67-72(dont remember the year) with a straight six and 5speed (again, cant remember for sure) but I think he said he could get 21mpg with it??? I apologize if this is wrong, but my memory sucks.

mitchfab · 06-16-2005, 02:25 PM

Shoot I think it sounds good . Dont you all?

Robert1970C20rstbukt · 06-16-2005, 02:31 PM

A 350 with a 2bbl carb, 4 speed granny, spicer aux. trans, 4:10 rear, 33" tires.

When me and my dad drove the truck 80 miles to Seguin, Texas we got about 10.5MPG. Right now my Dad's been driving it back and forth to work 70 miles a day(because the 700r4 in his 85 Burb took a crap, that's a whole nother story), and it's been getting almost 13MPG! That's cool with me, but I want my truck back!

The truck has a 350/400/4:10's/33" tires, but I've worn the hell out of the 33s, gonna have to put the 31's back on.

mitchfab · 06-16-2005, 02:40 PM

Yea! I love a hard pullin big block when it pins you back in the seat and all you see is the sky. its time to hit the brakes and get in line for another pass .

farside847 · 06-16-2005, 02:52 PM

My 307 with a 3pd and 2bb carb gets 17, might be able to add one more if I didnt try to pass so many people

farside847 · 06-16-2005, 03:34 PM

you can try one of these... they sound like an infomercial though... bla bla bla save gas bla bla 20% increase bla bla bla helps you get girls bla bla bla

http://www.savefuel.ca/hydrogen.htm

06-16-2005, 01:51 PM	#1
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	67-72 3/4 ton with good gas mileage Whats it going to take to get 20 miles to a gallon with a 402?

06-16-2005, 01:53 PM	#2
Maximum Overdrive December 21, 2012 Join Date: Apr 2000 Location: Black Eagle, Montana Posts: 1,633	Stick the 402 in the box and put in a straight six. __________________ *"!Ama Sua, Ama Kjella, Ama Lllulla!"*

06-16-2005, 01:53 PM	#3
mikeoj Senior Member Join Date: Nov 2000 Location: WI,USA Posts: 495	A miracle!! __________________ 69 Lwb C-10 402/700R4 70 Lwb C-10 250/3pd Wisc.

06-16-2005, 01:55 PM	#4
chevyfarmer Registered User Join Date: Feb 2005 Location: Owosso, Mi Posts: 242	A flat bed trailer, a tow bar, or a steep long hill, as long as the engine is not running..... __________________ 67 short wide 355ci 3 on tree 69 short wide 250ci 3 on tree 68 long wide 283 3 on tree 72 2wd Blazer project 454 5 speed Last edited by chevyfarmer; 06-16-2005 at 01:56 PM.

06-16-2005, 01:58 PM	#6
dallas71 Registered User Join Date: Mar 2004 Location: Corinth,TX Posts: 444	I think we are all are being serious.....h@ll i can't evern get that on a newer truck with all of the bells and whistles!! __________________ My 1966 LWB Truck My 1966 SWB Truck

06-16-2005, 01:57 PM	#5
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	No Lets get serious!

06-16-2005, 01:59 PM	#7
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	Can it be done with a 91 fi big block setup with a 400 tranny?

06-16-2005, 01:59 PM	#8
lilred67 Senior Member Join Date: Mar 2005 Location: weatherford,texas Posts: 1,003	my 6 cylinder wouldn't get that with overdrive and 3.08's

06-16-2005, 02:01 PM	#9
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	These gas prices are bad! Lets all get together and make it better with a big block!

06-16-2005, 02:03 PM	#10
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	Anyone got a tbi smallblock that will get 20?

06-16-2005, 02:04 PM	#11
jtminton II Timothy 4:2 Join Date: Mar 2005 Location: Fort Worth Posts: 361	I can do it, if you double the size of a gallon. __________________ 72 C-20 2WD LWB Custom Camper Deluxe 350 4 Speed "Project Lazarus" MY TRUE PRIDE AND JOY "Dangit, Bobby, people will see that oil stain and think I'm a drunk."

06-16-2005, 02:05 PM	#12
chevyfarmer Registered User Join Date: Feb 2005 Location: Owosso, Mi Posts: 242	I would highly doubt that the th400 would be what you are looking for but a 700r4 might be. This has kinda got me thinking, what is the best mileage anyone has got with a BBC? I just dont think of gas mileage as being a goal with a big block. __________________ 67 short wide 355ci 3 on tree 69 short wide 250ci 3 on tree 68 long wide 283 3 on tree 72 2wd Blazer project 454 5 speed

06-16-2005, 02:06 PM	#13
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	Ok I got a buddy with a 97 chevy that gets 24 with a 5.7

06-16-2005, 02:07 PM	#14
thecatseye66 '68 C-20 396 CST CC Join Date: Mar 2005 Location: Spokane, WA Posts: 454	My C-20 396 with a Holley two barrel gets about 16 on the highway if I baby it. Around town or towing I'm just under 14--again, driving like a bluehair. I doubt I could do much to make it lower. I just sit in the truck a lot now and pretend I'm driving real fast... __________________ 68 C-20 396/TH400 CST Custom Camper NOW W/DISC BRAKES 01 Jetta Turbo Daily Driver 84 Yamaha Virago 700 - Alaska to Florida Via Maine & Mexico

06-16-2005, 02:09 PM	#15
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	I would love to get a bb around 20 .I bet it would take a 4l60 or 80 to do it.



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06-16-2005, 02:11 PM	#17
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	Thats good for a two barrel!

06-16-2005, 02:13 PM	#18
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	A4L80 e But its computerised like the 60 is .Is there a way to get around that?

06-16-2005, 02:15 PM	#19
fastwillie 696969 ~Rest In Peace~ Join Date: May 2005 Location: CALIFORNIA NOR CAL Posts: 9,707	i'll be glad if i get 6 miles to the gallon __________________ is it fast ? it has a lighting bolt donut? B___H please, I can remove 90% of your so called "beauty" with a kleenex

06-16-2005, 02:25 PM	#21
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	Shoot I think it sounds good . Dont you all?

06-16-2005, 02:31 PM	#22
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	A 350 with a 2bbl carb, 4 speed granny, spicer aux. trans, 4:10 rear, 33" tires. When me and my dad drove the truck 80 miles to Seguin, Texas we got about 10.5MPG. Right now my Dad's been driving it back and forth to work 70 miles a day(because the 700r4 in his 85 Burb took a crap, that's a whole nother story), and it's been getting almost 13MPG! That's cool with me, but I want my truck back! The truck has a 350/400/4:10's/33" tires, but I've worn the hell out of the 33s, gonna have to put the 31's back on. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck Last edited by Robert1970C20rstbukt; 06-16-2005 at 04:38 PM.

06-16-2005, 02:40 PM	#23
mitchfab Junk Chevy C20 Big Block Join Date: Jun 2005 Location: East Texas Posts: 68	Yea! I love a hard pullin big block when it pins you back in the seat and all you see is the sky. its time to hit the brakes and get in line for another pass .

06-16-2005, 02:52 PM	#24
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	My 307 with a 3pd and 2bb carb gets 17, might be able to add one more if I didnt try to pass so many people __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

06-16-2005, 03:34 PM	#25
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	you can try one of these... they sound like an infomercial though... bla bla bla save gas bla bla 20% increase bla bla bla helps you get girls bla bla bla http://www.savefuel.ca/hydrogen.htm __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

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