Fuel Mileage

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Jul 23, 2008 | 07:06 PM

billsfan

Thread Starter

Racer

Joined: Oct 2006

Posts: 396

Likes: 3

From: Buffalo New York

Fuel Mileage

My '76 L-48 is getting 14 mpg around town. It's got the standard 3.36 gears. Other than running rough when it's cold, the engine runs smooth and has decent pickup. Is 14 mpg normal ? If not, is a carb rebuild in order? I've already done a tuneup, with plugs, wires, and cap. adjusted the timing, etc.

Jul 23, 2008 | 07:15 PM

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

I have the same set up and I'd say 14 mpg in town is pretty good. Mine has always been around 10/11 in town and 14 or so on the road since day one when I bought it new.

Jul 23, 2008 | 07:36 PM

Young69Owner

Burning Brakes

Joined: Oct 2006

Posts: 1,044

Likes: 0

From: Henrico VA

I get 20.4 mpg in stop and go traffic, but I've done a lot of mods.

Jul 23, 2008 | 09:13 PM

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

Quote:

Originally Posted by Young69Owner

I get 20.4 mpg in stop and go traffic, but I've done a lot of mods.

What kind of mods?

Jul 23, 2008 | 09:20 PM

blckslvr79

Drifting

Joined: Jan 2008

Posts: 1,962

Likes: 5

From: Schererville IN

Quote:

Originally Posted by Jud Chapin

What kind of mods?

It's a hybrid!

Jul 23, 2008 | 10:29 PM

ram100987

Instructor

Joined: Sep 2006

Posts: 142

Likes: 1

14 is about what I got with most of the motors I put in my 80. I had 18 with the first 80 vette (First one I was hit and it was totaled, but I found another that could be it's twin) but the lobes were badly worn on the cam in that motor.

The new motor I just put in im hoping for the best... It has vortec heads and roller cam/lifters/rockers which should make it more efficient, but I put in a little bigger cam than I've put before so i'm not sure how badly that will hurt the milage

Jul 24, 2008 | 07:36 AM

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

Quote:

Originally Posted by blckslvr79

It's a hybrid!

Either that or he's going down hill.

Jul 24, 2008 | 10:15 AM

blckslvr79

Drifting

Joined: Jan 2008

Posts: 1,962

Likes: 5

From: Schererville IN

Quote:

Originally Posted by Jud Chapin

Either that or he's going down hill.

Maybe he idles all the time?

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Jul 24, 2008 | 12:05 PM

justanotherdoe

Racer

Joined: Mar 2006

Posts: 366

Likes: 1

From: Houston Texas

My 76 L48 is stock except for dual exhaust, and gets 14-15 in the daily commute traffic. Sounds normal to me...

Jul 24, 2008 | 02:05 PM

#10

TERRY CLARK

Pro

Joined: Aug 2006

Posts: 649

Likes: 8

From: COOKEVILLE TN

Quote:

Originally Posted by blckslvr79

Maybe he idles all the time?

...or a lot of coasting !

Jul 24, 2008 | 04:33 PM

#11

carnut114

Racer

Joined: Dec 2003

Posts: 263

Likes: 0

From: Kernersville Nc

I get 20 mpg on my original 72 ls5 454 with normal driving.

Jul 24, 2008 | 04:47 PM

#12

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

As one Forum member said, "I get 25 mpg. 11 in town and 14 on the highway.

Jul 24, 2008 | 04:54 PM

#13

mikecc

Advanced

Joined: May 2008

Posts: 70

Likes: 1

From: Pensacola FL

454 and 20mpg....

Jul 24, 2008 | 11:17 PM

#14

sly vette

Safety Car

Joined: Oct 2005

Posts: 3,570

Likes: 1

From: Algonac Michigan

Quote:

Originally Posted by blckslvr79

Maybe he idles all the time?

Wouldn't that be 0mpg???
And by the way...adjust or fix your choke.
Mark

Jul 24, 2008 | 11:34 PM

#15

Doug Maitlen

Instructor

Joined: Jan 2007

Posts: 115

Likes: 0

From: Jasper Indiana

I get anywhere from 30 to 40 cruising on the highway at a steady 60 mph.

Jul 25, 2008 | 12:10 AM

#16

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

Quote:

Originally Posted by Doug Maitlen

I get anywhere from 30 to 40 cruising on the highway at a steady 60 mph.

Seems kind of low to me.

Jul 25, 2008 | 01:27 AM

#17

chevr0letman

Advanced

Joined: Apr 2008

Posts: 91

Likes: 0

From: Stockton California

Quote:

Originally Posted by Doug Maitlen

I get anywhere from 30 to 40 cruising on the highway at a steady 60 mph.

Jul 25, 2008 | 07:07 AM

#18

Jud Chapin

Race Director

Joined: Sep 2001

Posts: 10,560

Likes: 439

From: Wellington, FL

St. Jude Donor '11 thru '25

Quote:

Originally Posted by chevr0letman

I think this was said in jest as is most of this thread.

Jul 25, 2008 | 09:05 AM

#19

sonnystingray

Racer

Joined: Aug 2007

Posts: 366

Likes: 2

From: deptford New Jersey

mpg

Wow, I thought I was doing good @ 45 fpg ( feet per gallon)

Jul 25, 2008 | 10:04 AM

#20

billsfan

Thread Starter

Racer

Joined: Oct 2006

Posts: 396

Likes: 3

From: Buffalo New York

Thanks for all the response guys. I guess I'll fiddle with the choke, then go look for another problem!!

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