Author Topic: MPG, Part 2  (Read 21005 times)

Offline MrFiveOh

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Re: MPG, Part 2
« Reply #30 on: November 17, 2016, 11:09:26 AM »
11/15
293.7 miles / 17.769 gallons = 16.52 mpg
$2.11 per gallon regular at shell, $37.65 to fillup


Not sure what is going on here.

Weather change? Causing different air fuel mixture possibly
1974 C-10 AKA "Smurf"
350/700R4 Hooker Headers 134-A A/C
4/5 Drop - Ridler 650 rims 20x8.5/20x10
Kenwood single din radio 2 IB-Flat Pioneer Subwoofers Rockford Fosgate Power 1000-bdcp amp

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #31 on: November 17, 2016, 05:35:11 PM »
11/15
293.7 miles / 17.769 gallons = 16.52 mpg
$2.11 per gallon regular at shell, $37.65 to fillup


Not sure what is going on here.

Weather change? Causing different air fuel mixture possibly

Could be.  Also, i notice when i fill up at Shell the mileage tends to differ more from average.   

Now, i will say this----that the carb that is on there now, while it runs great may not be optimally jetted for a 4.3;  Jeg's advertised it for 305's and 350's, so it may be a little rich.  i have not had time to get a 4.3 carb out of the junkyard and have it rebuilt.

Offline MrFiveOh

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Re: MPG, Part 2
« Reply #32 on: November 17, 2016, 05:36:14 PM »
11/15
293.7 miles / 17.769 gallons = 16.52 mpg
$2.11 per gallon regular at shell, $37.65 to fillup


Not sure what is going on here.

Weather change? Causing different air fuel mixture possibly

Could be.  Also, i notice when i fill up at Shell the mileage tends to differ more from average.   

Now, i will say this----that the carb that is on there now, while it runs great may not be optimally jetted for a 4.3;  Jeg's advertised it for 305's and 350's, so it may be a little rich.  i have not had time to get a 4.3 carb out of the junkyard and have it rebuilt.
Just get a tuning kit is what i would do.

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1974 C-10 AKA "Smurf"
350/700R4 Hooker Headers 134-A A/C
4/5 Drop - Ridler 650 rims 20x8.5/20x10
Kenwood single din radio 2 IB-Flat Pioneer Subwoofers Rockford Fosgate Power 1000-bdcp amp

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #33 on: November 19, 2016, 07:51:40 AM »
Also, i'm pretty sure my converter is not locking up at any time.

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #34 on: November 28, 2016, 08:16:49 PM »
11/28
290.7 miles / 17.871 gallons = 16.27 mpg  :-[
$2.099 per gallon regular as Shell,  $37.51 to fillup.

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #35 on: December 05, 2016, 07:02:13 PM »
303.9 miles / 16.045 gallons = 18.94 mpg
$2.29 per gallon regular at Mobil, $36.89 to fillup

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #36 on: December 12, 2016, 07:04:34 PM »
258.9 miles / 16.613 gallons = 15.58 mpg  :(
$2.299 per gallon at mobil  $38.19 to fillup



i was having a little problem with the fast idle cam---it would not come down from low/mid step for some reason for about 2 days.  The choke, as far as i know however, did work ok.

« Last Edit: December 12, 2016, 07:50:29 PM by Stewart G Griffin »

Offline MannyDantyla

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Re: MPG, Part 2
« Reply #37 on: December 19, 2016, 11:45:10 AM »
That's some good MPG!

I'm getting about 15mpg highway. I can't calculate overall though because my speedo and odometer are not callibrated to tire size. What I do is find a gas station (point A) and fill up the tank completely. I drive down the highway to where ever I'm going and find a gas station (point B) and fill up there. However much fuel I just added to the tank is exactly how much I used to drive from point A to point B. Then I use google maps to see how many miles it was from point A to point B. Then divide that number my the number of gallons of gas used.

I have a SWB K10 half ton. SBC 350 with 305 HO heads, sm465, 33" tires and 3.42 gears. Edelbrock 1400 carb (this is the 50-state legal, EGR, high MPG model for California). Long tube headers with true dual exhaust.


Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #38 on: December 21, 2016, 07:43:59 PM »
12/21
297.6 miles / 18.1 gallons = 16.44 mpg 
$2.239 per gallon regular at Shell,  $40.53 to fillup


 :(

i am having a little issue with the high idle.  Also i think the Mr. gasket air cleaner #1487 is already clogged, but not totally sure.

Offline redhot1.4

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Re: MPG, Part 2
« Reply #39 on: December 23, 2016, 03:14:27 AM »
Man what's up the sad faces
An old school chevy pulling those kind mpgs. Is awsome,  I stop checking mine,, I stop trying to milk the old truck. And drive it like I stole it until I get me an overdrive

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Offline gunrac

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Re: MPG, Part 2
« Reply #40 on: December 23, 2016, 07:02:30 PM »
HA HA 12 MPG....... Loaded or empty........always good 4 me......but it does work.....    85' 4x4 350.......
« Last Edit: December 25, 2016, 08:18:43 AM by gunrac »
Never Apologize..........as it shows signs of weakness

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #41 on: December 24, 2016, 09:15:11 PM »

Offline 79 Royal Sierra

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Re: MPG, Part 2
« Reply #42 on: December 30, 2016, 12:43:45 PM »
U are better gas mileage then my 14 GMC Z71 with 6" lift and 35s. I think that is pretty good.

Offline Stewart G Griffin

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Re: MPG, Part 2
« Reply #43 on: December 31, 2016, 01:22:21 PM »
NOTE:  Not accurate or official

313.8 miles / 17.095 gallons = 18.35 mpg
$2.259 per gallon regular at High's,  $38.62 to fillup

i don't think this is entirely accurate because my electronic speedo is acting up and actually went totally kaput today.   If anything i think the total miles should be higher.

i will have to fix the speedo or get a new one.

This is the Cyberdyne digital speedo/tach combo which worked well for the past 8 years and 20,000 miles.

i think it's best to put the mpg measurements on hold until then.

Offline Irish_Alley

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Re: MPG, Part 2
« Reply #44 on: December 31, 2016, 01:52:07 PM »
use your phone and get a gps app
If you canít tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes