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Re: Gas Mileage [Re: abcde06991] #752634
September 23rd 2019 12:15 am
September 23rd 2019 12:15 am
Joined: Sep 2019
Posts: 15
Santa Rosa
N
No_Sprk Offline
stranger
No_Sprk  Offline
stranger
N
Joined: Sep 2019
Posts: 15
Santa Rosa
My 77 shorty g10 250ci th350 I just went to Portland and back and with all the hills I got between 14-15mpg. The thing falls on its face just looking at a hill.


1977 G10 SWB 250ci TH350 3.08 10bolt
Re: Gas Mileage [Re: abcde06991] #753074
October 06th 2019 4:00 pm
October 06th 2019 4:00 pm
Joined: Oct 2019
Posts: 6
SE MN
txmnjim Offline
stranger
txmnjim  Offline
stranger
Joined: Oct 2019
Posts: 6
SE MN
that sux. heck, that's as bad as some RVs frown
jim

Re: Gas Mileage [Re: abcde06991] #753078
October 06th 2019 6:08 pm
October 06th 2019 6:08 pm
Joined: Feb 2002
Posts: 483
vanland Des Moines
Lionvan Offline
addict
Lionvan  Offline
addict
Joined: Feb 2002
Posts: 483
vanland Des Moines
That's what I get with my 90 Chev. 3:42 axle.


[IMG]A foolish faith in authority is the worst enemy of truth. Question Authority.
Re: Gas Mileage [Re: abcde06991] #753139
October 07th 2019 9:53 pm
October 07th 2019 9:53 pm
Joined: Sep 2017
Posts: 57
MN
JAGI410 Offline
journeyman
JAGI410  Offline
journeyman
Joined: Sep 2017
Posts: 57
MN
Last trip with the 5.3/4L60E/3.42 at 70mph was 18.6mpg with a few passes at 80mph or so. Pretty flat roads and no traffic.


Jason
1984 Chevy G20 5.3L/4L60E
Re: Gas Mileage [Re: abcde06991] #753142
October 07th 2019 10:23 pm
October 07th 2019 10:23 pm
Joined: Nov 2013
Posts: 1,238
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,238
West Texas
Well done! I had a 2000 Chevy company truck with the same drivetrain. Loved every minute of it! Nice Swap!

My 1969 327 smallblock with a Rochester 2BBL/ Hedman Headers, Granny 4 speed 4.11 rear in a 1970 C10 Shorty, would provide 15 MPG. That was turning 12 by 15 inch Jackman wheels with a 12 inch Winston offroad tire.

Demonstrating the efficiency that even stock modern Multi Port fuel injection, Ignition systems and especially newer electronic OD transmissions provide over earlier non OD transmissions, TBI EFI, Carbs and earlier stock ignitions. Cheers!

Van ON!

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