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MPG what do you get

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

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MPG what do you get

Posted: 7/20/11 6:46pmMessage 21 of 29
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Victor, NY - USA
Joined: 7/12/2004
Posts: 6843
Vette(s): 2004 Commemorative Edition Coupe, Auto w/HUD. 13K miles in 2015. Sold 1982 Red Coupe
Jeff,
If you want better gas milage, change the axle ratio to 2.78 and put in an overdrive.
Then you will have a dog like mine.LOL
 
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MPG what do you get

Posted: 7/20/11 8:49pmMessage 22 of 29
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Coatesville, PA - USA
Joined: 3/17/2007
Posts: 370
Vette(s): 1978 Silver Anniversary Paint w/Mahogany Interior
Since putting the 700R4 in, we run anywhere from 19 to 27 mpg (Effingham trip) depending on how "bad we treat her", as Joel said.  55 mph on the highway yielded best results.  Before the 700R4...15-16
 
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MPG what do you get

Posted: 7/21/11 5:30amMessage 23 of 29
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Flanders, NJ - USA
Joined: 1/27/2004
Posts: 2556
Vette(s): 1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.
Hey Barb, don't you just love that first gear!Big smile
Dave



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Dave's '82


   

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MPG what do you get

Posted: 7/22/11 9:33pmMessage 24 of 29
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Joined: 3/13/2004
Posts: 537
Vette(s): Sold my Vette, living life in a tiny town with dirt roads, deer, peace and quiet. Living the life I dreamed of.
exactly the same as my 74 4 speed, just ran with it last week and was happy with 15mpg @ 70-75.Smile

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MPG what do you get

Posted: 7/23/11 10:21pmMessage 25 of 29
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Montesano, WA - USA
Joined: 9/27/2003
Posts: 1931
Vette(s): had a really nice one. sold it to a good friend. Purchased 2004 custom coupe in Feb. 2009 did not tell anyone here until August 2009. BAD I KNOW.
45 to 60 it's a hybrd.  sorry i just had too i will leave now
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MPG what do you get

Posted: 7/24/11 6:50amMessage 26 of 29
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HOWELL, NJ - USA
Joined: 5/18/2004
Posts: 6812
Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
[QUOTE=DaveM]Hey Barb, don't you just love that first gear!Big smile
Dave
[/QUOTE]

Davey, I love my first gear but the BFG TAs just haaaate it!! Evil Smile

Believe it or not, with the 700R4 in OD mode, the Lukester gets anywhere from 16-18 HWY.Thumbs Up

On local roads, its GPM, not MPG!! Clown

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MPG what do you get

Posted: 7/24/11 10:37pmMessage 27 of 29
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Darnestown, MD - USA
Joined: 1/1/2009
Posts: 32
Vette(s): "Ruby", is my 1982 Candy Red - my Daily Driver
"Ruby" is my daily driver, and after the ignition upgrade, running on regular gasoline (87) I've had a chance to run several tanks of gasoline and she is giving me an average of 18 miles to the gallon. City and highway mix 50-50.  I can't wait to take a long trip and find out what she'll do on a highway cruise.
Thumbs Up
TommySSE2011-07-24 22:38:45

Tommy
1980 Project Corvette - (Need suggestions)
1982 "Ruby" (Ain't She Sweet!)

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MPG what do you get

Posted: 7/25/11 6:22pmMessage 28 of 29
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WEST SENECA, NY - USA
Joined: 12/3/2001
Posts: 2383
Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.
On the last trip to Effingham I managed almost 23 mpg @ 70 mph. I had to go this slow due to a nasty vibration. I love my Tremec 5 speed.


GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

3.54 Dana 44
'69 "N11" Sidepipes
Borgeson Steering Box
Born 8/1981
Sequence #3975




Click here to see more pics of my Vette on CarDomain.


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Re: MPG what do you get

Posted: 12/4/11 4:18pmMessage 29 of 29
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Badin Lake, NC - USA
Joined: 4/21/2004
Posts: 127
Vette(s): 1979 Red L-48 Corvette with Doeskin interior, 3-speed automatic, 3.55 rear; 1986 L-98 Coupe, 4+3 Manual - Satin Black and Purple (SCCA TT/Hillclimb Car); 1993 White LT-1 Coupe, Black Interior, 6-speed
79 L-48 with 3.55 gears and 350THM auto:
Average of about 14 mpg with the former Rochester Carb.  Just upgraded with a GM performance parts manifold and Holley 4160 carb.  New dual exhaust (nice chambered dueal kit from Midamerica). Much better throttle response, much stronger acceleration off the line - about the same at upper RPM.  Gas guage seems to drop off a little slower, but hard to really tell as I seem to be on it frequently so I can enjoy the really crisp exhaust note. 
 
Guess it will be awhile before I drive it to maximize mileage....I am guessing sometime around the year 2035.Dead
 
In the end, we didn't buy these things for their outstanding economy.Smile
C3: 1979 Corvette Coupe, Auto, L-48, Red/Doeskin (my wife's fave);
C4s: 1986 C4 coupe (SCCA road race car), satin black, 4+3, Z51 package, L-98;  & 1993 C4 coupe, white, 6-speed, LT-1.
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