More MPG
Thread Starter
Instructor
Joined: Jul 2004
Posts: 130
Likes: 0
From: Naples FL
More MPG
With the current price of fuel, I have been trying to find ways to increase the "in town" mileage of my '92 LT1/auto daily driver. I would like to approach 20 MPG. Anyone with proven ideas about reaching this goal? I have been using C4s as daily drivers for over 20 years(SW Florida) and would hate to go some econobox. I have done all the typical tune-up proceedures and an now averaging between 16-17 MPG.
Burning Brakes
Joined: Jul 2007
Posts: 751
Likes: 0
From: Eau Claire Wisconsin
Putting extra air in my tires has always been good for an extra mile or two for me. A K&N air filter is also worth and extra one or two as well. Letting off the gas and coasting to stops sooner also helps. Keep us posted and let us know, I'am sure you can hit 20 mpg if you try. 
Racer
Joined: Nov 2005
Posts: 357
Likes: 0
From: Houston Texas
St. Jude Donor '08
I would imagine a big reason why a manual gets better gas milage is the easy ability to pop in and out of neutral and drop rpms down while coasting... Ive seen people do this in an auot car as well but keep in mind this will significantly change your breaking dynamics in an auto car.
taking this from personal experience of the feeling I had in the car when throwing the auto in neutral and braking... just felt completly differant
taking this from personal experience of the feeling I had in the car when throwing the auto in neutral and braking... just felt completly differant
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
With the current price of fuel, I have been trying to find ways to increase the "in town" mileage of my '92 LT1/auto daily driver. I would like to approach 20 MPG. Anyone with proven ideas about reaching this goal? I have been using C4s as daily drivers for over 20 years(SW Florida) and would hate to go some econobox. I have done all the typical tune-up proceedures and an now averaging between 16-17 MPG.
Race Director
Joined: Sep 2003
Posts: 16,835
Likes: 337
From: Database Error Indiana
[QUOTdaily driver. I would like to approach 20 MPG. Anyone with proven ideas about reaching this goal? I have been using C4s as daily drivers for over 20 years(SW Florida) and would hate to go some econobox. I have done all the typical tune-up proceedures and an now averaging between 16-17 MPGE=wpsrea;1564581746]With the current price of fuel, I have been trying to find ways to increase the "in town" mileage of my '92 LT1/auto .[/QUOTE]
I have been thinking along the same lines, lately. I may tweak on the fuel pressure and timing and do some datalogs this week. I think, if I can lean it out and bump up the timing a little, without getting spark knocks, it should help with mileage.
I have been thinking along the same lines, lately. I may tweak on the fuel pressure and timing and do some datalogs this week. I think, if I can lean it out and bump up the timing a little, without getting spark knocks, it should help with mileage.
Thread Starter
Instructor
Joined: Jul 2004
Posts: 130
Likes: 0
From: Naples FL
I aready run about 33lbs in the tires and am fairly easy on take-offs. If I shut off the A/C, I pickup 1-2 MPG but in SW Florida that is not possible about 90% of the time. At least not in a daily driver as the humidity is too high. I am looking into the "more air in-more air out" angle. K&N, headers(shorties), & mufflers elims.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
All you will do if you increase tire pressure very much is wear out expensive tires down the middle of the tread. It really won't make any noticeable difference on tires this wide, especially at low speeds in town.
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Safety Car
Joined: Dec 2006
Posts: 4,290
Likes: 6
From: St Marys GA
Speaking of tires, skinnier tires will help gas mileage. If you have 11" wide rears, but 9.5" back on all around. Maybe move to 8.5" fronts. Depends on how much you want it.
Also, theoretically speaking, lowering the car should help also. Less frontal area = less drag = better gas mileage.
Also, theoretically speaking, lowering the car should help also. Less frontal area = less drag = better gas mileage.
Instructor
Joined: May 2003
Posts: 179
Likes: 0
From: New Smyrna Beach FL
Mpg
I just swapped in a K & N, put on muffler elims (not sure if that helped but wanted the sound), installed the useless air foil (got it for almost nothing) and changed to synthetic oil last week. I am in central Florida and have a 95 auto daily driver - went from 22 to 24 so far so I'm assuming the changes helped a bit. I drive about 70 % highway / 30 % city. Also, I'm not using the A/C full time yet, only in the afternoon
but that will change in a couple weeks.
Thx
but that will change in a couple weeks.
Thx
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
Guess I am doing something right. I am avg 22.8 overall, with lot of backroad driving and I get little over 28 mpg on an interstate road trip.
And I do drive it hard and fast. SLP intake, muffler eliminators, hypertech tune (about useless), otherwise very much stock.
And I do drive it hard and fast. SLP intake, muffler eliminators, hypertech tune (about useless), otherwise very much stock.
Drifting
Joined: Sep 2005
Posts: 1,867
Likes: 3
From: Pasadena Maryland
I just read in Chevy High Performance that using Low Octane gas will take some timing out and DECREASE fuel mileage. Run high test, the ECM will NOT take away timing due to detonation and this should be the best fuel mileage.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Good throtle management is the key to better gas milage. Drive it like a Chevette instead of Corvette, light acceleration coast as much as you can and you will see a difference. I get 24mpg around town that way. Keeping the car moving is important too avoid routes that have a lot of stop lights when possible even if it means a little longer route
Le Mans Master
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From: Everett WA
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Don't drive like this:
http://temp.corvetteforum.net/c4/mrmojo2//shiftvid1.wmv
http://temp.corvetteforum.net/c4/mrmojo2//jump1.wmv
or we'll do this to you
http://temp.corvetteforum.net/c4/mrm...shovelhead.wmv
http://temp.corvetteforum.net/c4/mrmojo2//shiftvid1.wmv
http://temp.corvetteforum.net/c4/mrmojo2//jump1.wmv
or we'll do this to you
http://temp.corvetteforum.net/c4/mrm...shovelhead.wmv
Le Mans Master
Joined: Jan 2006
Posts: 6,564
Likes: 6
From: Woodstock Georgia
