What is your MPG?
Thread Starter
Racer
Joined: Feb 2009
Posts: 330
Likes: 9
From: Las Vegas Nevada
What is your MPG?
I'm wondering what kind of MPG number others are getting out there. I've always tried to keep my car fairly economical while at the same time running decent at the track. Here are my numbers.
ZZ3, 200R4, 3.08, Q-Jet, AC off, 70MPH. 25MPG all highway
About 13.5 MPG average in the city.
After that I changed gears to 3.73 and installed the GM Hot Cam Kit and now I get 20 MPG with AC on and 21 MPG with it off highway. Still get about the same in the city.
Runs low 13s at about 105.
ZZ3, 200R4, 3.08, Q-Jet, AC off, 70MPH. 25MPG all highway
About 13.5 MPG average in the city.
After that I changed gears to 3.73 and installed the GM Hot Cam Kit and now I get 20 MPG with AC on and 21 MPG with it off highway. Still get about the same in the city.
Runs low 13s at about 105.
Last edited by Lil" Red Corvette; Dec 10, 2012 at 11:56 PM.
Thread Starter
Racer
Joined: Feb 2009
Posts: 330
Likes: 9
From: Las Vegas Nevada
Drifting
Joined: Jan 2012
Posts: 1,908
Likes: 129
From: Fredericksburg Virginia
I'm guessing 12 around town with my 370 HP LT-1 engine. I have a bit of fun with it, though.
Didn't do much interstate driving...not enough to gauge mileage.
New cam will have so much overlap that I'll be able to condense my exhaust directly into the gas tank to recover some fuel. I'll probably get 5 MPG then!
Honest truth, I wasn't deciding between this and a Prius when I made my decision. Crappy mileage sort of comes with the territory.
Didn't do much interstate driving...not enough to gauge mileage.
New cam will have so much overlap that I'll be able to condense my exhaust directly into the gas tank to recover some fuel. I'll probably get 5 MPG then!
Honest truth, I wasn't deciding between this and a Prius when I made my decision. Crappy mileage sort of comes with the territory.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Did my first TPI install on my stock engine '72 vert here in '95....long about Feb '97 I drove it here from Wash DC, 350, muncie, 336 rear and got 24 mpg......
got a roller cam engine with tons of history and mishaps and a 200 4r overdrive, same 336 rear I figger about the same highway...
and 15 around town....but MY around town is VERY short trips, not even 2 miles one way.....retarrrded so nowhere to go.....
got a roller cam engine with tons of history and mishaps and a 200 4r overdrive, same 336 rear I figger about the same highway...
and 15 around town....but MY around town is VERY short trips, not even 2 miles one way.....retarrrded so nowhere to go.....
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Safety Car
Joined: Sep 2011
Posts: 4,118
Likes: 1,230
From: Madeira Beach, FL
2024 C8 of the Year Finalist - Unmodified
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68 BB 427/390hp rebuilt to stock specs 10 mpg local.
I haven't had it on a long voyage yet so hiway mpgs may be
slightly better.
Marshal
I haven't had it on a long voyage yet so hiway mpgs may be
slightly better.
Marshal
Thread Starter
Racer
Joined: Feb 2009
Posts: 330
Likes: 9
From: Las Vegas Nevada
and thumbs up!!! 
Racer
Joined: May 2011
Posts: 373
Likes: 6
From: Dover Delaware
Best I ever got MPG...
Me and my 2 cents worth....78 coupe...stock 350/auto..no cat conv but running turbo muffs....15mpg highway.....cannot count parades and cruise-ins...........if so it would probably drop to 10mpg or worse.....
Am wondering if I should up the tire pressure to 35psi?????
Any comments???
Mike
Am wondering if I should up the tire pressure to 35psi?????
Any comments???
Mike
Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
Getting about 13mpg with a stock motor with headers and 2.87s out back. I know something isn't right. Sent my carb out to Lars. I'm sure I'll see some improvement in mpg after the rebuild.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
Stock motor on a L-48 with a 3.08 and Th350, 14 MPG before electric fans and carb rebuild. 22 MPG combined highway and town after.
Likely to be worse after new bigger cam and intake, but with bigger smiles. Fair trade.
Likely to be worse after new bigger cam and intake, but with bigger smiles. Fair trade.
