Mods & milage
Thread Starter
Burning Brakes
Joined: Oct 2008
Posts: 800
Likes: 12
From: Wichita Kansas
Mods & milage
I am looking to get some real world feed back from those that have upgraded their engines as far as what kind of gas milage you get after the mods? I know it's kind of silly to think about gas milage and horsepower gains but I do love the 32mpg I get on long trips and the low 20's mpg I get in the city.
With that said I was thinking about a cam, heads, intake to the tune of about 500hp at the motor...
Anyone with mods like these? Or heck forced induction also, please chime in!
Thank you
With that said I was thinking about a cam, heads, intake to the tune of about 500hp at the motor...
Anyone with mods like these? Or heck forced induction also, please chime in!
Thank you
Le Mans Master
Joined: Nov 2009
Posts: 6,119
Likes: 156
From: Huntington tx
About 18-20mpg on average at about 500ish hp. I can play with the display and find a long downhill and get 25-35mpg but you know that's just wishful thinking and deceiveing yourself.
Some can get more, but I'm driving kinda laid back these days.
You got to remember, either you want more power or you want gas mileage but you must choose one.
Some can get more, but I'm driving kinda laid back these days.
You got to remember, either you want more power or you want gas mileage but you must choose one.
Safety Car
Joined: Jan 2012
Posts: 3,811
Likes: 14
From: Lake Fork TEXAS
About 18-20mpg on average at about 500ish hp. I can play with the display and find a long downhill and get 25-35mpg but you know that's just wishful thinking and deceiveing yourself.
Some can get more, but I'm driving kinda laid back these days.
You got to remember, either you want more power or you want gas mileage but you must choose one.
Some can get more, but I'm driving kinda laid back these days.
You got to remember, either you want more power or you want gas mileage but you must choose one.
Le Mans Master
Joined: Apr 2001
Posts: 5,477
Likes: 718
From: Black Forest CO
I have a 427 in my C5. I get 19-20 in normal driving and 26-30 on the highway. When I had heads/cam or heads/cam/super charger I got 20-22 in normal driving and 28-32 on the highway. These numbers are with 3.73 gears and a 6-speed.
Race Director
Joined: Dec 2004
Posts: 13,760
Likes: 75
From: Haymarket VA
Melting Slicks
Joined: Dec 2011
Posts: 2,234
Likes: 64
From: Gulf Coast Mississippi
St. Jude Donor '13-'14-'15
My 2000 frc with ls6 intake, full exhaust and cam kit that comes with the usual was averaging around 24 to 25 city highway combined, I have a heavy foot though. That was with stock heads and of course dyno tune, 418 at rear wheels, I thought with my driving style that was pretty darn good.
Melting Slicks
Joined: Sep 2006
Posts: 2,728
Likes: 142
From: Iowa
I'm averaging 24-26mpg on the highway. No idea what it is in town. I was getting about 29mpg with just full exhaust, Halltech Venom, and tuned...before the supercharger install.
Car is an 01 ZO6 with full exhaust and an A&A Vortech v3 at 10lbs. Put down 572/482.
Car is an 01 ZO6 with full exhaust and an A&A Vortech v3 at 10lbs. Put down 572/482.
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Instructor
Joined: Aug 2008
Posts: 147
Likes: 1
From: Nazareth PA
Mods in the Sig. below.
Daily driving my car 120mi a day on the highway the same way before and after the SC, I seem to have lost 2mpg
Not bad but I was told I would gain 1-2
more then happy thou.
Daily driving my car 120mi a day on the highway the same way before and after the SC, I seem to have lost 2mpg
Not bad but I was told I would gain 1-2
more then happy thou.
Last edited by ChargedGN; Feb 13, 2013 at 04:15 PM.
Race Director
Joined: Feb 2008
Posts: 10,926
Likes: 30
From: Not where I want to be!!
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19
I lost a couple MPG on the highway after installing heads, cam etc. on my 04. Probably still getting over 25 MPG on the road.
I don't bother keeping track.
Thread Starter
Burning Brakes
Joined: Oct 2008
Posts: 800
Likes: 12
From: Wichita Kansas
Well those numbers dont seem that bad, I know one guy in my old Corvette club that had similar mods and got like 20mpg but I think he need a tune job badly.
Thank you all for the input! It has been very helpful
Thank you all for the input! It has been very helpful
Race Director
Joined: Apr 2007
Posts: 19,758
Likes: 523
From: Ideals are peaceful...History is violent...St.Charles, MO.
2020 Corvette of the Year Finalist (appearance mods)
C5 of Year Winner (appearance mods) 2019
St. Jude Donor '08-'09-'12 thru'22
I have ported heads,CAI,headers,Corsa exhaust and had a real small cam a few years back and got almost 32 on the Hwy. I changed to EG's Whiplash cam and that shaved off 5 mpg. In town,well it sucks,it's a lopey cam and it's thirsty no matter if you have your foot in it or not. It sure sounds good though
Thread Starter
Burning Brakes
Joined: Oct 2008
Posts: 800
Likes: 12
From: Wichita Kansas