14 mpg is very low - unless you are having too much fun with it. 
my 2004
Drifting
Joined: Oct 2002
Posts: 1,335
Likes: 76
From: Bedford Va.
maybe, most likely 
need more info on your car and cam sellection.
is it an auto?
what cam are you looking at?
what type of driving are you doing-DD, some track time, both?
we can give you a better answer with more info
need more info on your car and cam sellection.
is it an auto?
what cam are you looking at?
what type of driving are you doing-DD, some track time, both?
we can give you a better answer with more info
Thread Starter
Intermediate
Joined: Mar 2006
Posts: 41
Likes: 0
2004 Z06
I bought the car used from a dealer in Concord NC and the cam was installed by the previous owner. The dealer is trying to find out what kind of cam was installed but I have not heard from him yet. The car runs great and has the lope like an LS-6 would have with a cam. I'm only getting about 14 MPG and it's not that big of a concern to me because I only drive the car for pleasure. I wanted to know if the MPG's where normal for this type setup and if the PCM needed to be adjusted for this or would it compensate on it's own. I just don't want to cause an issue with the engine long term.
Racer
Joined: Jan 2007
Posts: 293
Likes: 0
From: Maryville IL
I would think during normal driving your car would be always trying to achieve 14.7:1 a/f ratio. Reprogramming your computer won't change that. It only changes what happens when you go WOT. 14 mpg sounds awfully low.
Burning Brakes
Joined: Feb 2005
Posts: 752
Likes: 1
From: Tulsa OK
Drifting
Joined: Oct 2002
Posts: 1,335
Likes: 76
From: Bedford Va.
The computer can only do so much on its own.
A tune/verification of the existing setup would be my recommendation.
If your running rich you could destroy the cat's, you will get poor mileage and your giving up power. I am running a cam see sig
not sure about city driving mileage but highway is usually 27-28mpg.
with 3.90 gears. this is typical.
try a seach for a forum tuner in your area or post for a tuner in NC.
hope this helps
congratulations on the purchase
A tune/verification of the existing setup would be my recommendation.
If your running rich you could destroy the cat's, you will get poor mileage and your giving up power. I am running a cam see sig
not sure about city driving mileage but highway is usually 27-28mpg.
with 3.90 gears. this is typical.
try a seach for a forum tuner in your area or post for a tuner in NC.
hope this helps
congratulations on the purchase
Pro
Joined: Sep 2005
Posts: 538
Likes: 9
From: Geneva, IL Bring back the Chief!
St. Jude Donor '06-'07-'08-'09-'10,'13-'14,'19-'20-'21-'22
I only get about 14-17 mpg around town. But i don't drive the thing like an old lady either.Too tempting to feel that torque.
Get high 20's on the highway tho.
Turn on your instant mileage meter and watch it while you drive.
Get high 20's on the highway tho.
Turn on your instant mileage meter and watch it while you drive.
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