Tip for performance enthusiast

[GrandPrix34]

Here's a lesson you MIGHT already know but haven't experience first hand like I am:

 

(+1) Performance : (-2) Gas Milage !!!!!!!!!!!!!

 

My gas milage sux0rs bigtime!!! I have the EGR turned off and no cat with a reprogrammed chip with modified fuel/spark tables and all I can say is this car eats fuel like a fiend!

 

So if you still haven't begun, ask yourself whether you want to be refueling every other day.

 

 

p.s.-of course, a heavy foot doesn't help either

[patgizz]

eh i drive a pickup truck every day and my cadillac on weekends so seeing anything over 15mpg in my lumina makes me a happy camper.

[1badtgp]

You can gt awesome performance and still retain fuel mileage. It just takes a little money and doing the right upgrades. My TGP gets 27mpg regularly is "nicely equiped" in the balls department. Also, we did an n/a 3800 in a freinds GP GT and it pulls nicely while still getting about 25.

[manitcor]

when I had my 3100 boosted I got the same mileage as before the turbo as long as I wasnt a lead foot. When I floored it and got into boost you could almost watch the gas gauge drop though.

 

My 3400 gets the same mileage with the mods ive added then when it had nothing but a pulley on the crank.

 

Its all in the tuning

[Canada]

Duh.

 

Espessically when you turn the EGR off..........why did you do that? Its only on at part throttle.......WFO and idle its OFF.

[manitcor]

Ive never noticed a serious difference in MPG between having the EGR enabled or blocking it off. If anything maybe 1-2mpg.

[Canada]

Sounds about right...............some crazies consider that a lot...............seriously.

 

If you could take a look at your emissions..........you'd notice a higher level of NOx gases.

[manitcor]

of course, thats what it's there for.

 

Ive blocked mine off since I broke a piece off the plenum thanks to not being able to get a right sized bolt for the adapter plate I had made when I dropped in the 3400 (different EGR from the 95) It kept leaking so Ive blocked it off. Once I get my ODBII upgrade done I want to get an 00+ plenum which IMHO has a much better EGR desgin than the pre 00 plenums do.

 

A penny and JBWeld on the plenum and then just cut the egr tube down to the bolt and filled it in with a MIG welder. Its ghetto but it works 8)

[midnight rider]

eh i drive a pickup truck every day and my cadillac on weekends so seeing anything over 15mpg in my lumina makes me a happy camper.

 

 

 

I feel your pain my child for I drive a 78 ford f150 with a 400 v8.....lol

[sonyman87]

i still get 22mph with a heavy foot highway speeds >75mph-90mph

 

well it might actualy be 24-26mph cant be 2 sure b/c of the speedo being off. i only fuel up once a week including a trip from hannibal to st louis and back plus all the round town driving i do every day. i get an easy 300miles per tank or more as much as 400miles in some cases

[maybe2fast]

gutted cat, intake, ffp chip and just took it on a 300 mile road trip to cedar point, over quarter of a tank left, the DIC said I averaged 28 MPG

[Kalgorn]

Completely stock. Lowest I've ever seen was 14mpg and best I've ever seen was 17mpg. Probably around 17-18mpg now that I drive to and from school on a highway. I've got a heavy foot too.

[sonyman87]

eh i drive a pickup truck every day and my cadillac on weekends so seeing anything over 15mpg in my lumina makes me a happy camper.

 

 

 

I feel your pain my child for I drive a 78 ford f150 with a 400 v8.....lol

 

No shit. i drove a 78 chevy scotts dale SB400.. i went from 9mph to 7mph didnt matter where i went. i was making 140 a week from my job and more then half of that went 2 gas! Lol ohh yes twin 14gallon tanks needed those badly