Modifications and Gas mileage

[Elliotness]

Just curious.

I have been driving my car for about two weeks now and have noticed that as I drive it the mileage has improved. For those of you that have modified your cars with KN filters and exhuast, have you noticed an appreciable difference in gas mileage? I would think that mileage would get better:shrug: ???

 

[03DOHC]

I have been getting worse mileage as of late. Been running her through the gears more. K&N and exhaust. When I'm in commute mode I've been getting a consistent 19mpg. Not too shabby.

 

[Elliotness]

Not bad. I got 12 mpg on the first tank. I tried to heat cycle the car on the first two tanks. On the third tank I drove the car as I would normally and got 17. Just filled up for the 4th time and ..... TBD.

 

[Fred Brown]

just completed 5700 miles on trip out west mostly interstates lowest 21.7 best but close consistant 24.85.

 

[Fred Brown]

in reguard to the previous my machine is all stock. speed was generally about 70-75 best mi;leage was 85-90 mph

 

[03ShadowCobra]

When I added a chip and pully to my Lightning my gas milage dropped off a cliff. I was getting around 12mpg on average, after mods it went to an all time best of 7.034mpg and a worst of 5.309mpg. The first tank with my Cobra was a much better 13.5mpg.

 

[FlashSVT]

~200 per tank stock, usually opening the intake and exhaust improves MPG

 

[DD2000GT]

I average 14.8 city driving, and just got 19.6 mostly highway driving with this last tank on a completely stock setup. I will do intake and exhaust work and compare.

 

[1Yellow03]

I am getting about 200 to 210 miles per tank! (city driving) I have no mods yet.

 

[coleman]

i've been calculating mine recently.
with 2.80, chip, CAI, and stock exhaust...
i got 14.2, then 13.5, then 14.25, and today (nearly all highway) 20.25...

 

[f4sfed]

With the 2.93 pulley and air filter, my mileage average is up almost 2 mpg. I'm getting about 16 mpg with a half hour highway drive to work, and a hour drive home [they call this rush hour?] in the evening. If I could keep my foot out of it, I'm SURE I could get 18 mpg...but that's not what I bought this car for. :->

 

[Mac03Cobra]

f4sfed, No chip with your 293?

Fred Brown, 24? Is that downhill in Neutral?

 

[03SoCalCobra]

My milage when up noticably after the cat pipe and cat back, then it TANKED with the 2.93 pulley. Before pulley with mods- about 19 on average. Post pulley i'd estimate 16, maybe.

 

[mineral03]

Drove down to southern california yesterday, put about 400 more miles on my car. When i was just cruisin, about 80 mph, without beatin on it, i got an amzing( for me!) 23.6mpg!!! on the next tank, i ended up racin this guy in a volkwagon corrado like 6 times "( sometimes to 140+ mph!), so i only averaged like 20.1... i did get almost 270 miles to the tank though. the only mods i have are the headers and exhaust, and a cold air and filter. Usually, when putting around town, i only get like 15, cause im constantly beatin on it

 

[Elliotness]

It is very difficult to keep this car out of boost. Very easy to get the car into the power band and suck up fuel. I would be very satisfied with about 20 mpg on the road. I think I'll probably get that after the exhaust and KN. What do you guys think???

 

[f4sfed]

Originally posted by Mac03Cobra
f4sfed, No chip with your 293?

Not yet. It [the chip] should be here today or tomorrow. I had it [the car] dyno'd with the pulley and air filter. The fuel curve came right in line.....kind of makes me think that SVT EXPECTS us to make these changes. I posted my dyno in a thread. Do a search for my name, it's in there.

 

[Elliotness]

TTT

 

[Fred Brown]

Mac o3 Cobra in reading my letter, and that of Mineral O3 who also was right up there, 23+ this obviously is not incredible I'm 70 years young and dont beat on the car but i love it for what it is

 

[Mac03Cobra]

Fred Brown, :beer:

If you can get that kind of mileage, you must be doing something right. The best I have been able to get has been 19, and that was cruisin in 6th for most of the time.


f4sfed, Thanks for the feedback...

 

[f4sfed]

Sure!

Here ya go: http://www.svtperformance.com/forums/showthread.php?s=&threadid=19860&highlight=in+spite+of+me