I was talking to my son this afternoon, we were discussing mpg's in the 06.
What would you do for max mpg's out of the 05+ gt's
I was thinking 273 rear gears, cold air intake with a tuner, shorter thinner tires, remove rear spoiler and louvers, remove the side view Mirrors, block off part of my roush front bumper,

What would be some of your suggestions? I dobt I would ever go for it but I bet we could get over 30mpg where I am only getting 22mpg right now.

 

Glen your on to a good topic, but the 273s would actually harm you milage, unless you could start your run at 45 mph. you need gear to have power to start the car rolling. I believe the 3:30s tha GT autos are running actually hurts my milage. 355 or 373 would be better ofr daily city driving, and the 330s are better on the highway.

 

Lose weight. Light on the pedal. Avoid traffic.

 

I get 19 city and 28 highway with my supercharger setup, you can try that...Paxton 2200 with gt500 fuel pumps and custom dyno tune

 

2.73s will not hurt your mileage.
They will slow your 0-60 time by a half second probably.
I ran 2.41s on my last car (beat that).
As long as you have plenty of torque, you will be fine.
The mustang has 320+lb/ft
I was running 350 lb/ft + in a very heavy car.
Your top end will be outrageous.
I was getting 17mpg with a 455ci engine in a very heavy car.
I'll bet 2.73s and a CAI would be all you need to get 30mpg at 60mph.

 

28 HWY and 400+ ponies sounds like sound economic advice

 

Steeda underdrive pulleys should help. Cruise on the highway instead of the stop and go city driving if you have a choice. Cut out as much weight as possible. Remove what is not needed and replace hood and trunk lid with carbon fiber parts. SHR claims that the Legend front splitter will improve aerodynamics and increase fuel economy.

Then it's just common sense driving. Don't accelerate fast and slow down when approaching red lights. Coast whenever possible and use the cruise control on the highway. Make sure the tires are properly inflated.

 

I thought my mpg would suffer after the suprcharger but it acutally improved

 

If you want the best mileage turn your engine off when you can instead of idling, say in drive-throughs, train crossings, etc. V8's use quite a bit more fuel while standing still than 4 bangers. Highway mileage is actually pretty decent in these cars if speeds are kept around 60mph.

 

The five factors which absorb energy in your car are:
1.) Rolling Resistance
2.) Gravity
3.) Wind Resistance
4.) Pumping Horsepower
5.) Frictional Losses
To increase your mileage:
1.) You can reduce your Rolling Resistance by inflating your tires to the maximum allowed cold pressure.
2.) Remove weight that you don't need in your car for that day.
3.) Don't exceed the speed limit.
4.) A Supercharger can theoretically recapture some of your pumping horsepower. This would be more gain if you commonly travel over mountain ranges, where the gas pressures can actually do some productive work.
5.) Frictional losses are pretty low on these cars to begin with. The recommended 5W-20 oil will improve your mileage slightly over 5W-30, 5W-40 and 5W-50 oils (like 0.1 MPG). You could also get a lower base number oil, such as a 0W-20, for another very slight gain (+0.1 MPG).
By running premium fuel, you will guarantee that your timing won't retard to prevent knock, plus you can shift into higher gears sooner. With a 20 cent differential between regular and ethyl, the break-even point on this is about $6.00 per gallon.

Please do not remove your rear view mirrors. The slight gain in economy would not offset increasing the chance of an accident. As far as spoilers are concerned, for every ten pounds of downforce, you have ten pounds of drag. Wings, on the other hand, have only one pound of drag for every ten pounds of downforce (if designed correctly). A typical spoiler will have about 25 pounds of drag at 60 MPH, and go up with the cube of the speed.

A front splitter, if designed well, can help reduce wind drag. Variations of forward air dams can be equally beneficial, as far as drag is concerned.

Cold air intakes with a custom tune generally are great for more power, but I am doubtful that you would actually gain light-load fuel economy with one.

 

i have a o7 gt/cs...3.31 stick shift.before i added anything to the car i got 20-22 mpgs in town and 28-31 on the hwy.no bs.you simply have to learn to shift early 16-1700 rpms and drive with a light foot.also set the cruise and keep it at or under 70 mph.


it is very hard to get good mileage like that,because i get grandma in her civic passing me.

 

The car can get 32mpg cruising at 45mph on a level surface...but that's SLOW

 

In my 2000, city driving I got 16mpg, after I added a CAI, I got 19. The more access to fresh air the car has, the less it has to strain to get to it, (at least that's what I was told) resulting in better mpgs.

 

good stuff! I was talking about taking driving habits out of the equation and wanted to look at mechanical things we could do. I wouldn't remove the rear view mirrors maybe get smaller ones. It just some hypothetical ideas to throw around.
If your getting 20 mpg's what can you do to improve mpg's with out changing driving habits.
Would shorter tires make it better or worse? I would think it would improve things a bit.
How much weight diff is there from our stock hood to a carbon fiber one.

 

shorter tires? No
Narrower tires yes, smaller patch of rolling resistance. i went from 235/55/17 to 275/40/19s and lost 1 mpg. After the car show season, the factorys go back on!

 

the 275/19 tires are taller than your 235/17 by about 1/2 inch and 1.5 wider. I would think shorter tires would give you more tq?

 

How unreasonable/difficult/expensive is it to change the ratio for 5th gear? I mean, you can still have the same pick up and all from 1st through 4th, but when you put it in 5th gear, it's truly an OD (something like 80mph at 1800rpms).

 

I have always noticed when shifting from 4th to 5th at WOT the car seems sluggish...

 

How are you guys pulling down these numbers? My '05 has 3.55s w/a 93 Brenspeed tune and Steeda CAI and I'm getting 16.3 mpg.

 

Also dont fill the tank. I always run about 1/3 of a tank at the most unless i am going on a road trip. it saves weight also.

I think bamachips is offering some economy tunes now as well.