Slo5oh

Pretext: the car is a highway commuter for me for 200 miles each week, so I want to improve gas mileage. In doing so it would be nice to either gain some power or free some power up.

I was thinking of 3 particular modifications to help gain mpg. I am looking for input from people that have done these as to their oppinions on whether or not it helped mpg and or power.

1. Electric fan
2. Aluminum driveshaft
3. 1.6 Rollers


Also, any other suggestions would be nice. (Im leaving the exhaust alone incase headers came up) It doesnt have to be much of anything drastic, but anything really.

Slo5oh

bump!

mustangsneverdie

delete the p/s pump and a/c the cars not very hard to turn even with the p/s pump gone

Jfsram

Electric fan for sure. Especially when connected to a automatic temp set up.
It must not run when you are cruising on the highway for the full benefit of freeing up power.

The driveshaft is going to be minimal gain. At a constant speed I'd even doubt the difference is even measureable.

Roller rockers would free up some friction, again minor. If the ratio changes and you increase overlap, the mileage will drop.

Slo5oh

pass. drivability and comfort cant be sacrificed.

Project 5.GO!

That's a big +1. go with the electric fan, just make sure you have or get a 130 amp alternator.

U S Marine

Good tires, properly inflated with a good alignment. Oxygen sensors should be considered since they are most important at part throttle cruise speeds. Sounds simple, but over-looked.

I agree with the electric fan mod. Perhaps, some UD pullies, since you should upgrade alternator with an electric fan.

I would invest time/money in the tune up and fine tuning of the car; sensors, air/vac hoses, thermostat, timing etc.. Also, check to see what your TPS voltage is at.

94Blk5.0

One of the biggest factors is how you drive it. Use the cruise control whenever its reasonalby possible. Keep the speed down. As mentioned, a good tune-up (if needed), cap & rotor, wires, plugs, O2 senors, tire pressure, good oil and fluids, etc.

A 5.0 is capable of getting really good mileage.

Also what are the thoughts on multi-spark ignition systems? Summit sells a Crane system that includes the box, harness, and coil for $175. Would that yield any performance/economy gains?

94Yellow50

might not be a huge thing..but light wheels help...we actually just talked about this in my physics class yesterday ...prof. is pretty cool used to be in auto. stuff and hes a physics guy.but yea light wheels require less effort to get rolling..weight reduction would help to...not so much the highway..but the getting up to speed..less weight=less work to get it moving.

HACKGT350

advancing your timing will actually improve your gas mileage too. it spark happens sooner at a more efficient time improving combustion which gives your more power pushing the piston down the cylinder and less effort in acceleration.