cblevy98

might consider tearing down the mustang this winter. and have some questions. my buddy has an 04 cobra with a kenne bell on it making 566 to the ground, and still gets like 22miles per gallon out of it. i understand that the numerically lower gears and 6speed tranny really help with this. but is there a way to build a 302 with aod trans and have respectable power and still get reasonable gas mileage. i think i might have decent starting platform specs in sig.

Tony71502

Make sure your tire pressure is properly set. Even the rears.

What kind of gas mileage do you have now?

cblevy98

not 100% sure as i haven't driven it much. also have a heavy foot i'm thinking its around 12-13 in town, and haven't had it on any long trips yet.

Tony71502

Mine was about 12 before I decided to do something.

After going to the drag strip one time I didn't refill my rear tire pressure(they weren't that low) but that robbed me of a few mpgs. Tire pressure is very important.

I rebuilt my engine and now with just a b-cam, long tubes, and pulleys I get 21.5 Mpg.

That mpg is an approximate number taken from a 900 mile road trip. I was at about 2750 rpm because I was cruising around 80 mph.

If I actually TRY to get better mileage I'm sure I could have.

Tony71502

Btw, where in PA are you?

cblevy98

little south of york pa. i just had a thought. if i check the motor over, and freshen it up a lil, and then look to a turbo with some 3.07 or 3.27 gearing that might get me some better mpg. will still have power when i want it, and get good mileage.

Tony71502

I think the gears would help you with mileage. With an auto I wouldn't go less than 3.55, though.

The maf is going to see that there is a turbo forcing alot more air and then will in turn inject more fuel.

If mileage AND quickness are a concern. You can always look towards weight reduction. Also do things that reduce parasitic drag like electric fan, underdrive pulleys, accessory deletes, alum driveshaft, etc.

But if you have some terrible mileage right now, I would think you may have an issue or two that needs fixed before throwing mods at it. I mean, did exploders have 12-13 mpg? IDK but in a fox that number should go up.

luckythirteen13

that is not true, do not tell people that. they will blow their motor.

the maf will see more air flowing through but the computer is designed to run a 13.5-14.0 afr. when under boost you want a 11.0-11.5 afr, this is necessary to keep the motor from blowing. any time boost is used to make power, a dyno tune is needed.


if you go the turbo route and keep the aod, your going to want to do at the very least, a shift kit (or some type of valve body upgrade) as well as a big tranny cooler (should be the first mod to any aod car).