First off let me state.... I used the search feature on your site to find the answer - no luck. I tried to figure out which catagory it would be in... no luck... forgive me if it exists and I didn't find it... but hey, this is my first post to this forum.

And now for something completely different....



I have read a ton of threads about how people are boasting the 0-60, the top speed, the sound, the lighting, etc... nothing about boasting the mpg. Is it a doable mod for a realistic price? What would it take and how much (roughly) would it set you back, and for mow much gain? Is there a series of mods which work best?

 

Um.

I have gotten 37 mpg on trips. I usually get 29-30 mpg. I am more than happy with that, and I would not want to sacrifice performance or my time or money to bump my mileage. The mileage is a number that you can't show off like a nice paint job or stereo, as such, it's not one which (most) people feel is worth their time to try to boost.

Besides, wouldn't an xA be a more logical starting vehicle... same drivetrain and much more aerodynamic.

With that being said, superlight wheels, CAI, underdrive pulleys, and changing the gearing should all help.

 

If gas prices go up much more, it will be the single best thing about these cars. You will soon be bragging about your gas milage.

 

I know it's a great characteristic, but you don't see people putting vinyls on their cars reading "34mpg Highway" now do you?

 

<cheap shot>

Ya... like that's difficult!

</cheap shot>

 

Yet!

Just because you can't see the improvement doesn't mean it's not a mod worth doing. There is a thread on this site about a guy who bumped his prius up to 80mpg. I know that isn't going to happen on a scion, but am interested in seeing what it takes to sqeeze out a little more from each gallon.

Do any of the performance accessories, if driven right, will boast the mpg? Maybe a new exhaust or air intake? Better air filter setup? If it allows the engine to run easier - it should also boast mpg or am I way off on this?

 

You have the right idea.

I know my CAI helped. I think my exhaust helped. Not sure about my lighter wheels since it got real hot right when I got them and I run the A/C all the time.

NOS will not help.

 

I hadn't considered the effects of running the a/c....

In my truck with the 5.3 V8, it doesn't even notice whether the a/c is on or not. Tons of power without any noticable dip in mpg... but I didn't get it for the mpg... that's what the XB is for.

Is it like the econo cars from the 70's, where you could feel the power hit when you put on the a/c in the XB?

 

Let's put it this way....
You know how when you're driving down the road a little faster than you should be and all of a sudden, you see a cop doing radar....and you don't want to hit your brakes because he'll see the brakelights? Well, with the xB, all you have to do is turn on the A/C!!! Instant 5 MPH drop with no brakelights!

j/k it's not that bad.

 

I brag about the milage al the time, all my freinds have guzzlers. I just checked it again yesterday and got another 37... not bad for almost all highway driven. My secret... draft the semi's. Less air against the front of the XB the better the car moves down the road. Many times I'm off the gas more than on it. I do wish there was a way to re-gear these things, I would love to get the rpm's down on the highway a little. I see larger diameter tires in my future, it'll help on highway milage for as much as I drive.

 

I love hearing my coworkers complain about gas. They drive big trucks and one guy has a H2. Seriously, they complain every day, I love it.

I keep my distance from whe semis... they kick up too much road debris.

 

For best mpg, keep it stock and drive it slow.

 

gas prices= booooooooo

 

was getting 27 in city, then did mod for Ground Wire kit.
Now getting 30 city on a regular basis.
If I keep it 75 or under on the hwy can get up to 37.
Trying something I read about Acetone. 2 oz per 10 gal. Been using it past 4 weeks and slowly uping now at 3 oz. My city driving is just past 31 mpg now and the bum-meter says its performing better.

 

Wrong! (kinda )

We have one of these on my wife's Civic

http://www.cafepress.com/mpgstickers

 

what's funny is the xB's get better gas mileage on the highway with the air conditioner on and the windows up. The air coming in the windows drags the car down. I get 4 mpg better with the a/c on. problem is i like having the windows down. lol

btw.. i get 39 on the highway (I drive normal) and 32 in town.

 

I would like to mod the engine DOWNward in displacement. JDM bBs have 1.3L standard

Prius is a didferent engine I guess, but it's 1.1L and this greatly aids highway milage

WHY? because an aero car on level road only needs maybe 8 to 10HP to run along at 60MPH.

Now, the greater the excess displacement , the less efficiently the engine runs and so more gasoline is burned without useful work function.

For "ideal" milage from an xB we'd have an impossible hypothetical: To get best milage on, say, a level road at sixty, let us have a 20HP engine operating at its -peak torque- value. And if this were the case, perhaps this engine would be, say, of .5L (just making up a number).

And in this way you might well obtain 50+ mpg from an xB at 60mph.
And get similarly excellent mpg in city driving but you won't be keeping up
but like as if you were in a Model T (can be done, I used to drive a T exclusively in traffic)

You would not be equipped, however, to pass semi or pull fast over mountains.

 

heheheheh... a .5L xB would even have to struggle to get up my driveway (1/3 mile that's second geer in my automatic xB), SciFly.

(And that's why the Prius has big batteries and a gas engine - so they can both pump out power when the going gets tough.)

The hilly country 'round me is why I get less MPG than many others do with THEIR xB's.

Of course in Florida, isn't the tallest mountain Space Mountain at 175 feet, or something like that?

 

I could see where the windows open could act as a huge parachute - putting a lot of drag on the car.

Would a ram air set up with a throttle body spacer put more air into the mix, boasting the horsepower allowing the engine to maintain the higher speed with less effort?

 

I get SUPER good gas miliage. all I do is once a week drive around and find another scion and take the gas out from thier tank. See most scion owners dont have locking gas caps, so they are easy targets.


LOL! hahhahaha, just jerking ya guys... the scion gets pretty good gas miliage I love it.

The big question is now, I bet all you are going to go get a locking gas cap now. LOL