does the milage increase or decrease? what kind of prep work does the engine need for either?
yes im a hp :loser:

decrease...

the factory setup is for maximum MPG.
so any major power adders will need more fuel to perform right.

i am getting about 22mpg.
85% highway (meaning 80mph)

if i slow it down to 60ish my MPG will get up to 25.

so look to get about 200 miles from a full tank of gas.

haha i agree but for the record most people never know what mods give more or less mpg. when they get the mod, they start push it more when they drive...

I've gotten pretty consistent mpg of about 24. When I do alot of extended driving at 80+mph and lots of high speed passing, that number goes down to about 21-22mpg. But normal driving, ie. freeway 65-70, and using short burst of my boost will give me 24. And with normal driving I still have lots of fun!

First tank full after the Blitz SC install was at 26.9 mpg. Lots of in-town driving included.

are you guys 5 speed or manual and would it make a difference that much?

5spds will get the better mpg.

the torque converter in the autos never transfer enough....

are you guys 5 speed or manual and would it make a difference that much?

Mine is a 5 speed manual tranny.

dang that cuts down mpg quite a bit then, my wrx gets 20 on the highway with 18psi and you guys have to stop at 6psi right?

I finished the first full tank of premium since the SC install last week. I drove to work,
35 miles each way. From one side of Atlanta to the other with all the bad downtown traffic
and some open road. I did play around some but mostly drove normal. I have the 5-SP
and had a mixed passenger load. The only other engine mod I have is the AEM CAI
that came with my RS 2.0. I have 215/40/17 Toyo tires. They may be slightly larger than
stock but I not sure. 272 miles indicated on the odometer and 9.2 gallons.

I was amazed to get 29.5 MPG and I don't have the Iridium plugs in yet.

I finished the first full tank of premium since the SC install last week. I drove to work,
35 miles each way. From one side of Atlanta to the other with all the bad downtown traffic
and some open road. I did play around some but mostly drove normal. I have the 5-SP
and had a mixed passenger load. The only other engine mod I have is the AEM CAI
that came with my RS 2.0. I have 215/40/17 Toyo tires. They may be slightly larger than
stock but I not sure. 272 miles indicated on the odometer and 9.2 gallons.

I was amazed to get 29.5 MPG and I don't have the Iridium plugs in yet.

you have the blitz??? what did you have the switch set to? 25% 50%.....?????

My best tank with cruise on in Arizona on a flat road back and forth to work at 70mph was 330 miles to the tank in my sc tc. Seems milage is getting better as time goes on.

you have the blitz??? what did you have the switch set to? 25% 50%.....?????[/quote]

Yah Blitz. I played with it a little, but over half the time it was at Low. I cruise at around 75 mph too. I notice that
even on low it doesn't engage the SC while cruising at a steady speed. Don't get me wrong, on the low setting it
only takes a slight throttle change to activate the SC. Sometimes it annoyingly cycles on and off a lot. I think that
for long trips the High setting will be best. But Low is so much fun when the road allows. I've not taken it over 90
yet. It sure got to 90 quickly.

that explains how you got the good milage.

on the low setting you would need to press the throttle more that 75% to activate the throttle. (not sur if the numbers are right but it think they are close)

i don't have this switch with the PE kit. it runs all the time.

that explains how you got the good milage.

on the low setting you would need to press the throttle more that 75% to activate the throttle. (not sur if the numbers are right but it think they are close)

i don't have this switch with the PE kit. it runs all the time.

The switch is actually the opposite of logic. On the Low setting the SC engages at
25% of throttle travel. That means the SC is on longer. You've got to trust me on that
one I guess, but that is how it works.
On slightly different subject, with the PE you need a blow-off valve right?
On the blitz you don't I assume because as soon as you lift your foot, the SC turns
off and you stop making compression. I'm not sure which would be best. I'm sure that
helps my MPG by not running all the time. I can definitely feel a hit when the SC
engages. It feels like getting a shot of nitrous.


Go figure.

that explains how you got the good milage.

on the low setting you would need to press the throttle more that 75% to activate the throttle. (not sur if the numbers are right but it think they are close)

i don't have this switch with the PE kit. it runs all the time.

The switch is actually the opposite of logic. On the Low setting the SC engages at
25% of throttle travel. That means the SC is on longer. You've got to trust me on that
one I guess, but that is how it works.
On slightly different subject, with the PE you need a blow-off valve right?
On the blitz you don't I assume because as soon as you lift your foot, the SC turns
off and you stop making compression. I'm not sure which would be best. I'm sure that
helps my MPG by not running all the time. I can definitely feel a hit when the SC
engages. It feels like getting a shot of nitrous.

Go figure.

just nitpicking here

soon as you get off the gas the clutch on the s/c compresser turns off :wink:

Mpg is the last thing you should worry about whe adding forced induction. It takes more air and fuel to make more power therefore there is no way your mileage will do anything but go down when you add power.

I built a powerful 1.8T GTI and when I was done it was mean as hell but only got about 18mpg..... lol

I just did 328 miles on my sc tc with pulley upgrades :D If I romp on it allot, I get about 250 to a tank. Not bad for fi :)

that explains how you got the good milage.

on the low setting you would need to press the throttle more that 75% to activate the throttle. (not sur if the numbers are right but it think they are close)

i don't have this switch with the PE kit. it runs all the time.

The switch is actually the opposite of logic. On the Low setting the SC engages at
25% of throttle travel. That means the SC is on longer. You've got to trust me on that
one I guess, but that is how it works.
On slightly different subject, with the PE you need a blow-off valve right?
On the blitz you don't I assume because as soon as you lift your foot, the SC turns
off and you stop making compression. I'm not sure which would be best. I'm sure that
helps my MPG by not running all the time. I can definitely feel a hit when the SC
engages. It feels like getting a shot of nitrous.

Go figure.

just nitpicking here

soon as you get off the gas the clutch on the s/c compresser turns off :wink:


Yes, you are correct

you guys must be talking about 5 speeds. because i only drive 95% city because that is were i live. and watch my RPMs and they dont really go above 2500 and i get an average of 20mpg with my automatic. people told me if i put I/H/E i will get better mileage. i have 17s on my car. so a SC scares me to think of my milage going to 15-16mpgs.

Plasma, I have an auto with a sc and am getting 27 mpg now. Most of my driving is in town also and very rarely get about 45 mph to and from work.

You must need a tune-up or something to be only getting 20 mpg. Thats not good at all.

you guys must be talking about 5 speeds. because i only drive 95% city because that is were i live. and watch my RPMs and they dont really go above 2500 and i get an average of 20mpg with my automatic. people told me if i put I/H/E i will get better mileage. i have 17s on my car. so a SC scares me to think of my milage going to 15-16mpgs.

If your only getting 20 mpg then you got problems. To start with I would reset the
ECU by pulling the ECU fuse from the panel under the dash. Leave it out for 15 minute
or more and then put it back. The auto's are supposed to get better mileage than the
5-sp. Before the SC I checked on every tank of gas and I averaged around 29-31
mpg. I drive mostly highway with an average speed of 75. I always get stuck downtown
in the stop and go but once I get out of the core downtown
area the speeds really pick up. Atlanta traffic is scary fast.

Thought something was weird! They told me at the dealership that I would get better gas milelage to? My car has less than 2k on it. I watched 4 tanks before I stopped watching 205 miles to the tank I am at117 miles and on a half tank now.. So if I remove the fuse what on the ECU what will reset to give me 10 extra MPG? it runs good idles good. But milage is not good. What color is the fuse. Haven't done much digging around so bare with me on this.

When you pop off the cover by your left knee, the cover has a chart on the back
showing the names of all the fuses. I believe it is the second column from the left
and two rows up. It's all by it self I think. There are a lot of automatics in our club
and nobody is reporting mileage as bad as yours. After the reset top off the tank and
track your driving habits. If the mileage doesn't improve take it to a dealer and don't
take No for an answer. Some else may be wrong and they will fix it if you make them.

Mpg is the last thing you should worry about whe adding forced induction. It takes more air and fuel to make more power therefore there is no way your mileage will do anything but go down when you add power...

Seriously.. No joke.

Mpg is the last thing you should worry about whe adding forced induction. It takes more air and fuel to make more power therefore there is no way your mileage will do anything but go down when you add power...

Seriously.. No joke.

If you can't help just go away

20 mpg does sound pretty nasty... however, he did mention that he drives 95% city... even with efficient driving habits, tons of stop and go/waiting for lights/waiting for traffic will murder the mpg... plus adding 17's (likely heavier) with wider tires (likely increased road friction) will hurt the mpg too...

back on topic: in most cases FI=lower mpg...

Mpg is the last thing you should worry about whe adding forced induction. It takes more air and fuel to make more power therefore there is no way your mileage will do anything but go down when you add power...

Seriously.. No joke.

If you can't help just go away

U've got issues/problems if ur "trying" to get better MPG via Forced Induction on ur car. U're giving away false hopes when ur "attempting" to tell people they will get better milage. So, don't tell people to go away Baine when u don't agree with the general rule of thumb when it comes to F/I.

Mpg is the last thing you should worry about whe adding forced induction. It takes more air and fuel to make more power therefore there is no way your mileage will do anything but go down when you add power...

Seriously.. No joke.

If you can't help just go away

U've got issues/problems if ur "trying" to get better MPG via Forced Induction on ur car. U're giving away false hopes when ur "attempting" to tell people they will get better milage. So, don't tell people to go away Baine when u don't agree with the general rule of thumb when it comes to F/I.

This forum doesn't need punks like you that have nothing to contribute. If you had
an facts or data to add to the discussion, I would hope you would help people. But
no, all you can do is add "Seriously.. No joke". The other guy was at least able to
form a complete sentence. Now I’m not trying to blow smoke up somebody’s a$$
here that a supercharger will give you better mileage. I’m just saying that mine has
remained the about the same. From talking to Hip_2b_SQR, I think his stayed close
to the same. There is only 1 other xb owner and 1 tc owner that list a supercharger
on their Scion that have contributed to this topic. That’s not a very big sample, but I
would put more faith in our results than someone whose avatar still says “future owner”.
As to auto vs. 5-sp, even Scion claims the Auto to get 1 mpg better than the 5-sp.
What I would like you to do is contribute useful information and not pass along hollow
Statements. Your not helping, your slapping someone in the face and calling them stupid
because they asked a question. People will stop posting if all they get is sarcasm in
return.
The question that I have yet to get answered by any of the pro’s I’ve consulted is
“Does a forced induction engine use it’s fuel more efficiently than a normally
aspirated engine?” Yah, I know “more air needs more fuel” but more horsepower means
less effort is needed to achieve the same goal. There must be a balance point there
somewhere. If my driving habits change to that of Speed Racer and all I do is speed
around every day as fast I can, of course the mileage will go down. The big “what if”
is when I drive the same.

So again, Either contribute or go away.

Thanks

^ :rofl: :rofl: :rofl:
Fact is F/I eats up more gas.

That's why turbo diesels get better mileage than NA diesels?

Diesel Big Rigs ur talking about... I'm talking about cars. Stop trying to blow gas up peoples a$$.
Simple Q & A (for baine): Do u get better or worse mpg with ur sc ("almost" doesn't qualify as an answer)?

As stated above, I'm getting the same as I was before. That is why I question the
blanket statement "more air means more fuel". It simply isn't that cut and dried.
The diesel I'm referring to is my old diesel Rabbit vs. my fathers old turbo diesel Jetta.
They both have the same engine with the exception of the turbo. He regularly got five
mpg better than I did. Why?
It's pointless to continue this discussion if you are only doing so to defend your ego.
If you have some data (other than the blanket statement above), please share. I really
do care what you have to say if you have something worth saying. So, will you rise
to the challenge?

First of all, i highly doubt ur getting the exact mpg u were before u installed f/i (but ur egos on the line so say what u gotta) :eyebrow:
When running a Turbo, ur literally forcing more air into the combustion chamber, therefore fuel is a key factor in balancing the equation. If combustion becomes too lean (meaning a lack of fuel) for proper combustion, too much air is being forced into the chamber causing a car to boggle at the same time increasing the chances of blowing ur engine. In order to balance the air fuel ratio, more fuel will be needed to compensate, hence more fuel (in a lot of cases an additional fuel pump compensates for this lack of fuel). On the same token too much fuel can also be a bad thing, but in general its better to run rich rather than lean. My point is, if more air is being in forced into combustion, additional fuel is essential for optimum performance. If u’ve driven a turbo without enough fuel, than u’d know its like driving with a car that has the hiccups… And if u've installed f/i and don't ever boost, wtf did u buy it for (pardon my french)? Even if u wanted to boost u'd be boggling down the road never reaching ur rides potential <In my book, thats a waste.

I understand your point. And if I was under boost 100% of the time then there is no doubt I would use more fuel.
But the Blitz system uses the stock injectors and fuel pump. I'm only under boost while accelerating and not
while I'm just maintaining speed. Don’t get me wrong it is on a hair trigger and that bothers me a bit. I just bump
the throttle and I’m right back in boost. It makes speed control a little challenging. Look I’m 39 years old and
I lost that ego thing years ago. I don’t need it. So far I have only four tanks of gas as a sample. The jury is out
until we have more data. I will spend the next tank racing around and doing jackrabbit starts and I will post the
results. But I can tell you that even stock my mileage would tank when I drove that way. Since I bought the
car I have checked the mileage on every fill-up. I don’t see this habit changing any in the near future.

Regards

Here is an update on my mpg. I have spent the last two tanks of gas zipping about
with no regard to fuel efficiency. I have been racing away from traffic lights and
speeding around Atlanta as if I'm on fire and being chased by Ninja, who are also on
fire. The end result is just what I would have gotten pre-supercharger. I got 26 mpg
and 27 mpg on those two tanks of gas. So far everything except the fun is the same.

Here is an update on my mpg. I have spent the last two tanks of gas zipping about
with no regard to fuel efficiency. I have been racing away from traffic lights and
speeding around Atlanta as if I'm on fire and being chased by Ninja, who are also on
fire. The end result is just what I would have gotten pre-supercharger. I got 26 mpg
and 27 mpg on those two tanks of gas. So far everything except the fun is the same.

Actual xB milage Scion posts are:
Manual: 30/33
Auto: 30/34
^But u should already know that...
If ur gonna post, be honest, be real...
I won't reply to ur post simply hoping u'll be respectable & state the actual mpg pre-post fixup.


R2D2

I'm not exactly certain what you where trying to say in the PM above. I will take a shot in the dark
that you think I'm lying about my mileage. As to the Facts regarding Dealer SUGGESTED
mileage, I can only conclude that you think Scions actually get that kind of fuel efficiency. Have
you ever looked outside you obviously narrow minded little world to read the post about xB's not
coming very close to the advertised mileage. Do a search and save the rest of us the annoyance
of your opinion. Yes a few people have gotten around 34 mpg (auto's mostly), but most are getting
significantly less than that. Some as low as 20 mpg. God knows how they drive to get mileage that
bad. An xB if driven calmly seems to get about 29-32 mpg average. If everyday is driven like a day
at the track then the mileage drops sharply. If I drove crazy before, I got 26-27 mpg. If I drive easy
then a usually got 29-30 mpg. The best I ever got was 33 mpg on a long slow trip through the mountains.
I rarely got over 50 mph for 250 miles.
A question was asked regarding Turbo/Super mileage. I responded with MY experience. How would
lying about that help me. I don't need to be respected by some low class punk whose big mods
listed on his profile are his "Antenna, Pedals, Shiftknob, Tint, and Bulbs". I get my respect from the
Scionlife and Scinergy members who stand beside me when we show our cars. These people are
worthy of my respect and I value their opinion. I will continue to post my mileage as it is what it is.
If you wish to continue hassling my for this I guess that's just fine. Although I have never understood
why some people will go to such great lengths to prove their shortcomings.

I don't need to be respected by some low class punk whose big mods
listed on his profile are his "Antenna, Pedals, Shiftknob, Tint, and Bulbs". I get my respect from the
Scionlife and Scinergy members who stand beside me when we show our cars. These people are
worthy of my respect and I value their opinion. I will continue to post my mileage as it is what it is.
If you wish to continue hassling my for this I guess that's just fine. Although I have never understood
why some people will go to such great lengths to prove their shortcomings.

Just by the way ur speaking u sound exactly like what u "attempted" to proclaim i was. I won't stoop to ur level, even if u continue to "try" and bash me. Its only hot air - if a person needs to resort to insults to prove their point.
And for the record, I don't consider my car modded (including the mods "you" left out).. To me, its still classified as stock.

Havent seen anything that officially breaks the rules however there are several individuals who seem to want to put thier toes as close to the line as possible. To help avoid any wanrings and ugliness, I'm going to close this thread down and hope to all get out cooler heads prevail.

Different boats for different folks.