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

 

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....

 

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.

 

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.

 

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

 

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

 

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.