UTEC basics

[fatray]

Originally Posted by SolidSnake

My question is will the UTEC give me any better gas mileage? If it does cool and I can use it as an excuse to tell the wifey I am getting it.

-I have a 04' STi, with a TB exhaust, intake, and BOV.

Well the UTEC is supposed to give you more HP. If you get more HP you will get less MPG. That energy has to come from somewhere, that somewhere is gas.

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[CarWidow]

disconcur... depending on what map you use, alot of the maps use a more efficient a/f ratio... the cars run pig rich from the factory. i think that will save you some gas mlg.

[cellobro]

OMG, even years later, this thread ROCKS. WRX Hackers & Nasioc have TONS of info. Lemme get to reading...

[cdvma]

Originally Posted by sooshimon

So I've read the Manual about 24 times and been through the forums.

My problem: Uploading maps onto the UTEC. Yes, I am doing transfer -> send text file, pressing enter before i do it and all that. As I try to upload, it'll stop at about 10% and say Checksum Error File Corrupt. I have Version 4.2c

Any other ideas other than the ones already posted on this thread?

http://forums.nasioc.com/forums/showthread.php?t=872292

[steve]

wrong topic.

[Bbasso]

Originally Posted by fatray

If you get more HP you will get less MPG. That energy has to come from somewhere, that somewhere is gas.

I need to disagree.

If you keep the weight of the car the same but increase the power of it then the car will have an easier time getting to and keeping speed. I know this because over time I have increased my power while reducing weight and the MPG went up each time I did more inprovements on the ITR (WRX is still stock).

There is a point where you can have too much power and it will decrease the MPG such as a 600+ whp setup in just about anything. But for reality sakes... any of the current day cars most stock or midly modded, we are not going past that point. So increasing MPG while gaining power power is common.

Of Course this is providng the tune of the complete car is on point.

[Davenow]

Originally Posted by fatray

Well the UTEC is supposed to give you more HP. If you get more HP you will get less MPG. That energy has to come from somewhere, that somewhere is gas.

You wanna bet on that? WHile that is usually true, its very often not.

I got 50+ more miles out of a tank of gas at 309whp stage 4 than I did at stock/stage1/2/3, and I know a LOT of stage 4 wrx guys that got better gas milage at stage 4 than they did stock.

My STI also picked up 20+ miles per tank when I went from stock to stage2. And another 20 miles when I added the alcohol injection.


It is entirely possible to make a motor more efficient, and gain power while not losing mpg..

[Davenow]

Originally Posted by sooshimon

So I've read the Manual about 24 times and been through the forums.

My problem: Uploading maps onto the UTEC. Yes, I am doing transfer -> send text file, pressing enter before i do it and all that. As I try to upload, it'll stop at about 10% and say Checksum Error File Corrupt. I have Version 4.2c

Any other ideas other than the ones already posted on this thread?

You saved the maps in word or notepad or something. Or someone did. That will cause that specific error every time.

[Freon]

A UTEC should have little to no effect on gas mileage when cruising around town, since the UTEC won't be controlling anything.

Gas consumption while beating on your car is pretty irrelevent, IMHO, but in general your power output is going to be closely tied to gas consumption.

The rest is anecdotal and poorly acquired data.

[kcook]

this is a real simple question, but i have the Rev6b utec and i installed it today with the abc. my maps were pre loaded into my utec so i didnt use the laptop to do anything for the install today. my abc is open 3 turns and im hitting 16ish psi by my boost gauge reading. anyway, does the red light in the middle of the utec come on all the time or only when the serial cable is hooked up with a laptop?

[CarWidow]

i believe that is on all the time, however, mine is always under my floorboard so i can't really remember? free bump for others to see

[Lost_Pete]

The red LED is on whenever power is applied to the UTEC. Note that turning off the key does not immediately turn off the power to the ECU and the UTEC.

regards
Pete

[forced4]

n00b question: I bought a used UTEC recently. How do I figure out what software rev is currently loaded? I assume I need to hook it up to a computer? I was hoping for a visual clue.

[CarWidow]

might be easier to get the number off it and contact turbo xs to find out...

[Gethin]

If it's used then the only way to know is to hook it up to a computer and run Hyperterminal, it will show up on the dashboard screen. TurboXS won't keep a record of who's upgraded the firmware

[forced4]

Thanks

[CarWidow]

^^^ good point

<--- in the slow group today

[forced4]

One more n00b question: How do I check what hardware revision the UTEC is?

[CarWidow]

i thought that one was printed right on the back of the unit????

[forced4]

Originally Posted by CarWidow

i thought that one was printed right on the back of the unit????

Found it under a removable cover.

[CarWidow]

sweet

[Blind_man]

ANother Newb question:

Just had an offer to purchase a UTEC ver 2. What is version 2? How many versions are there? and which versions do people prefer?

[LIQUIDSK8S]

subscribes

[Lost_Pete]

Have a look at this thread;

http://forums.nasioc.com/forums/showthread.php?t=626740

regards
Pete

[WrxRick]

so you cant just plug and play the UTEC like an Accessport? Does it use the same port under the dash?