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Old 05-31-2004, 04:30 PM   #1
bluebaru wrx
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Default UTEC valet mode

I've read about the valet mode feature and that it makes the car run real weak...which would subsequently give better gas mileage right? Is it ok to drive regularly on valet mode to save gas?
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Old 05-31-2004, 05:20 PM   #2
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At this point there's nothing you can do to prevent the ECU from targeting an AFR of 14.7:1 in closed loop operation.

The only way to maximize fuel economy is to stay out of boost.

According to my UTEC manual, valet mode is just a way to run conservative timing and limit boost to 7 psi, while using the fuel map from the map in position #1.
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Old 05-31-2004, 05:26 PM   #3
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Thanx..well I guess thats better than running stage two all the time..I have the turbo back exhaust which kinda put a dent in the fuel economy..i figured that if i got the utec i could drive with valet mode on most of the time then crank it up when i feel like it...if that doesnt save gas ill just get rid of the BOV and downpipe.
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Old 06-01-2004, 10:12 AM   #4
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Quote:
Originally posted by bluebaru wrx
i figured that if i got the utec i could drive with valet mode on most of the time then crank it up when i feel like it...if that doesnt save gas ill just get rid of the BOV and downpipe.
Sounds like you should have chose a different car. Maybe a Honda with good mileage.

M
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Old 06-01-2004, 05:30 PM   #5
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I would not use valet mode in an attempt to increase milage. The timing is not optimal for best fuel efficiency.

regards
Pete
(TurboXS)
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Old 06-01-2004, 06:16 PM   #6
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Well what could i do to have and what would be optimal gas mileage while using a utec? Im not trying to whine about gas prices im just about to buy a utec and am wondering these things.
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Old 06-01-2004, 06:29 PM   #7
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i would suggest getting a good tune... under normal driving conditions w/ a good tune at stage 2 I got noticably better milage than stock.. and if I turned the ABC in to peak boost of about 10psi and stayed out of boost on a long trip I could see 30.. of course on the stock stage 2map from TXS that is very rich for safety especially at partial throttle... well gas mileage was not soo good....
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Old 06-01-2004, 06:35 PM   #8
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Oh ok cool thanx thats just what i wanted to hear...i get about 20 mpg right now and thats bearable but i drive alot and dont always want the full power if im just daily driving.
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Old 06-01-2004, 07:26 PM   #9
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according to my own theories, i think its odd your fuel efficiency got worse with a turboback. It should've gotten better, assuming you drive the same.
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Old 06-01-2004, 08:58 PM   #10
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Weird...cause i do drive the same...a few people suggested that it may have been the BOV..but i had it many months before the downpipe and it didnt hurt the mileage...the downpipe is bellmouth..would that have anything to do with it opposed to like a divorced or other type of downpipe?
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Old 06-02-2004, 03:13 PM   #11
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no that woudl'nt have any affect.. the most common thing is your car goes faster so you floor it more often.. and when boost goes up gas goes up too so your mileage goes down down down.. i"m amazed how far down I can push my mileage at an autocross day apparantly 7K in 2nd gear at 17psi just isn't good for mileage.
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Old 06-02-2004, 03:52 PM   #12
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If you want to optimize the tuning parameters for light throttle, you'll need something like an ECUTek reflash. However don't expect a big difference. A better bet is to get some economy-oriented, narrow tires. If you don't have the discipline to keep your foot light, just make a boost map with "1" in every cell.
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Old 06-02-2004, 05:57 PM   #13
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Quote:
Originally posted by MustGoFast
i would suggest getting a good tune... under normal driving conditions w/ a good tune at stage 2 I got noticably better milage than stock.. and if I turned the ABC in to peak boost of about 10psi and stayed out of boost on a long trip I could see 30.. of course on the stock stage 2map from TXS that is very rich for safety especially at partial throttle... well gas mileage was not soo good....
what do you mean the stage 2 map that comes w/ the UTEC is very rich for safety?
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Old 06-02-2004, 06:29 PM   #14
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I mean all maps for the UTEC that TXS gives away (all stages) are made rich (ie more gas than needed) as a rich map is a safe map..

What does this mean... well in a turbo engine excess gas is actually used to cool the cylinder and prevent detonation that can occur if you run to lean. Since all cars are different TXS adds extra fuel to all their base maps in hopes that noone will cook a piston running one. This is also why a large amount of horsepower can be picked up with good custom tuning. So while there base maps may be good there is still often a lot left on the table.
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Old 06-02-2004, 06:48 PM   #15
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ah, i misunderstood, i thought you were saying that it was TOO rich for sustained saftey. clarification is bliss. i was going to get a UTEC in july and that made me start thinking otherwise but i'm back on. thanks.
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Old 06-02-2004, 08:18 PM   #16
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UTEC is very good don't hesitate to get one.. I loooove mine.
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Old 06-03-2004, 05:34 PM   #17
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Quote:
Originally posted by bluebaru wrx
Weird...cause i do drive the same...a few people suggested that it may have been the BOV..but i had it many months before the downpipe and it didnt hurt the mileage...the downpipe is bellmouth..would that have anything to do with it opposed to like a divorced or other type of downpipe?
Yea D/P design or a BOV have ZERO affect on mileage..

How many miles on your car now? Done a tune up lately? New plugs/filters?

I more than 20 mpg on a Stage 4 car FWIW.....
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Old 06-03-2004, 05:57 PM   #18
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9k miles...no tuneup...no plugs or filters...just downpipe and blow off valve..and i rarely drive it hard...usually shift around 3k or 4k.. should i get somekind of tuneup or something? Would the subaru place do that? I definately lost backpressure with the downpipe but i figure the utec will fix that
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Old 06-03-2004, 06:01 PM   #19
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Quote:
Originally posted by bluebaru wrx
9k miles...no tuneup...no plugs or filters...just downpipe and blow off valve..and i rarely drive it hard...usually shift around 3k or 4k.. should i get somekind of tuneup or something? Would the subaru place do that? I definately lost backpressure with the downpipe but i figure the utec will fix that
Nah, 9k is NOTHING

The UTEC cant 'fix' backpressure, as removing the cat in the DP is a great thing to do to uncork the exhaust, and let the motor exhale.
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Old 06-03-2004, 06:22 PM   #20
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Well by fix the backpressure i meant its gonna make the engine run harder so ill have more power that i lost a little of by putting the downpipe on....am i making sense? Im still a little naiive on the ways of the utec i guess...ive read that stage two is +60 hp...i think the backpressure loss would be unnoticable then.. also is this gonna make the car sound significantly different?

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Old 06-04-2004, 01:21 AM   #21
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If you lost power after putting a downpipe on, something is really wrong.
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Old 06-04-2004, 07:53 AM   #22
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No, i gained power, but i notice that around 4 or 5k rpms it does the BWWWAAAAWLLLL sound and the power kinda plateaus instead of the healthy continuous tone and hard pull...but i did gain noticable power... in my previous post i worded it wrong saying taht i lost power but i actually gained power but like i said it plateaus...im not too worried though.. i figure its normal...same thing happened to my friends accord when he put a high flow cat on. just cant wait to get the utec!!!
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Old 06-05-2004, 06:35 PM   #23
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Quote:
Originally posted by bluebaru wrx
Well what could i do to have and what would be optimal gas mileage while using a utec? Im not trying to whine about gas prices im just about to buy a utec and am wondering these things.
My TXS Stage 4+ with the UTEC tuned properly gets 25MPG overall (for over 40K miles now), and 27.3MPG highway. That is an improvement of about 1.5MPG over stock.
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Old 09-20-2004, 04:29 PM   #24
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Just wondering and didnt' wanna start a new thread, what number is the UTEC valet mode on the switch?
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Old 09-20-2004, 10:08 PM   #25
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Quote:
Originally Posted by InfamousDX
Just wondering and didnt' wanna start a new thread, what number is the UTEC valet mode on the switch?
its number 10
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