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Old 02-01-2006, 01:21 AM   #1
EtoS
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Join Date: Dec 2005
Chapter/Region: Tri-State
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08 DGM STi
*RIP* 06 WRX TR

Default Big newb questions on Utec

What exactly is Utec. I understand that it's part of how the engine runs much like the ECU but is there a stock Utec on subarus or is it an aftermarket addon to the car? If there is a stock Utec unit to the car how can I acess it via laptop/computer?
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Old 02-01-2006, 01:52 AM   #2
entropy138
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It is an aftermarket ECU that piggybacks on top of the stock ecu. You litteraly attach it to the stock ecu - plug your wire harness into the UTEC then the UTEC into the stock ECU... Its basically a circuit board w/ a pretty case, processor, some electronic doodads that I know little about and some wires... It allows the car to run on the stock ECU under certain operating conditions - low throttle cruise, decel, ect ect... And it comes online under other operating conditions - part throttle w/ boost, WOT, ect ect...

When its online you have control over fuel injection, timing advace, and boost. You can input the size of your injectors for easy compensation when running larger injectors, as well as some other little goodies like switchable fuel, timing, and boost maps, lauch control and so on.

You connect to it via a lap top and a serial cable. Using hyperterminal in Windows you basically log on and there is an interface in the utec that communicates with the pc.

Hope this gets you started...
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Old 02-01-2006, 03:38 AM   #3
Gethin
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Here's the manual if you are bored

http://www.turboxs.com/downloads/UTE...nual%205.0.doc

If you want to learn to tune (you can modify it with no extra software except PC and hyperterminal) or can make use of it's features it's a great tool. U-TEC so you tune it yourself or take it to a specialist tuner. I don't think the 06 2.5 WRX is supprted though so ask TurboXS.

If you want a more "plug it in and forget" solution look also at ECUTEK and Cobb Accessport. These solutions modify the stock ECU. With the Cobb Accessport you can also custom tune it with extra software yourself. You can search for more information regarding these engine management solutions too.
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Old 02-01-2006, 04:33 PM   #4
EtoS
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*RIP* 06 WRX TR

Default

Thanks for clearing up such things- I originally thought the car came stock with a UTEC that takes over at 60% TPS and didn't know it was an aftermarket piece from the getgo. If I was to get a UTEC, could a dealership know I used one? I know with CoBB AP they can detect flashes. I was at first leaning toward an AP and switching between eco. and 93 octane stock settings as well as anti-theft map but if something goes wrong with the engine/tranny sometime later that really was the cars fault(I know the trans's are a problem and I can already feel my 3rd synchro nugding the dog teeth sometimes- rarely but it happens at least once every other day) and don't wanna get stuck having to pay for a big bill I shouldn't have to cause subaru didn't want these cars to come stock tuned for 93 octane(that 260hp/305tq map makes me droooooool). The other thing is I know I could hookup a Utec to a computer(which I'm eventually gonna put a PC in my car) and would really like to be able to display all the cars info such as boost, temps all over the car, what kind of horse/torque i'm cranking out at what point etc etc.
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Old 02-01-2006, 11:28 PM   #5
entropy138
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Yea dealerships can detect if you've used any sort of engine management that involves reprogramming the stock ecu... Solution - pull the stock ecu completely and instally a Hydra - I'm currently loving the upgrade from the utec I was running .... Then if anything goes wrong you can throw your stock ecu in and go to the dealer (assuming you haven't changed injectors and turbo and all that - which of course you will have by then - hey thats why you're here right? And no you won't be satisfied with 260/305.... none of us are... I was going to be more then satisfied with 300/300 and the stock sti was the reason i sold a near 400-500hp dsm.. so much for hat thought )
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Old 02-02-2006, 12:03 AM   #6
EtoS
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*RIP* 06 WRX TR

Default

What's a Hydra exactly? Also how hard would it be to remove the old ECU? I know the OBD connection is under the steering wheel but where's the ECU itself? Also couldn't I take an ECU out of another WRX and use that to do all my EM or the ECU is married to the car completely?

And trust me 260/305 isn't enough in the long run either but it's nicer then 230/235. I planned to eventually get a catless turbo back and port/polished up pipe along with a K&N Typhoon cold air intake which all together should bring me somewhere along 300/360+ easily. If something in the engine breaks at least I can just take the old exhuast and put it back up. I'm also not 'too' crazy about HP cause I like the twisties alot more then the 1/4 anyway so that's more toward suspension setup and some drivers skill which I'll hopefully get to sooner or later

Last edited by EtoS; 02-02-2006 at 12:08 AM.
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Old 02-02-2006, 12:23 AM   #7
entropy138
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HAHA... a hydra is a standalone ECU that basically controls all the aspects of the car by itself. Visit www.elementtuning.com for more info. The ecu is under the passenger footwell and it takes 1-2 hours to swap in a utec or hydra your first time.. I'm down to about 15 minutes now (not sure if thats good or bad lol)...

Honestly a standalone is quite an advanced engine management solution to jump on and there is a LOT of research that should be done first - both about modding a car and about all aspects of tuning. You could go with a professional tune of either unit (or the other available options ) but it is still a good idea to have a basic understanding of how everything works because there are times when things go sideways and the professional isn't around. I know one person with a hydra that knows nothing about it. I met up with him to see if my laptop would connect up to it so I knew if I needed ot buy a different laptop or connector or whatever. He didn't know how to connect to the hydra, didn't know that it had to be powered up to download maps from it ot a pc... Basically all he could tell me was phil installed it and got it to run right... Personally I'd be scared ****less if I was like that incase anything happend while i'm on the side of the road... But you get the idea - there are people out there who know these things inside and out and people who don't know squat. Either way you have a wonderful resource at your hands so read up.. search... ask questions... ect ect.. I have no car education - everything I've learned has been through this forum and primarily the dsm forums before when I had a 92 Talon... And I've been someone successful in getting my car to run rather well with the Hydra - so if I can do it - anyone can
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Old 02-02-2006, 01:47 AM   #8
Gethin
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Be prepared to pay to play. Dont expect to tinker with your ECU etc and start breaking things then taking it to the dealer, SOA won't be impressed. Trust me, they will know if you've been under the carpet or reflashed the ECU. I waited until my warranty ran out before starting the serious mod path. Catback is fine, but once you go down the Turboback / ECU / Turbo / Injectors etc route dont expect dealer sympathy if you break stuff. IMHO of course.

If you want bling, get an ECUTEK reflash and Deltadash with the DD display.
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