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Old 07-30-2003, 03:07 PM   #1
Solomon
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2000 Legacy GT (BE)

Default ECU worth it? Maybe Haltech

What type of gains can one see from a ECU when running a new one? I will be looking at the Haltech for MY00 BE car due to a sport shop in town that tunes them.
What are the main benefits of a upgraded ECU when starting out with a car that just has a CAI, and then Cat back exhaust soon? Like can I get higher RPM's, and more horse power by just tuning the car? And last if anyone has the Haltech, an benefits over the E6 and the E11?
I am just learning about ECU's so I hope these do not sound to dumb.
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Old 07-30-2003, 03:27 PM   #2
dwx
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It all comes down to how it is tuned. Sure you can get more power out of a standalone ECU than a stock ECU if it is tuned well, but if it's not you might be making less power.
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Old 07-30-2003, 04:37 PM   #3
Jaxx
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why don't you just wait for a few months and get a cobb reflash?
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Old 07-30-2003, 07:19 PM   #4
Solomon
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How does a upgraded ECU give a person more HP? I am sure it depends on what is on the car, but can you expect any type of HP gains from just a ECU?
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Old 07-31-2003, 07:51 AM   #5
JoeT
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Solomon,

It's not the ECU that will give you more power. It's the ability of your tuner to extract the most power out of your engine regardless if it's a reprogrammed stock ECU or an Aftermarket ECU.

The stock setup is quite concervative and designed for low octane usage. If you have a really good tuner and access to lots of dough, you can have your car lugged onto a dyno and the timing and fuel maps can be optimized to take advantage of your mods.

The theory is as easy as that. There are simple basic formula's that are used, the more you stray away from the basics depends on how much risk you want to leverage.

Don't expect miracles when replacing the ECU with just a CAI mod. Just like the other person said, unless you have a really good tuner, you can expect to lose lots of power instead of gaining. Specially in the bottom end.

Have fun.
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Old 07-31-2003, 11:56 PM   #6
Solomon
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Well that brings me to asking this again, I am sure I have already. Besides the Haltech, and Autronic is there another ECU that will work with the Legacy that is a piggy back. Kinda like what AEM is putting out soon?
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Old 08-01-2003, 07:18 AM   #7
Paul H
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The Autronic, Haltech E6K and E11 are not piggy back. They are stand alone. However you can set them up to manage your engine functions and let the stock EU manage things like IAC and climate control. Almost all stand alone ECUs can do this. Motec is another company. Go to the ECU comparison thread and take a look there for more options.
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Old 08-01-2003, 08:13 AM   #8
JoeT
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The current AEM offering is also a stand alone. There is no "Piggyback" available as a plug and play option for the Legacy. There's a simple motto to live by, "Do it right the first time, or keep on doing it until you get it right!"

Good luck.
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