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Old 04-15-2005, 02:41 AM   #1
hillsboro
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Default unichip

have gpmoto stage 3 kit. catless, cai. unichip, header, etc. will ihave to get my chip tuned constantly? unichip comments welcomed. chip is brand new. car runs rich, just like it did before the chip
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Old 04-15-2005, 01:49 PM   #2
buster
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Your chip should always be tuned for your mods. Unichip is a little more forgiving but to get the most out of your mods for power and safety, get it tuned.
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Old 04-15-2005, 08:58 PM   #3
hillsboro
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Default unichip

Thanks for the reply. I was told that even after being tuned the stock computer will slowly change back to stock. I was also told that was BS. Opinions?
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Old 04-15-2005, 09:45 PM   #4
jaxscuby
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the unichip program will remain.
the stock ecu will try to learn from your driving habits.
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Old 04-16-2005, 07:48 PM   #5
hillsboro
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will the stock computer change the way the car runs even though the unichip is programmed? Which computer has control of the car?
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Old 04-18-2005, 08:35 AM   #6
Rickyh
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The unichip is in control only after a specified throttle percentage/rpm. For example, under 60 % the ecu is in control, after that the unichip takes over. You will not constantly need to get it tuned.
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Old 04-18-2005, 03:38 PM   #7
SlideWRX
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For air/fuel, the stock ecu is trying to keep 14.7:1 whenever it is under 60% throttle and 5000 rpms. Tuning for anything besides 14.7:1 under 60% throttle % 5000 rpm is fairly useless, and the ECU will adjust. That adjustment is a gain that is applied to the whole map. If the ECU has to pull 20% fuel to get 14.7:1 at low throttle, that 20% reduction is applied to the stuff over 60% or 5000 rpm.

Over 60% throttle or 5000 rpm (or both), the ecu is running off of a map; it reads maf voltage, it puts out a specific amount of fuel. if the voltage is higher (how the Unichip works), it outputs more fuel. If it has an adjustment from tuning for 14.7:1, it still applies.

For ignition, The Unichip modify's the crank timing signal. if the unichip advances it 3 degrees, the spark fires three degrees sooner. The Stock ecu uses knock as feedback; it tries to advance timing right up to the edge of knock. So the ingition isn't learned around, so much as just kept from knocking. If the car doesn't knock with the Unichip adjustments, nothing changes.

Once it is tuned for a set of mods, it shouldn't need changing. The unichip deoesn't do boost control, so your boost control may need adjustment from weather conditions.

Tom
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