[Torbjorn968]

Have RS Barn Cams with a reworked cylinderhead and soon RS header + exhaust. The car is mapped using a unichip piggy back solution. Cheap and cost effective it seemed but what is the disadvantage compared to a stand alone system? http://www.civinco.com/index_eng.html

//TL

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[Bognostraclum]

I find this an interesting question.

I'm not sure i understand the difference between "piggy back" and standalone.

Is a piggy back system something that "tricks" the standard ecu, converting sensor values to corresponding stock values, so that the ecu thinks the engines still runs in stock conditions? (I'm sorry for the weird english, but i can't seem to express it better)

Also, what's the difference between all those standalone systems? AEM vs MOTEC vs ...?

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[Cloud9...68]

<!--quoteo(post=78472:date=Aug 23 2009, 05:28 AM:name=Bognostraclum)-->QUOTE (Bognostraclum @ Aug 23 2009, 05:28 AM) <{POST_SNAPBACK}><!--quotec-->I find this an interesting question.

I'm not sure i understand the difference between "piggy back" and standalone.

Is a piggy back system something that "tricks" the standard ecu, converting sensor values to corresponding stock values, so that the ecu thinks the engines still runs in stock conditions? (I'm sorry for the weird english, but i can't seem to express it better)

Also, what's the difference between all those standalone systems? AEM vs MOTEC vs ...?<!--QuoteEnd--><!--QuoteEEnd-->
I'm glad somebody finally asked these questions, because I've been wondering the same thing for a long time myself.

Also, Torbjorn, is the car which has the mods you describe strictly a race car? Thanks.

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[Dubai944]

I have a Haltech Interceptor "piggyback" on my race car. It connects between the sensors and the factory ECU.

Unlike a chip, it doesn't alter the factory ECUs tables but it works by intercepting the sensor signals and modifying them by a percentage according to your tuning requirements which it then sends to the factory ECU. This causes the factory ECU to think the load is different from what it really is and it will select injection and timing parameters froma different point in the factory table. By adjusting the percentage alterations to the signal you can trick the ECU into providing longer injection cycles or more aggresive timing at certain loads and rpm. Requires careful tuning, but works very well for relatively simple mdofications.

A standalone replaces the factory ECU completely and gives you direct control over injection and timing and generally allows you to use a lot more inputs.

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[PorscheDude]

Would love too see some pics and specs of your car Dubai..

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[Dubai944]

<!--quoteo(post=78591:date=Aug 25 2009, 02:04 AM:name=PorscheDude)-->QUOTE (PorscheDude @ Aug 25 2009, 02:04 AM) <{POST_SNAPBACK}><!--quotec-->Would love too see some pics and specs of your car Dubai..<!--QuoteEnd--><!--QuoteEEnd-->

I won't hijack this thread, but I will geet around to posting up some details in the race section soon!

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