Gipper

you could expect 10kw with supporting mods with decent midrange increase. Nothing comparable to the increases you get on a FI car.

Powerfc's are meant to be dynotuned, they come with a basemap which is good enough to run the motor on but will get a lot better performance from fine tuning on a dyno. They also give you the flexibility of not being locked into requiring a unichip dealer to make changes, and the flexibility of revlimit changes and all the other nice features of a fully programable ECU instead of the unichip bandaid solution.

Have a look at the US celica forums to see what the 2zz guys with powerfc's think of them.

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You are right, a fully programmable chip is a better solution when seeking outright power... , but everything has its pros and cons.

The reason i like a piggy back chip is that Toyota spend millions of dollars and thousands of hours gettign things like cold start, idle and closed loop running perfect.

I would be naive to think a tuner could get these things as good as Toyota with a day or tuning.

I just want the air/fuel mixtures changed on Wide open throttle to give me more power and more responsiveness when i hit the accelerator. A pigy back chip does this.

I used to run a Motec in the STi and the gains were awesome! But we could never get it idling or running as smooth as the stock car.

I suppose different chips for idfferent applications.

Thanks for the response though, greatly aprectiated.

for the cost of a unichip, installation and tuning, the powerfc is a better bang-for-buck solution.  The powerfc requires a small amount of thinking to make it work though, which is very simple for anyone familiar with toyota wiring.

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What are the gains like and who did you get to tune it.

I prefer a Dyno tuned solutuion

Hi Guys

ok.. first official post.

Bought a black 03 Stivo a month ago after going from a heavily modified STi.

Small change, but financial responsibility has caught up with me.

Have changed the handling with Koni/whiteline and 17" wheels

also had a LSD installed.

I have ordered a CAI and looking at a magnaflow muffler (If i can find one with sufficient flow but without the drone) to improve power and drivability.

I was wondering what people's experience with a piggyback chip (unichip) with the above mods. With a turbo car the chip has a huge gain with its ability to control boost, but I am not sure with a NA car like the stivo.

In the graph below, it looks like you can get some gains but are they worth the $1000 for the chip. Any real world experience would be great.

http://www.airpowersystems.com.au/unichip/...ota/celica.html

Gipper

My 03 is booked in Friday 17th to get the 1st to 2nd gear change fixed.

Like everyone else, over 7,000 rpm I cant select second gear... although second to third is fine.

If they don't fix it it will keep going back under warranty until it is fixed.

Love having a warranty on the car... love it!