Your first mod should be a CAI or Short Ram

[gts24]

I know this question will come up. "What is the best way to get power out of this engine". Best bang for your buck will be a Cold Air Intake or a Short Ram. It may take awhile to get some companies to come out with one though. Reason being. The Intake appears to be at a weird angle in comparison to the Celica. The Celica is straight out, whereas the matrix/vibe goes at an up angle....... So just hang tight and you will have some options!

[BCGT]

I agree that an intake (particularly a CAI) should be the first modification anyone makes in improving the performance of the car, (though it can become redundant with forced inducation).You can expect modest gains of around 5hp or so at the wheels with an intake system. The addition of an exhaust system will further increase these gains, as the two compliment eachother well. A cold air intake system yields greater gains due to its intake of cooler air (and thus air more dense in O2) from outside the engine. Most noticeable will be the change in engine note - deeper and more aggressive at WOT positions. You may also see a marginal increase in fuel economy. Aside from that, it's a very nice addition under the hood of any car. One warning you may here from many people in regard to the choice of a CAI over a short ram intake system is the danger of hydrolocking with a CAI - this claim is overplayed, in my opinon. With common sense and proper caution it is not a danger. Many companies do sell water shields and AEM even has a water bypass valve to reduce the risk. However, keep in mind that the entire inlet of the intake pipe must be completely submerged (that means the whole filter too!) in order for hydrolocking to occur.A few pics of the Injen CAI on my 1ZZ-FE powered Celica GT: http://users.rcn.com/wanless/Intake1.JPG http://users.rcn.com/wanless/Intake2.JPG http://users.rcn.com/wanless/Intake3.JPG Compared to stock: http://users.rcn.com/wanless/Celica0005.jpg gts24 is also correct about the incompatibility of intakes designed for a Celica with the Matirx or Vibe despite sharing common engines, as the throttle body is mounted at a different angle with the intake manifold. Also, the Matrix' and Vibe's battery is where the stock airbox is on a Celica, presenting another issue. I imagine it won't be long before companies like AEM or Injen come out with intake systems though.
[Modified by BCGT, 12:38 AM 4/10/2002]

[gts24]

http://www.newcelica.org/other/dyno/index.htm go ahead and check out the dyno runs on newcelica.org ... this site has so many valuable resources....... learn to use them, you have the 2ZZ-GE engine.... you should see similar results to the Celica GT-S...the engines appear to actually be getting stronger over time as Toyota makes them, so I could honestly see you getting some better stock results,

[mistamatrix]

AEM has a cold air for the 2ZZ only. http://www.aempower.com/application/ind ... cation.htm

[djvash]

I don't know about getting that one... the AEM shows a BIG loss of low end torque.
[Modified by djvash, 7:56 AM 5/8/2002]