Hello, I haven't been in the forums much lately because I was busy with baseball since last february, and now that it is cold here in cleveland, I only have practice a few times a week(indoors of course) so I'm going to start working on putting an electrolyzer into my "new to me" car. I recently purchased a 2000 Ford Focus ZX3 with 85,000 miles, so it will be the perfect candidate for my dry cell.

I'm obviously going to need to un trick the computer so that I'm not running a rich mixture. I've tried Volo's in the past with some success, but I'm looking for more aggressive gains.

So which EFIE do you recommend?
This one will just adjust both of my O2 sensors
http://www.fuelsaver-mpg.com/digital...l-digital-efie

This one will adjust all of my different sensors and it has a start up delay until the car reaches a certain temperature. I'm not sure if this is necessary because I thought cars start up in open loop anyway. Please correct me if I'm wrong there.
http://www.ebay.com/itm/2012-MODEL-T...08889803920127

It seems like I would see more gains from the Tuning 101 AFR Center, but do you think these gains would be worth the extra $160.

Thank you,
Jim