Disabling the 2 rear O2 sensors is commonly done with cars using offroad x or h pipes. Many of these units still have bungs to receive the front 2 sensors - although often with the need for an extension harness ($29 or so each). I don't think you get any performance advantage on late model cars by totally bypassing all 4 sensors - in fact, my suspicion is that it might result in less driveability/fuel economy/etc.
Lots of Diablo and SCT owners go to o/r pipes, but most the guys I know kept the front 2 sensors and disabled the back 2. (I live in an inspection required area, so I'll be keeping the cats and front 2 sensors on my 02 GT).
As for the rev limiter, leave it alone or reduce the number. Same with the top speed setting, unless you upgrade your tires (factory setting is based on the speed rating of your tires). If you plan to run over 150mph or so (usually a ZR tire rating), tires will be just one of the items you'll be changing, of course...
tripleblack
Quote:
|
Originally Posted by carguy1985 i was curious too about disabling EGR what performance would that give you or hurt you. |
Timing, WOT Fuel Question 
