hey guys.. i removed my cat converter and i get lots of power!! maybe next saturday i went on for dyno test also for retuned my piggyback, i let you guys know the result.
one problem though my engine light on is that ok, any suggestion..??

this what i do :
1. i removed the cat converter.
2. i put the o2 sensor with new HF mid pipes with no cat converter

http://www.rx8club.com/showthread.php?t=45983

Don't you want to let your first thread get off the front page before you start a second one?

To Quote Racing Beat http://www.racingbeat.com/FRmazda4.htm

"5. Remove catalytic converter and resonator from the engine completely, and replacing with "cat" replacement tube – max benefit 8 HP – regardless of what muffler is used (or even no muffler)."

Doesn't seem worth the other issues involved in CAT removel for just 8HP. Or are you saying Racing Beat is wrong??

:p I,m very sorry that I make 2 new threads with same topics, Why? because on the other thread my English are so bad it makes everyone who read it struggle just to understand it and it makes me very ashamed of it, I wish I can erased it.
Next time I post new thread I try to write good even if I must open the dictionary, I hope everybody forgive me and once again I'm very sorry especially to Snap-On

:p I,m very sorry that I make 2 new threads with same topics, Why? because on the other thread my English are so bad it makes everyone who read it struggle just to understand it and it makes me very ashamed of it, I wish I can erased it.
Next time I post new thread I try to write good even if I must open the dictionary, I hope everybody forgive me and once again I'm very sorry especially to Snap-On

Dont be ashamed of your ENGLISH skills. I think you are doing a good job. If I where even half as skilled in writingf in another language, I would be very pleased with myself. As it is, I should know English, Tagalog, and Spanish. BUT, what languages do I know? Just one, English. So write on brother, practice makes perfect.

the reason why your CEL came on is that your O2 sensor knows there is no cat. on your car. You need to get a Casper O2 sensor fooler.

You CAN delete your own posts... Just klick "edit" on the post a then "erase"... ;)

Thanks very much guys, very nice of you..!!! "thanks CATALYST, Petrus and Fanman I really appreciated it"
I already install an O2 fooler but engine light still on, maybe I don't installed correctly.
can I get some advice about installing an O2 fooler..???
There is 4 wire in the CAT O2 sensor 2 of them ground (black) and the O2 fooler has only 3 wires, so I little bit confuse

Don't apologize to me..I just wanted to help figure this out and it's easier when it stays in one thread..

What color are the wires on the three wire Lamda fooler?

If you have One black and two whites, the heater and PCM feedback curcuits are sharing a common ground.