i just got mine....ill put it in sometime this week and ill keep this thread updated....

 

Guys who have SUCCESSFULLY installed these, please explain any mods to Help part along with pictures of location installed. This is critical for the success of everyone prospective of this modification.

Also, were the hondas OBD1 or OBD2 or both?

 

my car is all stock w/ hks hi power exhaust and a custom straight pipe, (o2 bung welded right into the middle of the pipe)

 

Very interesting.... I will try this.

 

You sure put on alot of miles in less than two weeks.

 

did not work at all for me..... the cel came on quicker than without it.... i have a borla exhaust with a guttet oem cat

 

....

 

still working for me at 2k+ mi

 

ive had it on for 200 miles or so and have no cel.....my cel usally comes on after 3 drive cycles before......its been like 20 drives and so far so good....

 

Im going to go buy the help part and get my cat removed, if it fails I will have you make me one..... shouldnt be that hard to do, my bet is, people are probably drilling the hole too big

 

still working.......

 

Glad to hear it's still working... Now will someone make something to cover up the smell? Maybe a Febreze injection nozzle in the tail pipe

 

I just installed a midpipe. Used a single fitting drilled as described in the first post. It took exactly 8.9 miles (2 cycles) of city driving for 3 codes to return and set the CEL.

The codes represent "oxygen sensor stuck lean" and "oxygen sensor slow response" so perhaps it is not getting quite enough "dirty" exhaust flow. I will remove the sensor and open the hole in the fitting up just a bit and continue to try it again.

 

still working......my 8 is my daily driver as well....

 

great for you, sucks for the rest of us.

I drilled mine out to a little over half an inch and tried it again. Took about 11 miles of city driving to light the CEL and give 2 codes this time, both for "slow response" again.

 

i think the hole has to be just right so it gets just a little of the "smog"...if its too small youll get the slow response code...

 

I think as more people try this and we get more results, it will be found that at best, it could be said this works "for some of the rx8s with midpipes, but not for others" and at worst it works "for a few of the rx8s with midpipes, but not for most".

So I tried a 9/16 hole in my fitting and still got the codes. So that means on my car, I have tried fittings with holes of 31/64, 1/2, and 9/16, and NONE of them worked for more than 10 miles before giving "slow response" codes.

So I figured I need more "dirty" air getting to the sensor. However, i cannot drill much more out of my fitting, because I will be getting into the outside threads if I try.

I tried threading the sensor into the bung on the midpipe with no fitting in between, but I did put 2 extra crush washers there to space it out from the pipe about 3/16". I was able to put about 100 miles on it (3 or 4 drive cycles) before the codes returned, and this time it was "inefficient catalyst"...which means TOO MUCH dirty air is getting to the sensor now. I may try it again with another washer, if the sensor will still thread in. Or I may weld on an additional sensor bung, over the existing one in the pipe and go from there.

 

my car is completely stock other than the cat and resonator being removed with 2.5" pipe in its place, put the help part in, and kept it at the same angle as it was in the cat, no code after 70 miles..... car sounds like a rotary now lol.... I used a 1/2" drill bit and it looks like you can barely see a gap in between the sensor and the non-fouler, but I think that is why it works so well....

main reason I did mine is the cat was clogged, and was losing lots of power.... car feels great now, and drives perfect..... just a little raspy with the stock muffler.... may change that later

car is a 2004 in case that makes a difference

 

Did you make this pipe yourself? If so, got any details and/or pics?

 

tried this in my exotic speed exhasut with midpipe, nothing worked, still got the cel

 

still trying variations without luck...

 

still working......ive been on a roadtrip totaling over 1,500 miles...so i guess im good to go...btw i had the op make me one and send it to me....

 

I had the local exhaust wiz do it, he works inside a muffler bros locally, not giving out the location so he doesnt get into any trouble.... but he does really good work.... the pipe just has that slight bend like the cat does, and the 02 sensor is mounted just below the middle of the side of the pipe, exactly how the 02 sensor went into the cat.... I have a spare non fouler if anyone wants it, it looks just like the one I installed....just pay the shipping +$2 for the cost of the part I will get under the car tonight and take a picture of my mid-pipe to show you guys how it looks.....

 

If your cat was clogged, you probably could just have gutted it, no? Then it would still look like a cat (for visual inspections). What happens to the resonator -- does it get destroyed too when gutting a cat?

 

lol sure I could have just gutted... but I dropped the weight by quite a bit removing the cat and resonator.... the only thing the cops look for around here is to see that you have a muffler on the car.... when I had a srt-4 it was hard to explain to the cops that I didnt have a muffler stock...