Cattman headers + O2 simulator result

[froedrick]

Hey, paisano--you're doing OK!

[m_turner_02]

yea, I agree. You are speaking better English than half of the new guys on here that type with butchered spelling and ridiculous slang. Keep us updated.

[civichatch9one]

i get it... it was an option when i did mine... i know its not the same. but the o2 sims gave the option to ether tap into the secondaries and have it send a signal to the computer that way. where the sensors are still in the pipe.
OR
just remove the sensors all together and just connect the chip to the wires. and what luiggie is saying is just do that and zip tie it out of the way.so its not hanging

[Ampli]

Thanks for the infos!!!

[m_turner_02]

any update on this??

still no CEL??

[05REDSER05]

+1 i'm waiting for everyone else to do the testing and dirty work before i invest in mine

[LuiggieSE-R]

UPDATE!!!
Day 11 = No SES, O2 Sims are working fine!!

[m_turner_02]

^^cool, thanks. done any dyno runs yet?

[LuiggieSE-R]

Originally Posted by m_turner_02

^^cool, thanks. done any dyno runs yet?

Not yet because I need to change Clutch master cylinder + slave cylinder but the order is on the way, so I hope that I will do some dyno maybe by the end of next week.

[steveracinRR]

i've never been a big exhaust techie, so when i read these threads i get very flustered..lol

I kinda wish brian made a thread explaining everything a lil better. I dont know what cats to get or not to get or if i get a y-pipe also if that needs cats..just so lost to the point i wont get any of it.

[DankzvillezSER]

Originally Posted by steveracinRR

i've never been a big exhaust techie, so when i read these threads i get very flustered..lol

I kinda wish brian made a thread explaining everything a lil better. I dont know what cats to get or not to get or if i get a y-pipe also if that needs cats..just so lost to the point i wont get any of it.

you should call Brian he is a very detailed guy to talk to excellent guy!!! he will explain it to you in ways you would want and answer EVERYTHING for you!

[MF DOOM]

Originally Posted by steveracinRR

i've never been a big exhaust techie, so when i read these threads i get very flustered..lol

I kinda wish brian made a thread explaining everything a lil better. I dont know what cats to get or not to get or if i get a y-pipe also if that needs cats..just so lost to the point i wont get any of it.

if you find any info out, let me know! i'm in the same boat as you

[Ampli]

Originally Posted by LuiggieSE-R

UPDATE!!!
Day 11 = No SES, O2 Sims are working fine!!

Is there any 'how to' with pics for the installation of the O2 sims with theses headers??

I know it's suppose to be easy, but i want to be sure what i'm doing, to do it right and do it once!

I have the cattman headers + catless racingline y-pipe...

THANKS!

[Cattman]

Originally Posted by TUKO316

how exactly did he solve the problem. i heard different things im so confused. is it the metal he used or the way he angled the 02 sensors?

im guessing 02 sims would work on the secondaries on my hotshots if i removed the cat but what about the primaries? i want to know what he did so i could try it out. if it dont work then atleast i tried.

Try looking at this a little differently. There was something about the design of the Hotshot headers that triggered a CEL from the primary O2 sensors. The Cattman headers don't do it, but I honestly can't tell you exactly why ours don't and the Hotshots do. We just followed good design practices and didn't - just like all Cattman exhaust parts - make cost-saving compromises that diminish performance and durability. There are a number of features in the Hotshot design that are done differently than the way we make headers, and I can only assume that some combination of those factors is responsible for the seemingly unresolvable (no 100% confidence solution) CEL issue.

But most relevant to your questions, the processes that Cattman header owners are following to keep their ECUs happy (for off-road use only, of course) are the same ones you'd use for any header set (that eliminates a pre-cat) in just about all modern vehicles. There's nothing about this "simulator vs relocated O2 ports behind a main cat in the y-pipe" discussion that is specific to Cattman headers, Altimas, or Nissans, for that matter. These are the methods you'd follow with most header installations in late-model vehicles.

The unknown factor that prompted much of this discussion was the choice between two methods for causing the ECU to "think" that the pre-cats are still in position. The already proven method involves including a high performance cat in the y-pipe, and putting dual O2 ports behind it as a new home for the secondary sensors (the method used with our prototype testing last year).

The other possibility was using O2 simulators as some choose to do on pre-05 Nissans when they install headers. However, it wasn't known if O2 simulators (that we DO NOT sell) would function properly in 05+ Altimas/Maximas, due to Nissan changing the primary sensor technology that year, which has resulted in some incompatabilities in different situations. Since we used the "cat + dual O2" solution in the prototype car, the simulator option wasn't checked out until the first production batch of headers hit the streets. Perhaps that question has been answered in this thread.

I hope this is a useful clarification and hasn't made things more confusing.

Brian

[TUKO316]

maybe I have to understand why the cel light goes off to begin with. I was under the impression that the front o2 sensors were causing the cel to be triggered. If thats the case then thats what I want to figure out i.e would it be possible to get rid of the cel light by relocating the front o2 sensors?

I have a catalytic converter and my cel light is on. I know (or atleast think) that putting o2 sims (on the rear) would not set off a cel if I removed my rear cat (only cat on the car).