Cat delete pipes and O2 sensors

can i run a cat delete pipe on a Stage 0 car and not have the a check engine light on.:worthy:

 

yeah you can just get an cat sim they sell them on ebay for around $10



works like this

 

you can get the same thing at autozone for $1.63 its called a spark plug non fouler

 

do you have a part # for it?

 

No with the stage 1 computer you do not have to worry about that correct? it turns off the signal from the down stream O2.

 

no but its pretty easy to find

 

They usually have it in the section where they sell all the random replacement crap. IIRC you will need to drill out the center hole slightlyto fit the sensor.

 

yeah if you have/get an S1 PCM no need to worry about it. also if you get the preditor you can turn it off also.

 

there is one that you dont have to...

 

so since the Stage 1 computer are on back order night now and my new one is in that "back" order i guess that i am out of luck until then. i bought the last Mopar cat delete Pipe from my local dealer for $350. it has since been discontinued also by Mopar.

 

you could have bought a 3in downpipe with Electric cutout for that price.

 

yeah, ouch

 

even better.

 

OH YEA I KNOW I KNOW. I COULD HAVE GOTTEN A LOT OF THINGS. I spent the same on my Mopar exhaust as i could have on the entire MPx exhaust but I still like the O.E. fit and finish of a factory Exhaust. And besides for me i am running stock turbo and a few small bolts on's. there is no advantage to the 3" over the 2 1/2 unless you are making over 300bhp.

 

there are a few things wrong with that statement. the "mopar" exhaust stuff is made by borla, the mopar downpipe has worse fitment than the needswings cutout pipe, i know first hand.

you will see a gain going to 3in over the 2.5in even on a 100% stock car, this i also know first hand.

 

http://maxxfab.com/welcome.html http://www.modernperformance.com/dcx/srt_4_borla_dyno.jpg
Here are Maxfab's dyno run results as well as MPx...
MaxxFab test their Full 3" turbo back against their 3" o2 housing and down pipe w/ Borla cat back and the results; a difference of 0.8 hp and 3.4ft lbs. from that result I could not really tell you if it makes that BIG of a difference. Now granted i only changed the down pipe and not the o2 housing. Not even a big gain on MPx results on Borla cat back vs. the Full 3" turbo back from Maxxfab. 7hp & 6.8ftlbs just the cat cat back vs. stock exhaust with MPx dyno. So I think that it comes down to a matter of opinion in some of these cases. My pipe bolted right up. No fitment issues. Like I tell my customers "you should buy what you like". and besides dont you want a little bit of back pressure? but like i said i Bought the mopar one because i liked it the best Not to say that other ones aren't "better". I felt this set up was most efficient. not the "If a 3" exhaust is good then a 4" must be better" idea.

(this is only for comparison as these are 2 different cars (w/ like parts) and dyno's.)
(note how close the base line runs are between these 2 dyno's.)

MPx car Stage 1 w/ Aem
stock - 230.7hp 246.ftlbs
cat back - 237.7hp 252.8ftlbs

7hp & 6.8ftlbs just the cat cat back vs. stock

maxxfab car - stage 1 aem, stock boot
stock - 231.3hp 251.2ftlbs
Full 3" turbo back - 242.1hp 263.1ftlbs

11.2hp & 12.1ftlbs Stock vs. Full 3" but only
~5.6hp & 11.7ftlbs 3" vs. Borla cat back.~
(MaxxFab car Did have more Ftlbs to start)

maxxfab car stage 1, Aem, AGP waste gate actuator @ 18 psi.
3" w/ Borla cat back- 266.2hp 301.8ftlbs
Full 3" - 267.0hp 304.4ftlbs
.8hp & 3.4ftlbs 3" to 2 1/2" vs. full 3"

 

$4.99 at CSK/O'Rileys. The spark plug non foulers you use are for a Ford motor. and mine work great! thanks for the tiP!

 

Did you just compare the MPx catback to the maxxfab turboback?
Wtf

 

Yes. Its the Mopar cat back to the Maxx Fab full 3". MPx has not posted to my knowledge a a dyno run w/ and w/o their full 3" system. the debate here is do you really need a full 3" system or would a Full 2 1/2" "catless" system be OK for most SRT guys? i say the latter.

 

I guess it depends on what you're going for. If you're going to go big turbo I would suggest a full 3" of course. There are a lot of factors that can help you make that decision: noise, emissions, personal preference, etc.