Harrisonk531616

Just wondering who is running either of these cats and their experiences from them.

I personally had two RT cats. I had one on for 2 months when i was N/A and the P0420 Code came up "insufficent Flow". So i took it off and put my stock one back on. Sent the cat back to RT (they were very helpful), they sent me a new one within the next two weeks. I did not put on the cat until i had my S/C on, and one week after i had it on; MIL lamp is back on with the 420 code.

The car doesn't seem to be going into Limp mode which is what confuses me.
The A/F ratio sensor in the front of the cat is suppose to monitor and adjust the mixture at real time. And the rear O2 should be fine tuning the mixture as well...so i dunno...tell me if im wrong.

So my question is; has anyone else encountered these problems with the RT cat?

Has anyone install the magnaflow high flow cat? http://www.hottexhaust.com/detail.asp?PRODUCT_ID=42603 <<

Straight pipes as well? any problems?

BigLizard

I had the RT cat on my CL-P and never had any issues. what's your problem?

m733l

iTrader: (1)

had rt cat for several months now with no problems from the beginning. noticed it revs up faster.

Accord_V6_400m

iTrader: (1)

Also had RT cat before worked better then my J30A1 cat, think Magnalfow is prety much the same in terms of flow, managed to pass smog with RT cat barely. Problem with direct fit RT cat is its inlet/outlet size are both stock at 2.0" It should at least be 2.25" to match catback piping and the Comptech j-pipe collector.

Haven't had any experience with the straight pipe but it shuld probably fow a tad better like a hp or two better.

I shop I went to that has its own mandrel bender doesn't like using magnaflow cats apparently it goes out too much, didn't have the problem with the RT cat and still dont with teh magnaflow cat.

Another thing to take into consideration is the exhaust sound it tends to get more raspy the more you free it up, at least thats my experience

fsttyms1

You could be having a issue with the rear 02 sensor and not the cat.

CleanCL

iTrader: (4)

i'm 90% sure the comptech j-pipe inner diameter is 2", also most catbacks are 2.5" at the cat outlet.

CleanCL

iTrader: (4)

yup, or something entirely else (front o2 or car is running way too rich or lean)

foreveraflboy

straight pipe here with no codes, but i know it would not pass inspection. Lucky for me I'm in FL. On a side note i did have to move the 02 sensor out with a spacer. Oh and I am also SC running 9lbs with the aftercooler, so you should have no problem. My test pipe was custom made with the flanges on both ends so it just bolts right in. If you decided to go this way you could always remove it and install your cat for inspection.

Accord_V6_400m

iTrader: (1)

Maybe.. aftermarket catbacks for the CLS yes but in this case I was refering to the stock system. Im running a 2.5 inlet/outlet on my magnaflow cat, although on the cats heat shield it says shultz so who knows.

rtatsutani

I have rear O2 codes after gutting my cat out. Putting in the spacers like foreveraflboy and gonna see if that does the trick. Here's the link I followed.

http://www.scoobymods.com/forums/showthread.php?t=5468

gc86

Like kris said, your o2 sensors are probably old. RT cat is the best way to go, period.

poisx7

iTrader: (1)

wht RT cat do u recommnd ? got links
And i want to assume one needs the spacer with the rt cat or an extender

fsttyms1

Contact Excelerate, he has the RT cat for our cars. The only thing you need is a extender for the wire harness. No defoulers are needed

SlickShiftNall6

iTrader: (4)

RT cat here, had it for about 2 months no probs or codes. Bought mine from excelerate got bolt and gasket kit, along with 02 extension. Made install very easy, also I didn't have to tap out the flange on the exhaust like some people had mentioned.

poisx7

iTrader: (1)

do u have a type s or just a regular tl/cl.
dont know if that matters as per exhaust etc......................

m733l

iTrader: (1)

^ rt makes only one. it's for the clp but it will also fit the cls. i have a cls 6mt and i had to modify the holes becasue they didn't line up.

dru2

Thinking of getting the Magnaflow cat - still wondering what the difference is between that and the Random Technology one.

krisdlm

iTrader: (1)

check the diameter specs. I lost almost 30whp off the rt cat b/c the diameter was so small so when i put the oem one back on i showed immediate gains on the dyno. I wonder if gutting out or putting a straight pipe would provide gains

Nitin

iTrader: (1)

You lost 30hp with the RT cat?? How is that even possible??? Unless the thing was defective or something.

krisdlm

iTrader: (1)

not enough air getting through, rt was meant for na cars

BigLizard

While looking...try the Twister race muffler...they provide a mean sound.

http://www.flopro.com/Twister.htm

Excelerate

iTrader: (1)

P0420 doesn't necessarily mean the cat is bad if you have an aftermarket cat. It just means the cat is flowing too much for what the ECU wants to see. You can solve that by running an 02 defouler which pushes the secondary 02 sensor further out from the exhaust stream so it doesn't throw that code. P0420 is Catalyst Efficiency Below Threshold. The secondary 02 sensor is only there to see if the cat is doing its job. The cat is doing its job just flowing so much that the ECU doesn't like it and think's the cat isn't doing its job.

Patricktyrka

does the rt cat fit with the comptech headers and comptech axel back?

krisdlm

iTrader: (1)

it should, worked fine w/ my greddy exhaust

dru2

Is anyone be running any of the high flow cats with Comptech headers+B-pipe?

If so which cat are you using?

richardparker

iTrader: (7)

What cat is everyone using now ?

civicdrivr

iTrader: (9)

Universal Magnaflow hf cat

richardparker

iTrader: (7)

The one on ebay for 65 bucks ?
2.5" ?
Defouler ?
Any lights ?

civicdrivr

iTrader: (9)

Paul bought it, not sure where its from, its a spun cat though. I had to install a defouler. No lights.

zeta

iTrader: (1)

I've been running the XLR8 HF cat for a year now with no defouler and have had no codes.
This includes S/C'er, CT headers, b-pipe and stock mufflers.

The only issue I had with the HF cat was during the install. I had to disconnect the O2 sensor wiring from the OEM anchor clip(s) under the car for it (O2 sensor connection) to reach adequately.

CL-S progression 01

iTrader: (2)

^^ small price to pay i think.. if it works.

would you recommend it for someone with a decent amount of bolt-ons. including headers obviously

SPoolinspOON

iTrader: (5)

really? I have the same thing and I didn't need a defouler....

gnuts

iTrader: (1)

i also have a magnaflow universal 2.5" in and out cat. I do get a code every few months but it clears itself eventually....

CL-S progression 01

iTrader: (2)

^^ did u notice the cat?? or would u consider it a hp mod?

civicdrivr

iTrader: (9)

Yea, after about 2k miles on it a code came up for it. I cleared it and it never came back, but I didnt want the hassle of it popping up again.

Is the rest of your exhaust 2.5"?

gnuts

iTrader: (1)

i had the 2.5" in/out cat to a 2.5" all the way to the axlebacks, which are stock for now. Top end seemed to flow better. I have more power upgrades in mind, so that's why i did it.

civicdrivr

iTrader: (9)

I have just a slight bit of torque loss down low, but up top it screams.

CL-S progression 01

iTrader: (2)

i think i could use the xlr8 cat to make my car flow better.

I have... headers, intake, plenums, tb spacer, pullies.

i wanna do something else and i think the cat would be it.. what do u all think

.. srry for threadjak

gnuts

iTrader: (1)

if i could do it again i would wait and get a nice full 2.5". I heard tanabe is coming out with a catback...