Magnaflow High Flow Cat Vs. RT Cat. Vs. Striaght Pipe
#1
CL-SEXY SIX (=
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Magnaflow High Flow Cat Vs. RT Cat. Vs. Striaght Pipe
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?
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?
#4
4drs just wanna have fun!
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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
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
#5
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You could be having a issue with the rear 02 sensor and not the cat.
#6
Suzuka Master
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Originally Posted by Accord_V6_400m
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.
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#8
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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.
#9
4drs just wanna have fun!
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Originally Posted by CleanCL
i'm 90% sure the comptech j-pipe inner diameter is 2", also most catbacks are 2.5" at the cat outlet.
#10
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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
http://www.scoobymods.com/forums/showthread.php?t=5468
#13
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Originally Posted by poisx7
wht RT cat do u recommnd ? got links
And i want to assume one needs the spacer with the rt cat or an extender
And i want to assume one needs the spacer with the rt cat or an extender
#18
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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
#19
But I just got here
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Originally Posted by krisdlm
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
You lost 30hp with the RT cat?? How is that even possible??? Unless the thing was defective or something.
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Originally Posted by Nitin
You lost 30hp with the RT cat?? How is that even possible??? Unless the thing was defective or something.
#22
Former Sponsor
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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.
#27
Whats up with RDX owners?
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Universal Magnaflow hf cat
#29
Whats up with RDX owners?
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Paul bought it, not sure where its from, its a spun cat though. I had to install a defouler. No lights.
#30
Suzuka Master
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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.
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.
#35
Whats up with RDX owners?
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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"?
Is the rest of your exhaust 2.5"?
#37
Whats up with RDX owners?
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