Need info from the guys who have done cat swaps...
#1
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As y'all are aware, I bought the 2.5" spun Magnaflow universal cats as part of a custom exhaust system. I dropped the car off to a friend last weekend to do the install and welding, and he will have the car until Sunday.
He called me a few mins ago, while he was underneath the car. He tells me that he is reluctant to mess with the factory cats, because they appear to be part of a larger piece that bolts directly to the manifold.
I told him that this is a rather common swap, as is apparent on these forums. So, to you guys who have done it or have had it done...
-- does this sound familiar? What does he need to do to put these cats on? Also, he is having problems finding the O2 sensors. He is about to see if he can find them from under the hood, instead of from under the car. He says the cats are pretty high in the engine bay. Where are these sensors (or, how high are they?). I am presuming there are 4 total, 2 before and 2 after.
I have never seen the area he is talking about. Any info would be helpful.
Thanks in advance...
He called me a few mins ago, while he was underneath the car. He tells me that he is reluctant to mess with the factory cats, because they appear to be part of a larger piece that bolts directly to the manifold.
I told him that this is a rather common swap, as is apparent on these forums. So, to you guys who have done it or have had it done...
-- does this sound familiar? What does he need to do to put these cats on? Also, he is having problems finding the O2 sensors. He is about to see if he can find them from under the hood, instead of from under the car. He says the cats are pretty high in the engine bay. Where are these sensors (or, how high are they?). I am presuming there are 4 total, 2 before and 2 after.
I have never seen the area he is talking about. Any info would be helpful.
Thanks in advance...
Last edited by Phil_Deeznuutz; 09-28-2010 at 04:27 PM. Reason: I fail at typing.
#2
#3
#4
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Then, it sounds like the downstream sensors can go wherever, so long as they are downstream. Is this accurate?
#5
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Phil, my previous post describes the stock cats i.e upstream O2 sensor plugs directly into the inlet end of the cat, whilst the down stream O2 sensor plug in just aft of the cat. For the spun hi-flo cat, the upstream O2 sensor is fitted just prior to the cat (the spun cat doesn't have an O2 sensor fitting) whilst the down stream O2 sensor is plugged in just aft of the cat. Your basically placing the O2 sensors the same as stock except the upstream O2 sensor is not plugged directly into the spun hi-flo cat but just before it. Perform a hard re-set of the ECU, drive her in Normal transmission mode for a few hundred miles then drive her in Sport mode real hard. Let us know how it goes. Though she'll ooze noticeable more power, one thing I know for sure is noticeably crisp and quick throttle response with an authoritive exhaust bark, the likes that will make it difficult for you to leave her alone.
#6
#7
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#8
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Alright, I went to the spot where my car is, and developed a plan for O2 sensor placement...should be ok.
My next question: Under the stock pipes, between the resonator and cats, there is a black metal bracket of some sort. This, in stock configuration, is found under the small portion of raised pipe (the pipe is raised over this piece).
As far as we could tell, the pipe does not actually touch this bracket at any time. We are guessing that it functions as 1) a way to secure the plastic covers found around that area and 2) a way to ensure the exhaust piping, if broken, will not fall to the ground.
What did y'all do with this piece when your stuff got swapped out?
My next question: Under the stock pipes, between the resonator and cats, there is a black metal bracket of some sort. This, in stock configuration, is found under the small portion of raised pipe (the pipe is raised over this piece).
As far as we could tell, the pipe does not actually touch this bracket at any time. We are guessing that it functions as 1) a way to secure the plastic covers found around that area and 2) a way to ensure the exhaust piping, if broken, will not fall to the ground.
What did y'all do with this piece when your stuff got swapped out?
#9
#10
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The guy doing this work asked if he can cut this bracket and remove the center portion, thereby still being able to secure the covers while not having it be located under the piping at all. Is this problematic?
#11
#12
![Default](/forum/images/icons/icon1.gif)
As y'all are aware, I bought the 2.5" spun Magnaflow universal cats as part of a custom exhaust system. I dropped the car off to a friend last weekend to do the install and welding, and he will have the car until Sunday.
He called me a few mins ago, while he was underneath the car. He tells me that he is reluctant to mess with the factory cats, because they appear to be part of a larger piece that bolts directly to the manifold.
I told him that this is a rather common swap, as is apparent on these forums. So, to you guys who have done it or have had it done...
-- does this sound familiar? What does he need to do to put these cats on? Also, he is having problems finding the O2 sensors. He is about to see if he can find them from under the hood, instead of from under the car. He says the cats are pretty high in the engine bay. Where are these sensors (or, how high are they?). I am presuming there are 4 total, 2 before and 2 after.
I have never seen the area he is talking about. Any info would be helpful.
Thanks in advance...
He called me a few mins ago, while he was underneath the car. He tells me that he is reluctant to mess with the factory cats, because they appear to be part of a larger piece that bolts directly to the manifold.
I told him that this is a rather common swap, as is apparent on these forums. So, to you guys who have done it or have had it done...
-- does this sound familiar? What does he need to do to put these cats on? Also, he is having problems finding the O2 sensors. He is about to see if he can find them from under the hood, instead of from under the car. He says the cats are pretty high in the engine bay. Where are these sensors (or, how high are they?). I am presuming there are 4 total, 2 before and 2 after.
I have never seen the area he is talking about. Any info would be helpful.
Thanks in advance...
Let us know the final outcome
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Last edited by jag79; 10-04-2010 at 07:15 PM.
#13
#14
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**I attached some very useful info about after reseting the ECU, you will get a DTC error code P1000, and you have 7 steps to do for reprogramming, take a look at pages 4-8. Do you think if I do what you mentioned earlier; will it give me the same solution as what I sent you with performing the 7 steps.
Please do let me know and thanks again for your help.
Take care bro.
TAriq.
Last edited by jag79; 10-05-2010 at 05:34 PM.
#15
#16
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jag79, ok, I know what you mean by recalibrating the systems outlined in the info you passed on to me. The info serves as a means of monitoring and calibrating. I'm not sure if the processes are involved in clearing adaptive learning (learned behaviors conveyed by the driver to the adaptive learning program)?
#17
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jag79, ok, I know what you mean by recalibrating the systems outlined in the info you passed on to me. The info serves as a means of monitoring and calibrating. I'm not sure if the processes are involved in clearing adaptive learning (learned behaviors conveyed by the driver to the adaptive learning program)?
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#18
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