100 cell and 200 cell cats whats the diff?
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Here is a quote from Mike over at AWE Tuning (for the 997 though, so with a turbo it might make more hp difference) :
"It has also been drilled into all your heads that 100 cell cats will lead you to the promise land of Porsche performance. Did you know that dyno results yield a 2hp gain over our 300 cell units? We were tired of hearing folks complain of check engine lights due to catalyst efficiency codes. All you needed was 200 more cells! Why were you settling? Did you really need that 2hp?
We use a 300 cell cat made in the U.S. for OUR emissions standards, not Germany's."
"It has also been drilled into all your heads that 100 cell cats will lead you to the promise land of Porsche performance. Did you know that dyno results yield a 2hp gain over our 300 cell units? We were tired of hearing folks complain of check engine lights due to catalyst efficiency codes. All you needed was 200 more cells! Why were you settling? Did you really need that 2hp?
We use a 300 cell cat made in the U.S. for OUR emissions standards, not Germany's."
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Originally Posted by Ken
I have a switch to switch between a 200 cat system and straight pipes - I don't get a CEL light. The sound is awesome with the straight pipe and turbo lag non-existent.
For our cats,
The 200 Cell will have 80%-90% Airflow, is OBD II complaint and warrantied for 2Yrs/50K miles. THey will not give a CEL. They have 2 winding centers and is more than adequate for street use, which is why it's called Tuning cats.
The 100 Cell will have up to 95% Airflow, is not OBD II compliant and no warranty for OBD II. They have 3 winding centers, therefore they are more durable than the 200 Cell cats. They will give a CEL after 10K miles. They are for racing/track use, but can be used on the street. The 100 Cell cats are called Motorsport Cats.
Both are 100% Metallic.
The 200 Cell will have 80%-90% Airflow, is OBD II complaint and warrantied for 2Yrs/50K miles. THey will not give a CEL. They have 2 winding centers and is more than adequate for street use, which is why it's called Tuning cats.
The 100 Cell will have up to 95% Airflow, is not OBD II compliant and no warranty for OBD II. They have 3 winding centers, therefore they are more durable than the 200 Cell cats. They will give a CEL after 10K miles. They are for racing/track use, but can be used on the street. The 100 Cell cats are called Motorsport Cats.
Both are 100% Metallic.
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The 100 Cell will have up to 95% Airflow, is not OBD II compliant and no warranty for OBD II. They have 3 winding centers, therefore they are more durable than the 200 Cell cats. They will give a CEL after 10K miles. They are for racing/track use, but can be used on the street. The 100 Cell cats are called Motorsport Cats.
.
With all due respect:
1. What is 80, 90, 95% airflow?!?!? I've never heard of such a spec. Usually you spec pressure drop, in bar or mmhg for a given flow rate.
What are the specs for you cats at say 300 CFM?
2. I have 100 cell cats from europipe and they do not give a cel in 10,000 miles...why do yours?
3. I am sure that you know that you cannot say that a non OBD compliant cat "can be used on the street".
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FWIW, I've heard this spec in terms of an equivalent diameter open pipe (i.e. This muffler or cat flows 95% of the same diameter open pipe). But yeah, cfm at a relevant pressure drop would be good to know.
HJS.
With all due respect:
1. What is 80, 90, 95% airflow?!?!? I've never heard of such a spec. Usually you spec pressure drop, in bar or mmhg for a given flow rate.
What are the specs for you cats at say 300 CFM?
I do not have that data. This is the what HJS has quoted me. I will see if I can get more info.
2. I have 100 cell cats from europipe and they do not give a cel in 10,000 miles...why do yours?
I can't say. HJS has told me this so I can't say that it doesn't cause a CEL.
3. I am sure that you know that you cannot say that a non OBD compliant cat "can be used on the street".
With all due respect:
1. What is 80, 90, 95% airflow?!?!? I've never heard of such a spec. Usually you spec pressure drop, in bar or mmhg for a given flow rate.
What are the specs for you cats at say 300 CFM?
I do not have that data. This is the what HJS has quoted me. I will see if I can get more info.
2. I have 100 cell cats from europipe and they do not give a cel in 10,000 miles...why do yours?
I can't say. HJS has told me this so I can't say that it doesn't cause a CEL.
3. I am sure that you know that you cannot say that a non OBD compliant cat "can be used on the street".
Last edited by HJSUSA; Sep 9, 2010 at 07:43 PM.
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Seems like a sleazy spec...like saying an intercooler is "95%"... it is a spec without any significance. Is it really an 'equivalent flow' or are these guys just doing an area calc?
Since as we know it isn't a linear relationship, and what matters is the backpressure at WOT at 4500 -6500.
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From: Melbourne Beach, Fl
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For our cats,
The 200 Cell will have 80%-90% Airflow, is OBD II complaint and warrantied for 2Yrs/50K miles. THey will not give a CEL. They have 2 winding centers and is more than adequate for street use, which is why it's called Tuning cats.
The 100 Cell will have up to 95% Airflow, is not OBD II compliant and no warranty for OBD II. They have 3 winding centers, therefore they are more durable than the 200 Cell cats. They will give a CEL after 10K miles. They are for racing/track use, but can be used on the street. The 100 Cell cats are called Motorsport Cats.
Both are 100% Metallic.
The 200 Cell will have 80%-90% Airflow, is OBD II complaint and warrantied for 2Yrs/50K miles. THey will not give a CEL. They have 2 winding centers and is more than adequate for street use, which is why it's called Tuning cats.
The 100 Cell will have up to 95% Airflow, is not OBD II compliant and no warranty for OBD II. They have 3 winding centers, therefore they are more durable than the 200 Cell cats. They will give a CEL after 10K miles. They are for racing/track use, but can be used on the street. The 100 Cell cats are called Motorsport Cats.
Both are 100% Metallic.
Last edited by 9Eleven; Sep 10, 2010 at 10:29 AM.
