Performance cats?
06-07-2008, 04:29 AM
#26
I would NOT eliminate the primaries, Just weld in a set of 200 cell race cats for primaries. Whether you want to do secondaries is optional, they won't effect O2 sensors since they are after the O2s. Keep primaries but upgrade them to something better, you won't be disappointed. The power gains between 200 cell and straight pipes is almost nothing, but the gains over stock 400-600 cell can be drastic, theres no reason to eliminate cats all together
06-08-2008, 03:26 PM
#27
Now I get everything, thanks guys. I'm going to start with deleting the 2nds and see how it drives.
I would NOT eliminate the primaries, Just weld in a set of 200 cell race cats for primaries. Whether you want to do secondaries is optional, they won't effect O2 sensors since they are after the O2s. Keep primaries but upgrade them to something better, you won't be disappointed. The power gains between 200 cell and straight pipes is almost nothing, but the gains over stock 400-600 cell can be drastic, theres no reason to eliminate cats all together
06-09-2008, 06:52 AM
#29
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Replacing the primaries will not be an easy task. That's why I went ahead and bought the Kleeman headers for better breathing and to eliminate the primaries. At the least everyone should replace the secondaries and upgrade to 3" catback.
I'll let everyone knowthat I did get a CEL though because of the O2 sensors .I can't remember exactly what it said (something about low O2 sensor threshold)but it did have something to do with the O2 sensors which were moved further down stream.
I'll let everyone knowthat I did get a CEL though because of the O2 sensors .I can't remember exactly what it said (something about low O2 sensor threshold)but it did have something to do with the O2 sensors which were moved further down stream.
06-09-2008, 10:20 AM
#30
Replacing the primaries will not be an easy task. That's why I went ahead and bought the Kleeman headers for better breathing and to eliminate the primaries. At the least everyone should replace the secondaries and upgrade to 3" catback.
I'll let everyone knowthat I did get a CEL though because of the O2 sensors .I can't remember exactly what it said (something about low O2 sensor threshold)but it did have something to do with the O2 sensors which were moved further down stream.
I'll let everyone knowthat I did get a CEL though because of the O2 sensors .I can't remember exactly what it said (something about low O2 sensor threshold)but it did have something to do with the O2 sensors which were moved further down stream.
06-09-2008, 10:35 AM
#31
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sounds like airplane
i don't think we need a full cat-back
i'd be willing to dyno my car before and after replacing the stock muffler with just about anything that doens't make it sound like a truck and then post the results...
I have no secondary cats or resonator as is
i'd be willing to dyno my car before and after replacing the stock muffler with just about anything that doens't make it sound like a truck and then post the results...
I have no secondary cats or resonator as is
06-09-2008, 12:52 PM
#32
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'98 C43 AMG. Obsidian Blk w/2 tone slvr/blk interior
the way youre describing the cel it seems to me that youre still rolling around with the CEL on, how did you remedy the problem?
06-10-2008, 04:33 PM
#33
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1996 C36 AMG, 1995 Volvo 850 Turbowagon
i am running this cat from verocious motor sports for my wagon
06-10-2008, 08:44 PM
#34
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Muffler alone won't show you much of anything.
06-10-2008, 08:46 PM
#35
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No I got the CEL cut off but for some reason when I got the car inspected they were still able to tell I had a past fault. They told me exactly what it was even though I already knew. I guess my guy cut off the Cel but did not delete the code. I will have to disco my batt as a shrt cut to completely erase the code.However there are a few ways to completely remedy this but I'm lazy. 1 way is by having kleeman remove the CEL permanently or the other way is to add a spacer to the O2 bung I'm told. Active autowerks also sells O2 simulators that a few guys have placed on their W211 E55 Kompressors.
Last edited by ProjectC55; 06-10-2008 at 08:49 PM.
06-11-2008, 12:17 AM
#37
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I used 200 cell metal matrix cats, but they would not fit in the primary locations. So the O2 sensors will need to be extended.
https://mbworld.org/forums/attachmen...0&d=1213135886
https://mbworld.org/forums/attachmen...1&d=1213135886
https://mbworld.org/forums/attachmen...0&d=1213135886
https://mbworld.org/forums/attachmen...1&d=1213135886
Last edited by Ghostrider; 06-11-2008 at 12:20 AM.
06-11-2008, 02:15 AM
#39
Nobody has mentioned this... but you can get O2 simulators as well if you like.
Only the true MB scanner can completely eliminated it from the ECU, those normal autozone & ebay scanners can get rid of a CEL light and can wipe it clean, but it won't wipe the stored records. You need the $$$$$ MB scanner to do that job, hence why they could still know you had the fault.
Only the true MB scanner can completely eliminated it from the ECU, those normal autozone & ebay scanners can get rid of a CEL light and can wipe it clean, but it won't wipe the stored records. You need the $$$$$ MB scanner to do that job, hence why they could still know you had the fault.
06-11-2008, 02:54 AM
#40
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06-11-2008, 05:46 AM
#41
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Nobody has mentioned this... but you can get O2 simulators as well if you like.
Only the true MB scanner can completely eliminated it from the ECU, those normal autozone & ebay scanners can get rid of a CEL light and can wipe it clean, but it won't wipe the stored records. You need the $$$$$ MB scanner to do that job, hence why they could still know you had the fault.
Only the true MB scanner can completely eliminated it from the ECU, those normal autozone & ebay scanners can get rid of a CEL light and can wipe it clean, but it won't wipe the stored records. You need the $$$$$ MB scanner to do that job, hence why they could still know you had the fault.
As far as the CEL lght is concerned I know the Star diagnostic device removes it completely.
06-11-2008, 12:42 PM
#42
my bad, late night haha.
ya AA sell O2 simulators, but its better imo to keep them b/c then your ECU really doesn't know whats going on in the engine, what if something goes wrong, theres no way for your ECU to adapt or correct. I would just replace both primary & secondaries with high flows, that alone will make a decent different in sound & performance.
ya AA sell O2 simulators, but its better imo to keep them b/c then your ECU really doesn't know whats going on in the engine, what if something goes wrong, theres no way for your ECU to adapt or correct. I would just replace both primary & secondaries with high flows, that alone will make a decent different in sound & performance.
06-11-2008, 05:42 PM
#45
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06-12-2008, 12:08 AM
#46
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sounds like airplane
the lc1 would be sending the same signal as the regular sensor would be...
it is not designed as a mil eliminator but rather so that you can retain stock signal (so the computer can do it's job) without having to weld in additional bungs for multiple sensors.
has anyone actually removed the front cats to see if that does even throw a cel or cause other issues though? it's very possible it will not create any issues at all (otherwise how are the headers working without them?). if that's the case then that's great news- but having the lc1 or similar won't do anything to help.
it is not designed as a mil eliminator but rather so that you can retain stock signal (so the computer can do it's job) without having to weld in additional bungs for multiple sensors.
has anyone actually removed the front cats to see if that does even throw a cel or cause other issues though? it's very possible it will not create any issues at all (otherwise how are the headers working without them?). if that's the case then that's great news- but having the lc1 or similar won't do anything to help.
06-12-2008, 10:27 AM
#47
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the lc1 would be sending the same signal as the regular sensor would be...
it is not designed as a mil eliminator but rather so that you can retain stock signal (so the computer can do it's job) without having to weld in additional bungs for multiple sensors.
has anyone actually removed the front cats to see if that does even throw a cel or cause other issues though? it's very possible it will not create any issues at all (otherwise how are the headers working without them?). if that's the case then that's great news- but having the lc1 or similar won't do anything to help.
it is not designed as a mil eliminator but rather so that you can retain stock signal (so the computer can do it's job) without having to weld in additional bungs for multiple sensors.
has anyone actually removed the front cats to see if that does even throw a cel or cause other issues though? it's very possible it will not create any issues at all (otherwise how are the headers working without them?). if that's the case then that's great news- but having the lc1 or similar won't do anything to help.
So if the LC-1 simulates this signal at all times, how would the ECU know if the primary cats were there or not?
How do other O2 simulaters/eliminators work?
06-12-2008, 11:46 AM
#48
no it has a small range. I forget the exact numbers. the name suggest exactly what it does, narrow band or wide band. wide band just has much wider limits to its O2 monitoring as its name suggests. I think narrow goes from like 13.7-14.7 and wide band can go from like 12-16 depending on cars and which kits you use. Either way wide band is NOT necessary for this, wideband is really only necessary if you are putting in an A/F gauge in the car and you want a real accurate measurement or you are running some sort of piggyback/standalone ECU.
06-12-2008, 12:42 PM
#49
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the lc1 would be sending the same signal as the regular sensor would be...
it is not designed as a mil eliminator but rather so that you can retain stock signal (so the computer can do it's job) without having to weld in additional bungs for multiple sensors.
has anyone actually removed the front cats to see if that does even throw a cel or cause other issues though? it's very possible it will not create any issues at all (otherwise how are the headers working without them?). if that's the case then that's great news- but having the lc1 or similar won't do anything to help.
it is not designed as a mil eliminator but rather so that you can retain stock signal (so the computer can do it's job) without having to weld in additional bungs for multiple sensors.
has anyone actually removed the front cats to see if that does even throw a cel or cause other issues though? it's very possible it will not create any issues at all (otherwise how are the headers working without them?). if that's the case then that's great news- but having the lc1 or similar won't do anything to help.
Last edited by ProjectC55; 06-12-2008 at 12:47 PM.
06-12-2008, 02:44 PM
#50
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'98 C43 AMG. Obsidian Blk w/2 tone slvr/blk interior
how much power do you make with that 55 motor, heads, and whatever else you did to it? u think ur dippin into the 400's? your torque prob is more than 400...any dynos?
