Highflow cat?
02-21-2005, 10:00 AM
#1
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Join Date: Oct 2004
Posts: 26
Highflow cat?
should i buy a high flow cat with the cattman exhust?
also where can i buy a high flow cat? any name brands?
i have cattman headers installed right now. how much more HP will i get from adding the mods listed above?
also where can i buy a high flow cat? any name brands?
i have cattman headers installed right now. how much more HP will i get from adding the mods listed above?
02-21-2005, 10:50 AM
#3
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Join Date: Oct 2004
Posts: 26
yes i know headers give me 20 30 hp.
but what about the highflow cat/cattman catback exhaust
how much hp will i get out of that?
does warpspeed have a site? if so send me the link
but what about the highflow cat/cattman catback exhaust
how much hp will i get out of that?
does warpspeed have a site? if so send me the link
02-21-2005, 11:19 AM
#5
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so does the hiflow cat even give any hp gains?
why should i get the hiflow cat if it does nothing for me
why should i get the hiflow cat if it does nothing for me
02-21-2005, 11:20 AM
#6
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Cattman have a new hiflow cat out. I bought one. It's not installed but the quality looks great. Chromed, it's a shame it's under the car 
He said it gives about 15whp. E-mail him or PM him, I think his username is simply "Cattman".
He said it gives about 15whp. E-mail him or PM him, I think his username is simply "Cattman".
02-21-2005, 11:23 AM
#7
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nice i was gonna ask if cattman made a high flow cat but i havnt seen anyone mention it on the board
02-21-2005, 01:02 PM
#8
Originally Posted by JClaw
Cattman have a new hiflow cat out. I bought one. It's not installed but the quality looks great. Chromed, it's a shame it's under the car He said it gives about 15whp. E-mail him or PM him, I think his username is simply "Cattman".
He said it gives about 15whp. E-mail him or PM him, I think his username is simply "Cattman".Is it just me? Or does everyone think this is possible? I hafta call
unless I see a good explanation or some dynos or something.... I can't (and this may be due to my lack of knowledge) see how a high flow cat can free up 15 whp... even straight/test pipes don't get gains like that....
02-21-2005, 01:51 PM
#9
i could see it if the cat was clogged with a towel then dynoed against a high flow cat. i hope i sense some sarcasm from jclaw. if it did give 15hp and was as simple to replace as a cat is, dont you think it would cost a lot more. 15hp @ the wheels is more than y pipe will put on a manual cali spec. more reasonable assumption would be 2-3 in upper rpms if the rest of the exhaust was opened up and more gains if boost was involved.
02-21-2005, 03:35 PM
#12
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i have cattman headers already...
how much more HP will i get from a highflow cat and cattman cat-back exhauset?
about 10 additional HP... does that sound right?
how much more HP will i get from a highflow cat and cattman cat-back exhauset?
about 10 additional HP... does that sound right?
02-21-2005, 04:16 PM
#15
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Join Date: Jan 2004
Location: West Henrietta, NY
Posts: 831
Originally Posted by Puppetmaster
A high flow cat alone gives 15 whp???
Is it just me? Or does everyone think this is possible? I hafta call unless I see a good explanation or some dynos or something.... I can't (and this may be due to my lack of knowledge) see how a high flow cat can free up 15 whp... even straight/test pipes don't get gains like that....
Is it just me? Or does everyone think this is possible? I hafta call
unless I see a good explanation or some dynos or something.... I can't (and this may be due to my lack of knowledge) see how a high flow cat can free up 15 whp... even straight/test pipes don't get gains like that....
02-21-2005, 04:34 PM
#16
i should have been more clear. my remarks were aimed at high flow cats but the numbers i was stating was geared towards a testpipe. i realize our stock cat flow well unless they have a problem but it is not going to flow as well as a testpipe. i wanted all restrictions from my exhaust aside from the stock muffler. i got a warpspeed testpipe for 40 shipped and have been pretty happy with it. it takes all of 15 minutes to swap it out for the real cat and pass emissions that i have once a year.
02-21-2005, 04:36 PM
#17
Originally Posted by mdloops
I doubt you will get 5WHP out of that. DON'T buy into the high flow cat BS. Besides the fact you are breaking a federal law by swapping out a perfectly good cat before 80K miles (if it applies) you will be wasting your money. For the LAST TIME STOCK CATS FLOW AS GOOD AS AFTERMARKET CATS. WE ARE NOT STILL IN THE 80s people. I expect in the next 10 years the catback will be obsolete also because stock catbacks are flowing almost as good at aftermarket ones now. Buy headers and ECU. Those are biggest 2 gains for the max. All other mods will nickel and dime you to death for very little results.
Also, the law is 50k before you can remove the cat (unless its damaged).
02-21-2005, 04:37 PM
#18
Originally Posted by sloppymax
i should have been more clear. my remarks were aimed at high flow cats but the numbers i was stating was geared towards a testpipe. i realize our stock cat flow well unless they have a problem but it is not going to flow as well as a testpipe. i wanted all restrictions from my exhaust aside from the stock muffler. i got a warpspeed testpipe for 40 shipped and have been pretty happy with it. it takes all of 15 minutes to swap it out for the real cat and pass emissions that i have once a year.
you two are talking about two COMPLETELY different things. He has an 02/03 and you have an 01. The parts are very different, as are the exhaust systems....so the effects from mods will affect each system differently.
02-21-2005, 05:31 PM
#19
Originally Posted by E55AMG2
you two are talking about two COMPLETELY different things. He has an 02/03 and you have an 01. The parts are very different, as are the exhaust systems....so the effects from mods will affect each system differently.
my point is if you want the best flowing piece then get a test pipe. it is cheaper, can be replaced by stock cat in a matter of minutes and has no pieces that can fail (RT cat) or melt (stock cat).
02-21-2005, 05:35 PM
#20
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Join Date: Feb 2005
Posts: 69
I agree with sloppymax. I feel the difference after installing race cat (similar to test pipe but with resonator). I feel a better acceleration at high RPM.
02-21-2005, 05:36 PM
#21
Originally Posted by sloppymax
i realize we are talking about two different parts but what i am saying the test pipe is a better way to go.
how would having a 02 with headers and an 01 with headers affect the cat any differently? the 3.5 doesnt create some additional magical heat that causes cats to fail any faster than it would if it was an 01.
my point is if you want the best flowing piece then get a test pipe. it is cheaper, can be replaced by stock cat in a matter of minutes and has no pieces that can fail (RT cat) or melt (stock cat).
WSP metal sub cats dont fail, and test pipes throw off the air/fuel ratios beyond correctable measure. So, in this case, the additional flow would be offset by the power loss due to incorrect air fuel mixtures.
02-21-2005, 05:51 PM
#22
Originally Posted by E55AMG2
No, its not
The main difference is that the 02/03 cat convertors are a DIFFERENT part, with DIFFERENT specs. Now, what you are asking yourself is "so what". The answer to that is that the 02/03 convertor is a higher flowing unit, but without any improvement in heat resistance to the elements inside. They simply melt after a short while with the headers. Hell, i melted mine all stock.
WSP metal sub cats dont fail, and test pipes throw off the air/fuel ratios beyond correctable measure. So, in this case, the additional flow would be offset by the power loss due to incorrect air fuel mixtures.
The main difference is that the 02/03 cat convertors are a DIFFERENT part, with DIFFERENT specs. Now, what you are asking yourself is "so what". The answer to that is that the 02/03 convertor is a higher flowing unit, but without any improvement in heat resistance to the elements inside. They simply melt after a short while with the headers. Hell, i melted mine all stock.
WSP metal sub cats dont fail, and test pipes throw off the air/fuel ratios beyond correctable measure. So, in this case, the additional flow would be offset by the power loss due to incorrect air fuel mixtures.
if you melted yours all stock then why is everyone else on the board not having the same issue? you may have had an defective unit but you cannot tell me everyone with a 2k2/2k3 is going to melt their cat simply because it flows better with no improvements to heat resistance whether it is stock or not. i should be dynoing soon as well as tuning and i will post results of the a/f change from headers on an 01. if you want, ill do one with my stock cat and testpipe.
02-21-2005, 08:16 PM
#23
Originally Posted by sloppymax
how do you figure the test pipe throws off a/f when the 2 o2 sensors monitoring it are upstream?
if you melted yours all stock then why is everyone else on the board not having the same issue? you may have had an defective unit but you cannot tell me everyone with a 2k2/2k3 is going to melt their cat simply because it flows better with no improvements to heat resistance whether it is stock or not. i should be dynoing soon as well as tuning and i will post results of the a/f change from headers on an 01. if you want, ill do one with my stock cat and testpipe.
02-21-2005, 09:15 PM
#24
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Join Date: Feb 2005
Posts: 295
Is it me, or has this turned into a really nasty argument?
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