Hey guys i searched the forum and couldn't really find much info. on wether an high flow cat is good or bad? My question is i have the toucan one on my car seems like my car lost power i thought that was due to my ur underdrive pulley but was thinkin that the cat might have soemthing to do with it too . Let me know that u think.

Thanks will

 

Good, but most are still not street legel, i get a check engine light with mine after about 300 miles, just reset my ecu, don't want to buy a cel light checker

 

I am very happy with mine. Got it real cheap from Mufflertech.com. No CEL after over 5,000 miles.

 

Sometimes they will self destruct w/ out tuning the car. Mine hollowed out after a few months.

 

I got the ractive one it is just like an resonator do u think i'm loosing valuable backpressure?

 

I would like to hear some input on this too.

I'm looking at the car sound but if it's gonna get hollowed out in a little bit then I might as well just get a test pipe instead.

Any one with experience on CarSound "high flow" cats?

bump

 

on that note...is there any way to tell if its been hollowed out without removing it? smell or anything like that?

 

carsound is known for making one of the better highflow cats. I like catco as well. If your car runs too hot or too rich, it could damage the cat very easily. Some of these cats also require an airpump to functino properly. A highflow may rob you of 5whp to 30whp depending on application.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R6Elmo &raquo;</TD></TR><TR><TD CLASS="quote">carsound is known for making one of the better highflow cats. I like catco as well. If your car runs too hot or too rich, it could damage the cat very easily. Some of these cats also require an airpump to functino properly. A highflow may rob you of 5whp to 30whp depending on application. </TD></TR></TABLE>

Pretty well informed. Catco is alright, however their features lack in comparison to Carsound / Magnaflow cats. Additionally, like you mentioned, the vehicle must maintain a proper 14.7 A/F ratio for it to last as it should. Any more ?'s I'd be glad to help since I work for Magnaflow / Car Sound.

 

if you get a cel, you can get an 02 sim box, I rn one on mine cel free for almost 2 years. Now I am OBD 1 so I don't have to worry about it any more! If you want the box lemme know. I felt a loss in power when I put the stock cat back on. My top end seemed to suffer the most.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R6Elmo &raquo;</TD></TR><TR><TD CLASS="quote"> A highflow may rob you of 5whp to 30whp depending on application. </TD></TR></TABLE>

really?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackccoupe &raquo;</TD></TR><TR><TD CLASS="quote">I got the ractive one it is just like an resonator do u think i'm loosing valuable backpressure?</TD></TR></TABLE>

no such thing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bcruz &raquo;</TD></TR><TR><TD CLASS="quote">

no such thing </TD></TR></TABLE>

Actually, (let me try to explain this clearlyas possible)
Backpressure is a side effect of exhaust pressure/velocity. The bigger pipe you use the more exhaust gases cool. the hotter the exhaust the less friction is there and the faster it will flow. It is a fine line to reduce backpressure while maintaining good exhaust velocity. It is not about getting the biggest pipe and or reducing as much backpressure as possible. It is about getting a more efficient pipe diameter while maintaining exhaust velocity. Let me try to simplify this in a scenario...imagine blowing air through a straw (comparing it to a smaller diameter pipe) with your hand at the other end a little bit away from the end of the straw to feel the air releasing from the straw. This would take time to release all the air from your mouth, and you would feel pressure in your mouth while doing so. Now imagine blowing air through a paper towel roll (comparing it to a larger diameter pipe). You will relieve all your air much faster and feel little or no air pressure in your mouth & hand because of the larger capacity of the tube. This is why it is important to get the correct size piping in order to relieve backpressure while maintaining thermal efficiency.

I hope that is understandable, but its almost the end of my day

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bcruz &raquo;</TD></TR><TR><TD CLASS="quote">

no such thing </TD></TR></TABLE>

edit:

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bcruz &raquo;</TD></TR><TR><TD CLASS="quote">

edit: </TD></TR></TABLE>

Sorry, its been a crazy day for me My bad!

 

i had a hi flow and i gained hp not a lot but it was noticeable...but i noticed that i did lose some tq...so to compromise i went on a diet

 

does anybody know if the cel the secondary o2 sensor throws when you have a hi-flow cat or test pipe will put your car in limp mode? I just reset mine every couple of days just in case, but i'd like a definate answer on whether this effects performance or not. I have heard both so i would like the correct answer of the two. Anybody know?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Magnaflow &raquo;</TD></TR><TR><TD CLASS="quote">

..... since I work for Magnaflow / Car Sound.</TD></TR></TABLE>


:bowdown: Just got my Magnaflow cat back on last week and I love it.

 

Good..I gained more than 7hp with my Random Tech cat..Gotta love it and it's still emissions legal ..Actually we couldn't tell the dyno numbers from a test cat..

Random Tech=

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Magnaflow &raquo;</TD></TR><TR><TD CLASS="quote">

Any more ?'s I'd be glad to help since I work for Magnaflow / Car Sound.</TD></TR></TABLE>\

Yeah can you line me up with a free cat my random technology cat blew out after 1 month. not even 500 miles

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicNA &raquo;</TD></TR><TR><TD CLASS="quote">\

Yeah can you line me up with a free cat my random technology cat blew out after 1 month. not even 500 miles</TD></TR></TABLE>

Just get a new from Random..You have a minimum of 25000 miles/ 2 years warranty on it..

 

Im running catless because of my setup (y7 with a y8 dc header and an apexi exhaust) and Ill just say run a cat...the smell sucks....plus its a ton louder than it is with a cat.

 

They are good on the bottom end.. I punched my stock one out... YOu might feel somewhat of a dif..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Magnaflow &raquo;</TD></TR><TR><TD CLASS="quote">i learn d the same thing from the mag. site..and its all true

Actually, (let me try to explain this clearlyas possible)
Backpressure is a side effect of exhaust pressure/velocity. The bigger pipe you use the more exhaust gases cool. the hotter the exhaust the less friction is there and the faster it will flow. It is a fine line to reduce backpressure while maintaining good exhaust velocity. It is not about getting the biggest pipe and or reducing as much backpressure as possible. It is about getting a more efficient pipe diameter while maintaining exhaust velocity. Let me try to simplify this in a scenario...imagine blowing air through a straw (comparing it to a smaller diameter pipe) with your hand at the other end a little bit away from the end of the straw to feel the air releasing from the straw. This would take time to release all the air from your mouth, and you would feel pressure in your mouth while doing so. Now imagine blowing air through a paper towel roll (comparing it to a larger diameter pipe). You will relieve all your air much faster and feel little or no air pressure in your mouth & hand because of the larger capacity of the tube. This is why it is important to get the correct size piping in order to relieve backpressure while maintaining thermal efficiency.

I hope that is understandable, but its almost the end of my day </TD></TR></TABLE>

 

went from
14.9 @ 91 with stock DX cat and exhaust (mid section w/ no muffler)
to
14.4 @ 96 with 2.5 test pipe, 2.5 cat back , N1

I say let that bizzoootch flow. just adjust the a/f... you will start to run lean.