hi flow cat for my new Blacktop SR20DET..which one - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

180sxdude · 10-28-2002, 06:30 PM

anyone have any suggestions for the best 3" hi flow cat I can get for my new SR20DET??? thanks

*Grant* · 10-28-2002, 06:57 PM

Random Technologies make really nice ones, but it costs a lot of money.

uiuc240 · 10-28-2002, 07:01 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (180sxdude @ Oct. 28 2002,7:30)</td></tr><tr><td id="QUOTE">anyone have any suggestions for the best 3" hi flow cat I can get for my new SR20DET??? thanks</td></tr></table><span id='postcolor'>
Rollhard Performance 3" CarSound cat:

http://www.rollhard.com/rpcats.htm

Eric

P.S.  Remember to buy two 3" flanges and two gaskets for the install, have it welded up at a muffler shop, and then tell me how it is (since I'm going to get one soon).

GamblerZ · 10-28-2002, 09:40 PM

Is a "gutted" cat an option?

uiuc240 · 10-28-2002, 09:48 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (GamblerZ @ Oct. 28 2002,10:40)</td></tr><tr><td id="QUOTE">Is a "gutted" cat an option?</td></tr></table><span id='postcolor'>
That is such a lame solution.  For ~$60 you can have a 3" test pipe from Heavy Throttle if you really don't care about the environment.  At least this solution won't cause weird turbulence in the air stream (like a gutted cat will) and it will sound nice.

But personally, for $120 for the CarSound cat and $20 worth of seals and flanges, $10 for bolts and another ~$35 to have it welded up, you can have high flow and decent emissions.  

Let's try and at least make an effort for some type of social conscience.  It's bad enough that we have no problem turning up the boost and sucking mass amounts of fuel into the engine.  But at least the exhaust can get cleaned a bit.

OK?

Eric - your local tree-hugger/car-fanatic

GamblerZ · 10-28-2002, 10:34 PM

Good grief!  Take a pill.  It was merely a simple, low-cost alternative.  You preach to me about emissions, yet you have performed(as I <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/devil.gif" border="0" valign="absmiddle" alt=':devil:'> ) an SR-swap which is technically not emissions legal in most states, nor do I think you went to all the trouble to ensure that it was.

Meanwhile, a conventional lawn mower or BBQ grill puts out more emissions than two cars combined.

So rather than policing others, practice what you preach...instead of "do as I say, not as I do".

luke91 · 10-28-2002, 11:09 PM

Why don't you just have a muffler shop weld you one for about $20 bucks?  You can buy the necessary flanges at Pep Boys.  
About the environment - that's just what people say to make you feel bad about not using a cat.  What, it's OK for race cars to do it, but not us?  Balderdash!!    <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/mad.gif" border="0" valign="absmiddle" alt=':angry:'>

huevos · 10-29-2002, 07:13 PM

try summitracing.com
they have highflow 3" cats for ~$70

uiuc240 · 10-29-2002, 07:46 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (GamblerZ @ Oct. 28 2002,11:34)</td></tr><tr><td id="QUOTE">Good grief! Take a pill. It was merely a simple, low-cost alternative. You preach to me about emissions, yet you have performed(as I <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/devil.gif" border="0" valign="absmiddle" alt=':devil:'> ) an SR-swap which is technically not emissions legal in most states, nor do I think you went to all the trouble to ensure that it was.

Meanwhile, a conventional lawn mower or BBQ grill puts out more emissions than two cars combined.

So rather than policing others, practice what you preach...instead of "do as I say, not as I do".</td></tr></table><span id='postcolor'>
True that.  However, I can tell you right now that my SR with cat is no "smellier" than my KA was.  And definitely less smelly than no-cat cars running around town.  Oh, and there are no emissions req's in my part of Illinois, so I could ditch the cat with no worries.  I just think it's sooo easy to just run one, that it would grate on my conscience if I didn't.

I'm taking a Midol now.  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/laugh.gif" border="0" valign="absmiddle" alt=':laugh:'> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/baaa.gif" border="0" valign="absmiddle" alt=':baaa:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/yin-yang.gif" border="0" valign="absmiddle" alt=':yingyang:'>

Eric

uiuc240 · 10-29-2002, 07:49 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (luke91 @ Oct. 29 2002,12:09)</td></tr><tr><td id="QUOTE">
About the environment - that's just what people say to make you feel bad about not using a cat. What, it's OK for race cars to do it, but not us? Balderdash!! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/mad.gif" border="0" valign="absmiddle" alt=':angry:'></td></tr></table><span id='postcolor'>
Typically 'Merican response

i.e. "I drive an SUV because I can"  "I own a gun because I can"   But does that make it right?

Point is, someone has to have a social conscience...obviously you don't.  No biggie.  But I'm going to try and preach anyway.

As for race cars...they pollute in VERY small percentages...they aren't being driven to soccer practice.  And, they operate at high temps (where engines are efficient anyway).  That's why street cars need cats.  You're not always driving a hot engine.

End.

Eric

drift freaq · 10-29-2002, 08:40 PM

one comment in all of this. Everyone who suggests not using a cat to cut down on tailpipe emissions or does just that adds to the problem.
I agree with UIUC . People are always lamenting California smog laws but guess what we have cleaner air because of it. Guess what else a properly tuned SR with a cat will pass tailpipe emissions tests here in California. It just won't pass visual .
So for any of you trying to justify your desire to pollute, with the reasoning that people are running SR's and they pollute because they are not legal , well that is just wrong. Its also a very lame excuse for not wanting to take responsibilty. A very common American trait.
If they do it its ok for me to do. rationalizations at best folks.
that said get a carsound high flow cat they work well and are affordable.

luke91 · 10-30-2002, 01:02 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Point is, someone has to have a social conscience...obviously you don't.</td></tr></table><span id='postcolor'>

So now I have no social conscience because I don't use a cat on my SR20DET powered 240sx.  Makes perfect sense.  

I don't use a cat because modern engines (especially high performance, turbo engines) were never meant to work in conjunction with them.  They are an effective way to reduce emissions, but they still obstruct exhaust flow,  plain and simple.  

If you're going to spend the time and money modifying your engine, then you're going to do what's best for it, and that's NOT using a cat.

You mean to tell me that if the California Air Resource Board decides that it won't require cats on cars anymore, you'll still use one just because they're environmentally sound?  

Furthermore, my descision not to use a cat on my SR20 isn't the "typical 'merican response', partly because most Americans do not drive SR20 swapped 240's, and partly because I still have the factory on my daily beater, an '89 civic, and wouldn't  remove it even if I legally could.  I have no reason to.  

</td></tr></table><span id='postcolor'>As for race cars...they pollute in VERY small percentages...they aren't being driven to soccer practice. And, they operate at high temps (where engines are efficient anyway). </span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">

So turbo motors don't run hot?  

--luke

xLSTONEx · 10-30-2002, 08:04 AM

haha this is halrious, but who cares if your car can pass emissions or not. Its not going to hurt anything, Green House Effect isn't real buddy. All you liberals care about the trees and squirels more than yourself. Absolutly no trees, or squirels will die if you take off your cat. If i were you I would just go get a test pipe at a muffler shop and get them to put it on. It will give you a good increase in HP too, for sure in a turbo car. The only bad effect will be a bad smell that you won't even be to notice unless you are right at your exhaust. So if I offended anyone sorry, but the enviroment is the least of my concern. Peace.

10-28-2002, 07:01 PM	#3
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (180sxdude @ Oct. 28 2002,7:30)</td></tr><tr><td id="QUOTE">anyone have any suggestions for the best 3" hi flow cat I can get for my new SR20DET??? thanks</td></tr></table><span id='postcolor'> Rollhard Performance 3" CarSound cat: http://www.rollhard.com/rpcats.htm Eric P.S.  Remember to buy two 3" flanges and two gaskets for the install, have it welded up at a muffler shop, and then tell me how it is (since I'm going to get one soon). __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

10-28-2002, 09:40 PM	#4
GamblerZ Zilvia Junkie Join Date: Aug 2002 Location: West Texas Posts: 414 Trader Rating: (1) Feedback Score: 1 reviews	Is a "gutted" cat an option? __________________ Visit WTI - WestTexasImports.net

10-28-2002, 09:48 PM	#5
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (GamblerZ @ Oct. 28 2002,10:40)</td></tr><tr><td id="QUOTE">Is a "gutted" cat an option?</td></tr></table><span id='postcolor'> That is such a lame solution.  For ~$60 you can have a 3" test pipe from Heavy Throttle if you really don't care about the environment.  At least this solution won't cause weird turbulence in the air stream (like a gutted cat will) and it will sound nice. But personally, for $120 for the CarSound cat and $20 worth of seals and flanges, $10 for bolts and another ~$35 to have it welded up, you can have high flow and decent emissions.   Let's try and at least make an effort for some type of social conscience.  It's bad enough that we have no problem turning up the boost and sucking mass amounts of fuel into the engine.  But at least the exhaust can get cleaned a bit. OK? Eric - your local tree-hugger/car-fanatic __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

10-28-2002, 10:34 PM	#6
GamblerZ Zilvia Junkie Join Date: Aug 2002 Location: West Texas Posts: 414 Trader Rating: (1) Feedback Score: 1 reviews	Good grief!  Take a pill.  It was merely a simple, low-cost alternative.  You preach to me about emissions, yet you have performed(as I <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/devil.gif" border="0" valign="absmiddle" alt=':devil:'> ) an SR-swap which is technically not emissions legal in most states, nor do I think you went to all the trouble to ensure that it was. Meanwhile, a conventional lawn mower or BBQ grill puts out more emissions than two cars combined. So rather than policing others, practice what you preach...instead of "do as I say, not as I do". __________________ Visit WTI - WestTexasImports.net

10-28-2002, 11:09 PM	#7
luke91 Zilvia Member Join Date: Sep 2002 Location: Pittsburgh, PA Age: 44 Posts: 218 Trader Rating: (0) Feedback Score: 0 reviews	Why don't you just have a muffler shop weld you one for about $20 bucks?  You can buy the necessary flanges at Pep Boys.   About the environment - that's just what people say to make you feel bad about not using a cat.  What, it's OK for race cars to do it, but not us?  Balderdash!!    <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/mad.gif" border="0" valign="absmiddle" alt=':angry:'> __________________ '91 fastback.  '97 S13 blktop SR20DET.  Cstm Frnt Mnt IC w/ cstm 2 1/2" piping.  stnls stl fltr.  3" cstm DP & exhst w/N1 muff.  Walbro FP.  ACT 6 pck cltch.  Go Fast Bits crnk plly.  Ground Control coils.  KYB AGX shks.  12.98@106 w/g-tech pro.  17psi.  All work and fabrication done by ME

10-28-2002, 06:30 PM	#1
180sxdude Leaky Injector Join Date: Oct 2002 Posts: 53 Trader Rating: (0) Feedback Score: 0 reviews	anyone have any suggestions for the best 3" hi flow cat I can get for my new SR20DET??? thanks

10-28-2002, 06:57 PM	#2
Grant Premium Member Join Date: Jun 2001 Location: 聖地牙哥 Posts: 2,647 Trader Rating: (0) Rides Gallery: Grant Feedback Score: 0 reviews	Random Technologies make really nice ones, but it costs a lot of money.

10-29-2002, 07:13 PM	#8
huevos Leaky Injector Join Date: Jul 2002 Location: Spokane Age: 42 Posts: 64 Trader Rating: (0) Feedback Score: 0 reviews	try summitracing.com they have highflow 3" cats for ~$70

10-29-2002, 07:46 PM	#9
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (GamblerZ @ Oct. 28 2002,11:34)</td></tr><tr><td id="QUOTE">Good grief! Take a pill. It was merely a simple, low-cost alternative. You preach to me about emissions, yet you have performed(as I <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/devil.gif" border="0" valign="absmiddle" alt=':devil:'> ) an SR-swap which is technically not emissions legal in most states, nor do I think you went to all the trouble to ensure that it was. Meanwhile, a conventional lawn mower or BBQ grill puts out more emissions than two cars combined. So rather than policing others, practice what you preach...instead of "do as I say, not as I do".</td></tr></table><span id='postcolor'> True that.  However, I can tell you right now that my SR with cat is no "smellier" than my KA was.  And definitely less smelly than no-cat cars running around town.  Oh, and there are no emissions req's in my part of Illinois, so I could ditch the cat with no worries.  I just think it's sooo easy to just run one, that it would grate on my conscience if I didn't. I'm taking a Midol now.  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/laugh.gif" border="0" valign="absmiddle" alt=':laugh:'> <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/baaa.gif" border="0" valign="absmiddle" alt=':baaa:'>  <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/yin-yang.gif" border="0" valign="absmiddle" alt=':yingyang:'> Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

10-29-2002, 07:49 PM	#10
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (luke91 @ Oct. 29 2002,12:09)</td></tr><tr><td id="QUOTE"> About the environment - that's just what people say to make you feel bad about not using a cat. What, it's OK for race cars to do it, but not us? Balderdash!! <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/mad.gif" border="0" valign="absmiddle" alt=':angry:'></td></tr></table><span id='postcolor'> Typically 'Merican response i.e. "I drive an SUV because I can"  "I own a gun because I can"   But does that make it right? Point is, someone has to have a social conscience...obviously you don't.  No biggie.  But I'm going to try and preach anyway. As for race cars...they pollute in VERY small percentages...they aren't being driven to soccer practice.  And, they operate at high temps (where engines are efficient anyway).  That's why street cars need cats.  You're not always driving a hot engine. End. Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

10-29-2002, 08:40 PM	#11
drift freaq R.I.P. Aya, always love Join Date: Nov 2001 Location: Los Feliz/Hollywood Posts: 18,564 Trader Rating: (215) Rides Gallery: drift freaq Feedback Score: 215 reviews	one comment in all of this. Everyone who suggests not using a cat to cut down on tailpipe emissions or does just that adds to the problem. I agree with UIUC . People are always lamenting California smog laws but guess what we have cleaner air because of it. Guess what else a properly tuned SR with a cat will pass tailpipe emissions tests here in California. It just won't pass visual . So for any of you trying to justify your desire to pollute, with the reasoning that people are running SR's and they pollute because they are not legal , well that is just wrong. Its also a very lame excuse for not wanting to take responsibilty. A very common American trait. If they do it its ok for me to do. rationalizations at best folks. that said get a carsound high flow cat they work well and are affordable. __________________ "Having a lot of tracks on a song is like putting stickers on a car to get more horsepower" New Video https://www.youtube.com/watch?v=uebV1OnbRsw Buy my mounts! http://zilvia.net/f/sale-items/51531...ns-mounts.html http://zilvia.net/f/tech-talk/317539...e-mouts-6.html

10-30-2002, 01:02 AM	#12
luke91 Zilvia Member Join Date: Sep 2002 Location: Pittsburgh, PA Age: 44 Posts: 218 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Point is, someone has to have a social conscience...obviously you don't.</td></tr></table><span id='postcolor'> So now I have no social conscience because I don't use a cat on my SR20DET powered 240sx.  Makes perfect sense.   I don't use a cat because modern engines (especially high performance, turbo engines) were never meant to work in conjunction with them.  They are an effective way to reduce emissions, but they still obstruct exhaust flow,  plain and simple.   If you're going to spend the time and money modifying your engine, then you're going to do what's best for it, and that's NOT using a cat. You mean to tell me that if the California Air Resource Board decides that it won't require cats on cars anymore, you'll still use one just because they're environmentally sound?   Furthermore, my descision not to use a cat on my SR20 isn't the "typical 'merican response', partly because most Americans do not drive SR20 swapped 240's, and partly because I still have the factory on my daily beater, an '89 civic, and wouldn't  remove it even if I legally could.  I have no reason to.   </td></tr></table><span id='postcolor'>As for race cars...they pollute in VERY small percentages...they aren't being driven to soccer practice. And, they operate at high temps (where engines are efficient anyway). </span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE"> So turbo motors don't run hot?   --luke __________________ '91 fastback.  '97 S13 blktop SR20DET.  Cstm Frnt Mnt IC w/ cstm 2 1/2" piping.  stnls stl fltr.  3" cstm DP & exhst w/N1 muff.  Walbro FP.  ACT 6 pck cltch.  Go Fast Bits crnk plly.  Ground Control coils.  KYB AGX shks.  12.98@106 w/g-tech pro.  17psi.  All work and fabrication done by ME

10-30-2002, 08:04 AM	#13
xLSTONEx BANNED Join Date: Jul 2001 Location: Kennesaw, GA Age: 39 Posts: 390 Trader Rating: (0) Feedback Score: 0 reviews	haha this is halrious, but who cares if your car can pass emissions or not. Its not going to hurt anything, Green House Effect isn't real buddy. All you liberals care about the trees and squirels more than yourself. Absolutly no trees, or squirels will die if you take off your cat. If i were you I would just go get a test pipe at a muffler shop and get them to put it on. It will give you a good increase in HP too, for sure in a turbo car. The only bad effect will be a bad smell that you won't even be to notice unless you are right at your exhaust. So if I offended anyone sorry, but the enviroment is the least of my concern. Peace.