Getting a high flow catalytic converter?
09-23-11, 04:18 PM
#2
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A straight pipe. 
If your state still does emissions testing for the 7, I'd look on rx7.com or racingbeat to find something acceptable for what you are trying to do.
Also for the record the cat is not the restriction-devil that many would have you think, unless you're planning on installing a full engine-back system I wouldn't bother.
If your state still does emissions testing for the 7, I'd look on rx7.com or racingbeat to find something acceptable for what you are trying to do.
Also for the record the cat is not the restriction-devil that many would have you think, unless you're planning on installing a full engine-back system I wouldn't bother.
09-23-11, 04:28 PM
#3
metallic substrate cats are the most efficient for airflow but coversely the least efficient at actually doing the job of cleaning up emissions. that is the main reason why they are banned in california.
09-23-11, 04:36 PM
#4
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Aha... maybe that's what I was gettin at. Is that what these high flow cats on the speed shop sites are made of? (not a concern of mine really as I run a straight pipe)
09-23-11, 04:44 PM
#5
most "high flow cats" or "race cats" are simple presilencers/mufflers from the speed shops.
i have no idea who started it or why, it's a misconcept and actually a lie because they are not catalysts(cat) AT ALL!
avoid anything called a race cat, it's not a catalytic converter at all. many places still refer to high flow cats as presilencers also so be prepared to ask questions and cover your ***.
i have no idea who started it or why, it's a misconcept and actually a lie because they are not catalysts(cat) AT ALL!
avoid anything called a race cat, it's not a catalytic converter at all. many places still refer to high flow cats as presilencers also so be prepared to ask questions and cover your ***.
Last edited by RotaryEvolution; 09-23-11 at 04:46 PM.
09-23-11, 05:06 PM
#6
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Karak,
To be fair, the guys at RX7.com hold the design and used to produce (perhaps they still do) a high flow cat specifically for the requirements of an RX7. The generic "high flow cats" at indeed glorified presilencers.
To be fair, the guys at RX7.com hold the design and used to produce (perhaps they still do) a high flow cat specifically for the requirements of an RX7. The generic "high flow cats" at indeed glorified presilencers.
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09-23-11, 05:28 PM
#8
never said all suppliers do, ebay is obviously the worst for terminology. look up a race cat on there and you'll get hundreds of hits for test pipes and mufflers. it seems to be decreasing slightly, probably because of all the unsatisfied customers bitching to ebay and getting sellers banned.
Last edited by RotaryEvolution; 09-23-11 at 05:30 PM.
09-23-11, 10:42 PM
#12
+1
Put one on a big port 13B, flowed great(I have a flow bench). Shortly after we bought it Florida got rid of emission testing all together.
They had it in certain counties for a number of years and you would see cars tagged in all kinds of other counties driving around the cities and parked in driveways every evening, hmmm, wonder why that was?
Put one on a big port 13B, flowed great(I have a flow bench). Shortly after we bought it Florida got rid of emission testing all together.
They had it in certain counties for a number of years and you would see cars tagged in all kinds of other counties driving around the cities and parked in driveways every evening, hmmm, wonder why that was?
09-24-11, 11:33 AM
#15
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Wow... I have a feeling he was a teen then? I mean I'm only 18 but I still am mature enough for this to be a hobby and not a OMG LOOK AT ME I LOVE FAST AND FURRUS driver or type of person. Really a shame that one person could ruin such a respected event...
09-24-11, 04:18 PM
#16
he had some moronic stickers on his car "smogpolluter" or some **** like that, had straightpiped exhaust and was racing his car around the side streets before the event.
the car sounded like complete *** because of the lack of any muffler whatsoever, it was a very poor example for the rotary community and made me a little ashamed to own my car.
this was back during SS7 or 8, i can't recall which exactly. the stickers made me think that his intention was to give the cars a bad name along with his zip tied together dash and gutted interior. the car was slower than stock btw, due to the ill performed modifications. made me think of the majority of honda owners. hopefully he blew up the motor and disappeared because that was the last i saw of it(perhaps reffed/towed because the sticker was to a website called smogpolluter.com), but i do recall the name on the forum around that time as well.
the kid was just a straight up attention *****, that is all.
the car sounded like complete *** because of the lack of any muffler whatsoever, it was a very poor example for the rotary community and made me a little ashamed to own my car.
this was back during SS7 or 8, i can't recall which exactly. the stickers made me think that his intention was to give the cars a bad name along with his zip tied together dash and gutted interior. the car was slower than stock btw, due to the ill performed modifications. made me think of the majority of honda owners. hopefully he blew up the motor and disappeared because that was the last i saw of it(perhaps reffed/towed because the sticker was to a website called smogpolluter.com), but i do recall the name on the forum around that time as well.
the kid was just a straight up attention *****, that is all.
Last edited by RotaryEvolution; 09-24-11 at 04:24 PM.
09-26-11, 10:13 AM
#18
I run a magnaflow cat on my 7. I couldn't be happier Passed emissions with flying colors, and the exhaust tone is well reserved. Not sure how much they adversely affect air flow, but from a lot of people I talked to, (some even did flow tests) CATS are far less restrictive than they used to be.
Passed emissions with flying colors, and the exhaust tone is well reserved. Not sure how much they adversely affect air flow, but from a lot of people I talked to, (some even did flow tests) CATS are far less restrictive than they used to be.
09-26-11, 11:31 AM
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I run a magnaflow cat on my 7. I couldn't be happier Passed emissions with flying colors, and the exhaust tone is well reserved. Not sure how much they adversely affect air flow, but from a lot of people I talked to, (some even did flow tests) CATS are far less restrictive than they used to be.
Passed emissions with flying colors, and the exhaust tone is well reserved. Not sure how much they adversely affect air flow, but from a lot of people I talked to, (some even did flow tests) CATS are far less restrictive than they used to be.if you compared the core size of the stock cat with the after market you can see that the factory cat is also way bigger.
the metallic cat flow more because the substrate is thinner than the ceramic
09-26-11, 12:38 PM
#20
^^ true.
i have a 2.5 bonez high flow cat (from rx7.com) to a 2.5 corksport exhaust, sounds great, gain a few hp and not to loud or annoying. gonna get a rb hearders and test pipe cause it sounds real nice, not as loud as i thought and get some good gains too
i have a 2.5 bonez high flow cat (from rx7.com) to a 2.5 corksport exhaust, sounds great, gain a few hp and not to loud or annoying. gonna get a rb hearders and test pipe cause it sounds real nice, not as loud as i thought and get some good gains too
09-26-11, 01:51 PM
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you can google it (i did!) but factory cats need to have a density in the 1200 somethings per something area, but aftermarkets are 600, so there's less "stuff" in an aftermarket cat, so basically every aftermarket cat is high flow.
if you compared the core size of the stock cat with the after market you can see that the factory cat is also way bigger.
the metallic cat flow more because the substrate is thinner than the ceramic
if you compared the core size of the stock cat with the after market you can see that the factory cat is also way bigger.
the metallic cat flow more because the substrate is thinner than the ceramic
09-26-11, 03:05 PM
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