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| Campbell18 |
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g'day guys, Iv been running the standard cat with pacey 4480's and an auspac catback for the last year or so. Car makes a great sound, nice and deep and doesnt drone however the cat just shat itself.
Im looking at a hi flow , but im not sure whether or not to go 100 or 200cpi. Someone mentioned that the 100 sounds slightly more tinny? cheers
_________________ ED 4.0L auto... pacemaker PH4480, Aus Pac Catback exhaust, wade 1636 with j3 tune =130rwkw |
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| Campbell18 |
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glad to hear im not the only one mate
 I was just gonna go the 100cpi because its the best flowing but i dont want to ruin the exhaust note at the same time
_________________ ED 4.0L auto... pacemaker PH4480, Aus Pac Catback exhaust, wade 1636 with j3 tune =130rwkw |
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| Papa Smurf |
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The 100cpi Cat is illegal.
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| 89.SVO |
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Age: 35 Posts: 3382 Joined: 11th Mar 2008 Ride: EA SVO, AU2, Toyota Crown Location: Bendigo |
i just had a 2.5" mandrel bent cat back with 1 muffler, standard cat and standard manifold. sounded good.
but then i got a set of extractors. was gunna just fit them with the standard cat, but turns out the catalyst had cracked. so i got a 100cpi cat fitted. then over 2500rpm it sounded like one of those B&S utes with no exhaust, terrible so i had to get a resonator fitted. but now it sounds good again. and goes alot better. the moral to my rambling is it may make it sound a bit tinny. so be prepared to maybe have to install another small resonator
_________________ Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw. |
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| TROYMAN |
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the 100 cpi cat is a cat you have when you dont really want a cat..lol
100cpi is illegal, and your exhaust will almost smell like it has no cat, i know mine does.. imo a std 2 1/2" or even a 3" cat is enough for a std or slightly modified 4.0l.. if you want the "i got a high flow cat image" then the 200 cpi will do the job.. 100 cpi is really only good for boosted applications, in some cases overkill.. |
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| Campbell18 |
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cheers for the responses guys, i got quoted $260 for a 200cpi redback today so it looks like that might be the go.
Hopefully it doesnt alter the note to much
_________________ ED 4.0L auto... pacemaker PH4480, Aus Pac Catback exhaust, wade 1636 with j3 tune =130rwkw |
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| TROYMAN |
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why not try venom exhaust works, they are a site sponser,
there 2 1/2" 200cpi cat is $180. ive had better results with these cats then i have with other more expecsive cats.. venom-exhaust-works-f74/venom-high-flow-cats-t96173.html |
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| Papa Smurf |
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TROYMAN wrote: why not try venom exhaust works, they are a site sponser, there 2 1/2" 200cpi cat is $180. ive had better results with these cats then i have with other more expecsive cats.. venom-exhaust-works-f74/venom-high-flow-cats-t96173.html And yet, Joe from CMS recommends Magnaflow? http://www.magnaflow.com/ |
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| TROYMAN |
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Papa Smurf wrote: TROYMAN wrote: why not try venom exhaust works, they are a site sponser, there 2 1/2" 200cpi cat is $180. ive had better results with these cats then i have with other more expecsive cats.. venom-exhaust-works-f74/venom-high-flow-cats-t96173.html And yet, Joe from CMS recommends Magnaflow? http://www.magnaflow.com/ im not keen on the magnaflows..the last 2 magnaflow metal cats i had fell apart, the last ones center become dislodged and blocked my exhaust 1 week after its 12 month warranty expired, might be a differnt story for a n/a application... so i opted to try the venom cat.. more than a year later and still good. 
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| 89.SVO |
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Age: 35 Posts: 3382 Joined: 11th Mar 2008 Ride: EA SVO, AU2, Toyota Crown Location: Bendigo |
yeh. my exhaust stinks lol. but i just did it for the high flow lol.
_________________ Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw. |
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| Dansedgli |
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My 100 cell cat didnt stink.
Everyone said they already smelled bad so I ripped it out and it was much, much worse. The free 20rwkw was nice though.
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| Michael (HYPOEB) |
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Wouldnt a 3" cat on a 2.5" exhaust flow abit better?
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| 89.SVO |
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Age: 35 Posts: 3382 Joined: 11th Mar 2008 Ride: EA SVO, AU2, Toyota Crown Location: Bendigo |
yeh. until it hits the 2.5" exhaust. lol
_________________ Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw. |
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| Waggin |
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WILDEB wrote: yeh. until it hits the 2.5" exhaust. lol And there's the backpressure that you wanted
_________________ WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build] |
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| 89.SVO |
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Age: 35 Posts: 3382 Joined: 11th Mar 2008 Ride: EA SVO, AU2, Toyota Crown Location: Bendigo |
Waggin wrote: WILDEB wrote: yeh. until it hits the 2.5" exhaust. lol And there's the backpressure that you wanted may as well just get the 2.5" inlet-2.5" outlet type i have. but the body and catalyst on the inside is about 4"
_________________ Daily driver: 2010 Toyota Crown hybrid 3.5L V6 hybrid. 254kw. |
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