Set of catalytic converters that work with F/I?

[Miracle]

Is there anybody that knows of a set of cats that won't eat themselves on these cars that are supercharged? I don't like my car as much without them... the exhaust is way too raspy and it has a sort of rice-y sounding buzz to it now when it is not warmed up all the way. My AFRs are aging crazy so I know I need a tune... but I just generally want to like driving my car again. Any chance of running cats again, without having to worry about them failing or making me lose a motor like a few others have done?

Sent from my Inspire 4G using tapatalk.

 

[Chiron]

With F/I, you'll want to run some metallic cats, like these: http://www.brenspeed.com/cvm11k.html

 

[Miracle]

Can anybody confirm? I don't really know different types of cats were available.... any ideas?

Sent from my Inspire 4G using tapatalk.

 

[Chiron]

When you choose cats, you have to consider a few different things. Metallic vs Ceramic, cell #'s, flow rate, etc. Metallic cats will give you a slightly "tinny" sound, but they're much more durable and will hold up to the flow of a F/I setup better than ceramic. There have been quite a few people that have blown their motors due to ceramic cats shittin' themselves with a blower, but that's not to say that a metallic won't do the same.

 

[frarmar]

I didn't like the catless sound so much either... ended up putting some resonators on and it sounded soooo much better.

http://www.summitracing.com/parts/WLK-24215/

 

[S197gt07]

I didn't like the catless sound so much either... ended up putting some resonators on and it sounded soooo much better.

http://www.summitracing.com/parts/WLK-24215/

+1. Had an O/R H and stingers and wasn't a huge fan. Put in some resonators from JPC and it made it sound 10x better.

 

[BruceH]

stock cats

 

[Charlie Sheen]

stock cats

What he said.

 

[fdjizm]

Stock cats with no two step should be fine.

 

[Miracle]

Is there a way to get stock cats on an aftermarket crossover?

Sent from my Inspire 4G using tapatalk.

 

[SteveP]

Stock cats with no two step should be fine.

Def not true. I see stock cats blow a lot quicker

 

[fdjizm]

With just FI? o.0 I don't trust cats at all but they say and this is just what "they" say that they hold up better than some aftermarket cats, mainly kooks failure of a cat. lol

 

[SteveP]

i went through 3 sets of bassani cats in 1 month.

be smart, don't run cats.

 

[Liberty911]

I don't like my car as much without them... the exhaust is way too raspy and it has a sort of rice-y sounding buzz to it now when it is not warmed up all the way.

I had the same issue when I went from Kooks cats to an O/R X pipe with Flowmasters. Way to loud, raspy and obnoxious. I replaced the flowmasters with OEM Bullit muffers and it sounds way better. Really toned down the rasp. I had a set or resonators to weld in, but didn't want to add more weight when I could just replace the mufflers.

 

[Riptide]

Wonder what is so special about these cars that they can't run cats with FI. Lotsa other cars out there are able to get away with it.

 

[BruceH]

Wonder what is so special about these cars that they can't run cats with FI. Lotsa other cars out there are able to get away with it.

I ran stock cats for 2 and half years with a Whipple. No problems and the cats are still good.

 

[Riptide]

Mine are fine as well so far and I've never read about a stock cat failure on here. But I guess bbr has seen them go. Maybe a lean tune? Who knows.


Sent from my iPhone using Tapatwat

 

[TexasBlownV8]

Using magnaflow hi-flow's for a few years now, no issues.

 

[retfr8flyr]

I don't think it's a lean condition but a rich one that burns up the cats. With the average 11.5 area that FI tunes run the cats get so hot they self destruct. As posted the metal cats hold up a little better than the ceramic ones but you are better off without cats if you are FI.


Earl

 

[Legend Shaker]

I don't think it's a lean condition but a rich one that burns up the cats.

Earl

Jim III at JDM has mentioned this to me also. Tune is very important if you are required to run with cats and FI.