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BF330ci
04-13-2006, 04:24 PM
Anyone know of an alternative to supersprints Racing cat? maybe something by technik? or some other alternative other than an O2 simulator?
omes
04-13-2006, 07:11 PM
Hey man,

I have been following your last thread a bit.

I was going to try the O2 Sims from baker elect. actually bought it and had it on very good authority that the wouldn't work.

My car was far to raspy with my initial exhaust set up, SS Header, SS X-Pipe, Rear Resonator and SS Muffler. I also have an ASA SK1 SC.

This is what I did:

http://forum.e46fanatics.com/showthread.php?t=204306&highlight=omes+cats+vibrant


PM me if you want anymore pics.

Basically I just welded in 2 high flow racing cats into the SS X Pipe, and extended the O2 Sensor wires.

Since you are straight piped you should have no issue at all, just go to any parts store and ask for high flow racing cats, I went with vibrants...........just make sure the inlet outlet piping is the same, mine even came with bungs behind the cat.

Took away the rasp, I was so impressed, my exhaust sound perfect now......just tuned.

Good Luck.

Omes.
beanfree
04-13-2006, 11:40 PM
Technic has a cat for their headers. Contact them.
Marshall
04-14-2006, 02:03 AM
Would hollowing out your OEM cat generate a cell to the post O2 sensor?
bernstem
04-14-2006, 12:20 PM
Would hollowing out your OEM cat generate a cell to the post O2 sensor?

Yes
BF330ci
04-17-2006, 07:16 PM
Thanks alot omes...how much did those cats run you? i was actually comtemplaing taking my headers off bc the sound was way too F-ing loud...i cant take it some times...do you have a sound clip of it that i can hear? is the car loud or is it a nice (more than subtle) accent to the ride? i am really desperate for a solution to this...also where did you purchase those cats from? online source or local shop?
Thanks again for the info!! much appreciated
Stealthwagen
04-18-2006, 04:18 PM
I have a pair of Random Tech metallic core race cats for sale. 2 1/4" in/out, stainless body. Brand new in box. $400 shipped.

176253
BF330ci
04-18-2006, 09:50 PM
Thanks for the offer Stealhwagen, but i already spoke with my local shop and he is setting something up for me...i appreciate the offer though! good luck with the sale!
Stealthwagen
04-18-2006, 10:33 PM
No Prob. Have fun with your project & thanks for the reply.
BF330ci
04-18-2006, 11:39 PM
Thanks! i will keep you guys posted on what i am doing and make sure i post some pics
omes
04-20-2006, 10:28 AM
Thanks alot omes...how much did those cats run you? i was actually comtemplaing taking my headers off bc the sound was way too F-ing loud...i cant take it some times...do you have a sound clip of it that i can hear? is the car loud or is it a nice (more than subtle) accent to the ride? i am really desperate for a solution to this...also where did you purchase those cats from? online source or local shop?
Thanks again for the info!! much appreciated


Hey Man,

Got your pm, sorry it has taken me so long to reply.

Cats were about $150 each (x2) and it was about $300 to install it was alot of work extending the 02 sensor wires ect. I got them from a local performance shop, specializing in mostly big block stuff, if you want i can email you a short video clip.
Made the world of difference in the way the car sounded and no CEL's from missing cats......ect.
david05111
04-20-2006, 04:04 PM
Doesn't Supersprint offer race cats?
KP
04-20-2006, 04:58 PM
Doesn't Supersprint offer race cats?

yes, it's what I had on my car. Costs a pretty penny though...
GBX330ci
04-20-2006, 05:02 PM
Hey Man,

Got your pm, sorry it has taken me so long to reply.

Cats were about $150 each (x2) and it was about $300 to install it was alot of work extending the 02 sensor wires ect. I got them from a local performance shop, specializing in mostly big block stuff, if you want i can email you a short video clip.
Made the world of difference in the way the car sounded and no CEL's from missing cats......ect.

omes, i'd love to hear that video clip. Can you post it or email it to me?

Thanks!
JC7727
04-20-2006, 05:47 PM
I have technik headers -> Magnaflow Cat (1st resonator removed) -> 2nd stock resonator -> Eisenmann Race Muffler. Sounds very good and unique.
KP
04-20-2006, 09:39 PM
The cats should help quiten down some of the sound too if it's too loud for you.

Here's a video clip of my car with SS headers/race cats+RE DMS Exhaust:

http://video.google.com/videoplay?docid=4833032131987100879
MrBlonde
04-23-2006, 04:19 PM
Racecars don't use cats. There's no such thing as a race cat.
Mike Benvo
04-23-2006, 06:14 PM
Racecars don't use cats. There's no such thing as a race cat.


"Racing Cat" as in a high performance cat that can tolerate higher octane fuels without burning out.

But yes as you said, racecars (and my car :shhh:) are not equipped with cats.
MrBlonde
04-23-2006, 11:00 PM
"Racing Cat" as in a high performance cat that can tolerate higher octane fuels without burning out.

But yes as you said, racecars (and my car :shhh:) are not equipped with cats.
Hehe, I get you Mike.

You can get high flow cats that have fewer cells and present less of a restriction .. I've seen 5" cats which don't look to block things up much.

But any leaded fuel will destroy cats (and O2 sensors) before too long.

On my car I have flanged sections on the exhaust so I can remove the cats and replace them with a shotgun pipe section for race day and bolt the cats back on for street driving.