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Old 12-22-2003, 06:59 PM   #1
BMW_7
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Catalytic converteres?

I was reading Performance BMW the other day and I thought I saw a E36 318 in there, with aftermarket cats? And it had 180 hp. I think there were some bolt-ons but I am not sure. Is this possible?

I know 1BADBMW has no cats, but does anyone have a car without them? I know some civic and cavalier owners take them off..
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Old 12-22-2003, 08:13 PM   #2
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it should give u more mid to high end power cause its alot more free flowing
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Old 12-23-2003, 02:47 AM   #3
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I had NO cat on my car at one point.. and the performance was significantly better! You could safely say that with no cat and a "free flowing" 2 inch exhaust system.. that should be good for a 10 hp increase

But you could smell that it had no cat.. expecially at the drive through..

If you are going to replace the cat use a round style, a small one maybe 8" long by 4 or 5 inch diameter. cause the larger cats (made for chevy 5.7 litre) don't heat up as quickly. an use the largest resinator you can find

Here is my setup.. 3rd attempt and i finally got it right!
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Old 12-23-2003, 10:05 PM   #4
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I'm currently running with now cat, well almost. My cat burned up and now I'm pretty much free flowing except for the restrictive muffler. I have noticed a significant increase in power with the exspense of noise level and what the other person said, smell. If I hit it necks will snap around but at cruise drows little attention. Also wiether bad or good my car now idles higher; instead of 750-900 now 900-1250. While in motion you can't smell the fumes, obviously but once at idle they began to build and annoy the senses, eyes and nose for me.
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Old 12-23-2003, 10:08 PM   #5
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I'm I thought resinators were for racing?
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Old 12-24-2003, 04:10 AM   #6
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Nah strait pipes are for racing

Usually a resinator has no chambers inside, so it's free flowing and it usually is smaller with less weight. I guess thats why it would be used in a race car.. but they also work great to "pre muffle" the sound before it reaches the muffler and smoth out the sound a little

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Old 12-25-2003, 06:11 AM   #7
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Really. I guess that's why so race cars are so loud and why so many spit fire. Learning something new everyday...
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Old 12-25-2003, 07:21 AM   #8
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having no cats or res will make me backfire? things get better from day to day!
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Old 12-25-2003, 08:36 AM   #9
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Quote:
Originally posted by E46_lover
having no cats or res will make me backfire? things get better from day to day!
eating pork and beans with beer, will make you backfire!
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Old 12-25-2003, 08:56 PM   #10
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My cousin doesnt have any cats on his E30 M3. I wouldnt recommend it. I was driving behind him and could totally tell, because it smelled so bad. Also when you are in the car, you get a headache beacuse it is so damn loud. Also you have to worry about emissions after. It really isnt practical.
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Old 12-25-2003, 10:59 PM   #11
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I kinda liked it.. smelt like a muscle car!

but the headaches were pretty annoying if you wern't moving

I think i lost a few extra brain cells
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Old 12-26-2003, 06:22 AM   #12
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Well smell may depend on which octane of gas your using. I've personally noticed that 85/89 octane produces a louder more irritating smell than say 93 octane.

To the other poster your right it does produce a more muscle car like smell, which is why I love the older Mustangs, Chevys, and Ford Trucks.

I just thought about something would a magnaflow cat produce the same effects/affects as a no cats?
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Old 12-30-2003, 04:16 AM   #13
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what about running without a resonator? Is that a good idea?
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