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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E30 (1982 - 1993)

E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 01-13-2013, 06:10 PM
87bmw e30 87bmw e30 is offline
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Mein Auto: 1987 bmw 325e
325e cat removal

I want to take the cat off my car, its a 1987 325e, what till removing the cat do for my engine, thanks
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  #2  
Old 01-13-2013, 07:12 PM
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E30-325 E30-325 is offline
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nothing. the power your car makes, makes removing your cat pointless. stop it.
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  #3  
Old 01-13-2013, 07:16 PM
Titan_Omega Titan_Omega is offline
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all removing your cat will do is save a little weight to be honest.
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  #4  
Old 01-13-2013, 09:46 PM
87bmw e30 87bmw e30 is offline
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Thanks, im not looking for any performance, i was just wondering if it would harm the engine at all.
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  #5  
Old 01-14-2013, 07:15 AM
e30325i e30325i is offline
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possibly make it a bit louder as well
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  #6  
Old 01-15-2013, 04:54 AM
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Nick323 Nick323 is offline
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Every car reacts different to Cat removal.
Here we don't need it, so out it goes as it serves no Automotive function
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Old 01-15-2013, 10:56 AM
87bmw e30 87bmw e30 is offline
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Awesome, thank you.
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  #8  
Old 01-15-2013, 04:48 PM
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downhiller downhiller is offline
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Quote:
Originally Posted by Nick323 View Post
Every car reacts different to Cat removal.
Here we don't need it, so out it goes as it serves no Automotive function
that graph is for a s60 from a stage 1 to a stage 2 turbo. dont know where you were trying to go with that...but yeah.....

anyway, removing the cat will let the engine breathe better. what this means in performance wise, youll get better high end (not much) youll lose some low end, but the big thing is mpgs. you may see 1-2mpg more unless youre like me, then you get 5-6mpgs less cause the exhaust is louder.

oh and pray you dont ever get emission laws, cause your car will fail miserably
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Old 01-16-2013, 05:32 AM
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Nick323 Nick323 is offline
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Red face

Downhiller, it was just a graph taken from a random vehicle where we had cleaned out the cat + fitted a K&N replacement filter to show the HUGE increase in power.
Granted, these graphs are from turbo cars, as we normally do Headers with FF when we are removing the cats on NA vehicles. Doing a Territory as we speak.
I agree with what you are saying.
If the fuel is a bit dodgy, it will clog the cat taking away quite a bit of power.

Here we think emissions are what you get from baked beans
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  #10  
Old 01-16-2013, 08:18 AM
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hornhospital hornhospital is offline
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Originally Posted by Nick323 View Post
Here we think emissions are what you get from baked beans


Good one, Nick. Quote worthy.
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  #11  
Old 01-16-2013, 12:58 PM
87bmw e30 87bmw e30 is offline
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Thanks guys, im going to take off this weekend and let you know the results.
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