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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 04-29-2010, 02:33 PM   #21
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part 2, waiting for it.
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Old 05-09-2010, 09:01 PM   #22
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Headers

Will I get a check engine light?
- YES, you absolutely will.

What are my options to get rid of the warning light?
- 3) O2 Simulator. http://forum.e46fanatics.com/showthr...t=o2+simulator
Would this option pass emissions?
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Old 05-09-2010, 09:38 PM   #23
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Would this option pass emissions?
it should... just need to make sure to have a catted midsection... i don't know the cell rating that you should get, but having the cats+ o2 sims should pass the sniffer and obd check
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Old 05-13-2010, 03:05 PM   #24
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I also noticed an improvement with the underdrives and +2 mpg to boot! Nothing like getting headers though
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Old 05-13-2010, 04:29 PM   #25
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Depends on your state. In TX, no sniffer, just OBDII connection. The sims tell the DME that all systems are go, so it passes here. If you have a visual or sniffer, you're (probably) going to fail. That being said, my buddy's 91 300ZXTT has no cats and passes sniffer. Go figure.

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Would this option pass emissions?
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Old 05-15-2010, 12:07 AM   #26
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I also noticed an improvement with the underdrives and +2 mpg to boot! Nothing like getting headers though
I read you feel the under drive pullies more with an auto tranny; I am going to install headers... how would u rate feel of the pants improvement on a scale of 1-5?
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Old 05-15-2010, 02:34 AM   #27
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I read you feel the under drive pullies more with an auto tranny; I am going to install headers... how would u rate feel of the pants improvement on a scale of 1-5?
It's more a sound thing than anything else. 9 times out of 10 a louder car will "feel" faster. I think a lot of people would be hard pressed to notice a 10rwhp difference with a whole bunch of noise involved.
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Old 05-16-2010, 08:46 PM   #28
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I would rate the headers as a 3 and the under drive pulleys a 1-1.5. I haven't ever felt more of a gain messing with an exhaust on ANY car and I have put headers in 4 of my own other cars (2 mustangs, bimmer, old mopar)

I do have an auto tranny, so that may have something to do with why I noticed the mpg and power... but it wouldn't make much sense to me why that would matter. Its such an even across the board gain I think its harder for people to notice.

air filter would be a 0 even though It does make it sound a lot better

we will see with the rest of my exhaust system in a month or so
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Old 05-19-2010, 01:50 PM   #29
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waiting for part 2.
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sometimes i'm into it and my one hand gets tired, i try switching, but then it's like someone with lou gehrig's trying to peel a carrot.
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Old 09-18-2010, 11:54 PM   #30
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In for part 2...
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Old 09-19-2010, 12:00 AM   #31
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please revise your header section, some of the info is off. feel free to link to my header thread.
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Old 09-29-2010, 07:48 PM   #32
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is part 2 ever gonna happen??
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sometimes i'm into it and my one hand gets tired, i try switching, but then it's like someone with lou gehrig's trying to peel a carrot.
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Old 10-08-2010, 12:50 PM   #33
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Maybe he already sold his car and got an M3.

Sorry couldn't resist. Great thread btw.
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