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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 08-19-2008, 07:05 PM   #1
SoundOfSpeed
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Any 2.8s with headers?

So I threw on some S52 headers on my dual vanos 2.8 a little while ago and I didn't get the results im lookin for.

Car is running rich to the point where it's throwing codes and the ecu can't cut back on any more fuel.

I'm on a stock tune.



Anyone else run into problems when putting in some headers on a 2.8?
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Old 08-20-2008, 11:53 PM   #2
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I didn't had any problems. no codes, errors.
my motor was the m52tu
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Old 08-21-2008, 09:13 PM   #3
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Sure your o2's are in the corrct banks? Or any good?
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Old 08-21-2008, 09:18 PM   #4
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so hold on, S52 headers fit on M52TU with no issues, and gains?
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Old 08-22-2008, 06:25 AM   #5
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Check your o2 wiring/connections, and if anything have your mech. clear the adaptations.

The OBDII S52 headers work fine on the M52tu/M54, but you need to use the downpipe midsection from the e36, unless you're having a custom exhaust built. You'll also have to extend the o2 wiring if using the e36 exhaust (which I'm assuming the OP did).
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Old 08-22-2008, 10:27 AM   #6
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Check your o2 wiring/connections, and if anything have your mech. clear the adaptations.

The OBDII S52 headers work fine on the M52tu/M54, but you need to use the downpipe midsection from the e36, unless you're having a custom exhaust built. You'll also have to extend the o2 wiring if using the e36 exhaust (which I'm assuming the OP did).
and there are measurable gains from this?
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Old 08-22-2008, 12:14 PM   #7
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IMO it's not worth it seeing as you can get a set of eBay headers for ~$150. Before headers were available on eBay, these would've been a cheaper alternative to the brand name headers for our cars.
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Old 08-22-2008, 12:24 PM   #8
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ah..... but without an aftermarket ECU, how can u run ebay headers with no CEL?
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Old 08-22-2008, 11:26 PM   #9
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o2 sensors are brand new and wiring is fine. Exhaust is custom from S52 headers back. I've recoded the DME and adaptations ahve been reset. Been trying to figure this out for a little while.

What did you guys do about the cats? I installed a single 2.5" CARB legal Magnaflow cat.
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Old 10-07-2008, 01:22 PM   #10
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here I am..

bought them on ebay a long ago...

no cats,just the 2nd resonator and a remus muffler....

sounds great, revs better..

and i felt the gain since the 1st km... they said 20hp, for me are 15...

and in 2 years of abuse the light engine light pop out only after a trip of 500km on the highway...
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Old 10-19-2008, 10:03 PM   #11
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hmm.. no engine light huh.?? for me too I'm thinking putting in the headers from ebay and deleting the cat and resonater ..

If there is no codes .. I' d be looking for these upgrades soon..
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Old 10-19-2008, 10:59 PM   #12
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hmm.. no engine light huh.?? for me too I'm thinking putting in the headers from ebay and deleting the cat and resonater ..

If there is no codes .. I' d be looking for these upgrades soon..
Replacing the headers will give you codes
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Old 10-19-2008, 11:35 PM   #13
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Quote:
Originally Posted by SoundOfSpeed View Post
So I threw on some S52 headers on my dual vanos 2.8 a little while ago and I didn't get the results im lookin for.

Car is running rich to the point where it's throwing codes and the ecu can't cut back on any more fuel.

I'm on a stock tune.



Anyone else run into problems when putting in some headers on a 2.8?
There will be a dyno graph of before (stock M52TU - 'cept for a CAI) and after with the only mod being the eBay headers. I'll keep you informed.
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Old 10-20-2008, 01:54 AM   #14
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Are there any gains to be had from a S52 head? Or cams maybe?
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Old 10-20-2008, 06:26 AM   #15
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Replacing the headers will give you codes
If it happens is given by the different ECU settings (US cars/EURO cars)
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