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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 10-10-2008, 08:50 AM   #21
shady3one3
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To properly maximize gains from building internals and/or changing compression...you need a new ECU. To get any appreciable power at all...you need a new ECU. So you need a little under $3k to buy it, you'll need someone familiar with it to help you wire it for at least another $1k, then you need a tuner who has done it before and lots of hours on a dyno....and now we're at $5k on top of the cost of new internals and the labor to swap them. And you still wont be making as much power as an NA S54 with cams and headers, you wont have VANOS anymore, and your motor will need a rebuild it otherwise wouldnt.

Get cams and headers and generic software. If that isn't enough power for you, you need a new motor/car.
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Old 10-10-2008, 02:59 PM   #22
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where would i find performance camshafts for a 325
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Old 10-10-2008, 09:37 PM   #23
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Stick a supercharger kit on and call it a day.

Rebuilding an M54 isn't for the meek.
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Old 10-11-2008, 01:51 AM   #24
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Quote:
Originally Posted by pei330ci View Post
Stick a supercharger kit on and call it a day.

Rebuilding an M54 isn't for the meek.
+1

Swapping engines or internals would give you electronic nightmares. E46's have tons of electronics and security features and what not.

Bolting on a supercharger and having the ECU reflashed with appropriate tuning would be soooooo much quicker, cheaper, and easier.
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Old 10-11-2008, 06:42 AM   #25
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Quote:
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where would i find performance camshafts for a 325
VAC sells two different Schrick options somewhere between $1200 and $1300.
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Old 10-11-2008, 08:50 AM   #26
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I just saw on e bay some one selling internals for $300
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