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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 08-19-2012, 06:04 PM   #1
Hbenmeir
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E36 m3 engine in an e46

If I could only find the 3.2 240hp 240tq engine out of the e36 m3 would it sound retarted to wanna drop that in my e46. I realize it is an older engine, but if it's what I find what needs to be done for the swap.
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Old 08-19-2012, 06:04 PM   #2
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Fuckin I phone, please reply to first post sorry guys.
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Old 10-01-2012, 12:42 AM   #3
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Ya that sound pretty retarded. Is your e46 an m3? I know they are $22000 from dealer in canada but either way ive found in usa for $6500
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Old 10-13-2012, 12:12 PM   #4
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Doesnt sound retarded to me, i have also wondered the same. The m54 is based on the s52 so i would imagine it would be possible. The people on forums who constantly shout it cant be done and it will cost a billion dollars at everything people suggest simply dont know. There skill and knowledge usually stops at using a keyboard.
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Old 10-13-2012, 05:31 PM   #5
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If you're gonna do it, get a euro s52
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Old 10-14-2012, 02:02 AM   #6
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It's not legal. You cannot put an engine that was available in the 99 M3 in a car that was built after that year. That's why it cannot be done.
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Old 10-14-2012, 12:04 PM   #7
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Most people don't claim motor swaps to insurance companies. How many SR20DET 240's are there rolling around in America? SR20's are not legal motors
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Old 10-15-2012, 09:26 AM   #8
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It's not legal. You cannot put an engine that was available in the 99 M3 in a car that was built after that year. That's why it cannot be done.
Can in the UK so i think you mean not aloud to be done opposed to cannot be done. it can be done.
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Old 10-15-2012, 09:56 AM   #9
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Come to think of it, I could legally swap a 99 m3 engine into my 328... Hmm...

Haha not that I would at this point, I'm happy with my cammed 328 (updates to come soon)
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Old 10-16-2012, 07:16 AM   #10
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If you have a 330 CI, it's making close to 220 hp right? That is not far from 240 horses of an M3 (E36). I say install a set of headers, including a section 2 200 CPI cats, and a free flowing cat back exhaust, a good intake like an ECIS, and an engine flash should easily get you another 20 horses. Lastly, run an iridium spark plug which does fire ever so slightly hotter to help reduce your hydrocarbon emissions; plus, they don't wear out like an ordinary copper plug.
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Old 10-16-2012, 07:38 AM   #11
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Originally Posted by lucky_doggg7 View Post
If you have a 330 CI, it's making close to 220 hp right? That is not far from 240 horses of an M3 (E36). I say install a set of headers, including a section 2 200 CPI cats, and a free flowing cat back exhaust, a good intake like an ECIS, and an engine flash should easily get you another 20 horses. Lastly, run an iridium spark plug which does fire ever so slightly hotter to help reduce your hydrocarbon emissions; plus, they don't wear out like an ordinary copper plug.
Its not always just about how big of a difference in power the motors have at a stock level. The S52 is all around a better motor for whichever way you are gonna build it, na/fi. Sadly the m54 doesn't have much going for it for over 400whp fi, whereas people have built s52s to 600whp+

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Old 10-16-2012, 10:16 AM   #12
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Its not always just about how big of a difference in power the motors have at a stock level. The S52 is all around a better motor for whichever way you are gonna build it, na/fi. Sadly the m54 doesn't have much going for it for over 400whp fi, whereas people have built s52s to 600whp+

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Sir, please educate me where the OP indicated a desire for the power levels you write about. To clarify and make a baseline, the original post makes the point that 240 horsepower is desired, and my response provides viable suggestions to gain the twenty or so horsepower. Nowhere in the original post did OP say he desired 400 horsepower or later in your post 600 horsepower. Of course, if you believe me to be in error, I apologize for my lack of knowledge on the subject matter.
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Old 10-26-2012, 07:19 PM   #13
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VAC motorsports has an S52 in their 4 door E46 racecar. The S52 is fully built for race making over 300HP.

This wouldn't be that hard of a swap. As far as fitting in, it should bolt up just fine with E46 mounts the same way the M54 does. The transmission and associated parts bolt up fine too. Cooling system should hook up the same. Not sure if the oil pans are different and won't fit but if they are just use the M54 oil pan, it will bolt up no problem.

The only big thing is the electronics. Just swap everything from the E36 and look at a wiring diagram, plenty of info on that, check r3vlimited.com.
For the ECU just send it out to get EWS, evap system, rear o2 sensors, and other BS emissions crap you don't need deleted as if you were swapping it into an e30 and it will be good to go. There are many companies that can do this.. one is TRM - http://www.racersmarket.net/index.ph...mart&Itemid=93

Another thing I can think of is the S52 being cable controlled throttle body, you would have to replace the E46 electronic pedal with the e36 system.
I don't really see any major hurdles with this swap.

You can learn a lot about this by researching S52 and M54 E30 swaps and you will see that they aren't very different.
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Old 10-27-2012, 02:01 AM   #14
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It's not legal. You cannot put an engine that was available in the 99 M3 in a car that was built after that year. That's why it cannot be done.
If you can get it to run off stock electronics, I doubt any emissions shop would even notice it's the wrong engine.

As far as legality - I think as long as you can use the original emissions equipment, you're okay with swapping in an older engine. At least for non-Cali states.
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Old 10-27-2012, 05:32 AM   #15
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Most people don't claim motor swaps to insurance companies. How many SR20DET 240's are there rolling around in America? SR20's are not legal motors
240s with sr20 aren't legal.. but sr20s themselves ARE in fact US smog legal (except SR20dets). 90s sentra ser and Nx2000 and the infiniti g20s all came with SR20s
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Old 10-27-2012, 06:52 AM   #16
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Yes- it can be done. I can't see motor swapping been illegal as long as it passes smog inspection. That's the whole point of the inspection- making sure its smog compliant.
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Old 10-27-2012, 08:16 AM   #17
Hbenmeir
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I live in a place with no emission. I could run straight pipe in anything. And not get I trouble.
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Old 10-27-2012, 08:16 AM   #18
Hbenmeir
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So we can swap whatever we want out here
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Old 10-27-2012, 10:42 PM   #19
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Originally Posted by Hbenmeir View Post
I live in a place with no emission. I could run straight pipe in anything. And not get I trouble.
E36 M3 engine from 96-99 can fit fine in E46, and you can even pass strict california emissions with it also.

you just tranfer all of the obd2 stuff from E36 into E46, ECU can be flashed for E46 fuel tank specifications, so it will pass emissions.
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