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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 09-28-2016, 09:32 PM   #1
LastGreatOne
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E46 5.0 engine swap

5.0 e46 why are they not common? the 5.0 produces more power than most of the engines excluding the s54, but is dirt cheap in comparison. the cost of maintaining and moding is so much cheaper. Torque! lol but for real is it possible? whats the major issues? cani run 2 ECU's one for the motor and crap and one for normal functions like doors.... maybe even do a system using the ecu from the 5.0 and retro fitting a the original techometer form it. just spit balling. educate and help me out thats what im here for.


ps dont say ls or stay bmw. I cant afford a bmw V8 and or and ls. well at least i dont want to

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Old 09-28-2016, 09:57 PM   #2
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It's not just the expense; it's the knowledge base. Most folks attempting a non-BMW, non-I6 engine swap want some assurance it will actually fit and work properly when everything's hooked up, and there's been a trail blazed already re:LS swaps in BMWs. There are enthusiasts out there, such as yourself, with the desire and know-how to try something new, but you're in the minority of the minority.

Are you planning a build?

P.S. --- You say you can't afford a BMW V8; have you priced an M60 lately? You could probably pick one up for a couple hundred, aluminum block, 282 hp out of the box.
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Old 09-28-2016, 10:32 PM   #3
Alex323Ci
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it's been done.
not worth the hassle for most and not going to pass smog in those states where they test.

btw you have a 328 and unless you reinforce those rear axle carrier floor mounts it's certainly gonna tear it staight out. infact if you car hasn't already had it fixed it's likely to go out on it's own with stock engine. just a heads up
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Old 09-28-2016, 11:18 PM   #4
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yea i am at a high debate of doing a swap for christmas. i was thinking about a s54 easy straight swap but then i was like how much power can it take? answer alot but so costly. so was talking **** to my friend looking at mustangs and was like im put one in my bmw. bang lights bulb lol. i saw a few pics but no guides or anyone throwing advice around.
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Old 09-28-2016, 11:28 PM   #5
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Yea ik in going to need to do some/alot of renforcement i plan on doing that when im under the car doing the m3 dif swap. i will post a full build list soon. i want ppl to poke holes in it and tell me what im missing. whats better/worse....
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Old 09-28-2016, 11:29 PM   #6
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Because motor swaps cost a freaking ton more than you could ever imagine. Ask me how I know.
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Old 09-28-2016, 11:30 PM   #7
redline61
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Save yourself money and just buy an M3 or M5. Also the T5 that is behind the 5.0L is a pos.
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Old 09-28-2016, 11:36 PM   #8
Rob43
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Quote:
Originally Posted by LastGreatOne View Post
5.0 e46 why are they not common? the 5.0 produces more power than most of the engines excluding the s54, but is dirt cheap in comparison. the cost of maintaining and moding is so much cheaper. Torque! lol but for real is it possible? whats the major issues? cani run 2 ECU's one for the motor and crap and one for normal functions like doors.... maybe even do a system using the ecu from the 5.0 and retro fitting a the original techometer form it. just spit balling. educate and help me out thats what im here for.


ps dont say ls or stay bmw. I cant afford a bmw V8 and or and ls. well at least i dont want to

If you had to put an average worthwhile gain on a WHP & WTQ number that you'd want to end up with, what would that be ?



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Old 09-29-2016, 12:42 AM   #9
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LS-1 or 7 and 6 speed or not at all.
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Old 09-29-2016, 05:34 AM   #10
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I think it is just so difficult with the electronics and modules in the E46. The E36 is a different story according to this.... http://e36v8.com
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Old 09-29-2016, 11:50 AM   #11
LastGreatOne
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with the electrical problems cant a just run 2 ECU's in the car is it me or is that crazy talk ?? the first ecu from a foxbody or something connected to the motor amd running all motor info to it the second running all the other systems example abs and doors..... i may ask my instuctor when i start school back in a weeo. but yea
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Old 09-30-2016, 01:23 AM   #12
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It is a question of how much of the factory car you want to maintain. The gauges are all canbus and you will need to trick the factory dme to think it is getting signals from the original motor to get the gauges, fuel pump, and the anti theft crap to work. If I remember correctly there is something canbus related to get the heat/air conditioning systems working too. Also the abs system and stability control. The other option is to just start hacking things out and run without them or aftermarket and it is all up to what your goals for the car are.
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