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E46 Engine Swaps
Replacing your motor? From direct replacements to more exoctic engines, if it's going under the hood of an E46 3 Series this is the forum to discuss it.

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Old 01-09-2017, 12:49 AM   #1
e46ls2
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e46 LS build

its still a work in progress, the engines not even close to being ready & LOTS of parts are still needed..... heres the progress so far

2004 325CI 5 speed







and this beast!!! 6.0L of GMC work van goodness, its a 2006 LQ4 looks so good you could almost drop it in just like this......



but didn't stay that way for long







the color gets mixed reviews.....





heres the LS clone all cleaned up, still getting pieces together... LSA water pump, LS6 intake, LS3 oil pan









the car is also getting a complete rear subframe assembly from a 2005 M3 coupe



theres going to be a ridiculous amount of care and attention in this build







a modest street cam will keep this engine more than interesting





thats it so far but still more to come........_a_
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Old 01-11-2017, 02:19 PM   #2
autospeed_01
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Looks awesome. Can't wait to see the rest!
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Old 01-14-2017, 12:51 AM   #3
UncleShrek
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Wow. Impressive build so far.
If I may ask, how much cheaper is building an LS clone as apposed to buying a true LS?? Horsepower difference??
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Old 01-14-2017, 03:46 AM   #4
e46ls2
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Originally Posted by UncleShrek View Post
Wow. Impressive build so far.
If I may ask, how much cheaper is building an LS clone as apposed to buying a true LS?? Horsepower difference??
up here (west coast of canada) REAL LS engines from salvage cars go for 4-5,000

i picked up the lq4 with all the truck stuff, wiring, ecu, starter etc for $500 from a guy that wrecks work vans

as far as HP and TQ goes..... you can make great power with an iron block
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Old 01-14-2017, 08:40 AM   #5
El conquistador
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The truck based engines are much cheaper and have great HP potential
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Old 01-14-2017, 03:45 PM   #6
UncleShrek
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Quote:
Originally Posted by e46ls2 View Post
up here (west coast of canada) REAL LS engines from salvage cars go for 4-5,000

i picked up the lq4 with all the truck stuff, wiring, ecu, starter etc for $500 from a guy that wrecks work vans

as far as HP and TQ goes..... you can make great power with an iron block
Quote:
Originally Posted by El conquistador View Post
The truck based engines are much cheaper and have great HP potential
What's the weight difference in the iron block vs the aluminum block. The aluminum block would offer close to oem weight distribution.
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Old 01-14-2017, 05:40 PM   #7
e46ls2
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Originally Posted by UncleShrek View Post
What's the weight difference in the iron block vs the aluminum block. The aluminum block would offer close to oem weight distribution.
I've heard the difference between the 2 engines is 90-100 lbs the LS engines will run about 15 degrees cooler as well
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Old 01-19-2017, 11:53 AM   #8
G-Khan
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Damn son following this. Would this swap also be possible on a sedan automatic?

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Old 01-24-2017, 11:38 AM   #9
Chibo
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Oh lawd.
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Old 02-06-2017, 09:30 PM   #10
Yenko
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I'm interested in watching the progress in this. I have just became a BMW fan as I just bought my first one, but I have always been a Muscle Car junkie.

Here is a picture of my expensive weekend toy.

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Old 02-13-2017, 12:53 AM   #11
E46Envyy
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Sub'd
What are you doing about the ecu?


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Old 02-19-2017, 11:46 PM   #12
RUB10UT
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Can't wait to see how this turns out.
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Old 02-27-2017, 11:13 AM   #13
excelsiorracing
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I am also wanting to know how you are going to wire this in! I have a 330i sedan that will be getting the same treatment and i am tracking down all the wiring answers now! Custom made harness that keeps all the factory CANBUS stuff working for $1800 or is there a cheaper option?
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Old 04-30-2017, 08:56 PM   #14
Madhatter_
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Originally Posted by excelsiorracing View Post
I am also wanting to know how you are going to wire this in! I have a 330i sedan that will be getting the same treatment and i am tracking down all the wiring answers now! Custom made harness that keeps all the factory CANBUS stuff working for $1800 or is there a cheaper option?
Use LS3 for swap which runs factory GM canbus, or keep existing DME to run the accessories and dash and use a arduino based unit for the converting signals to the cluster and AC. (~$150).

https://www.bimmerforums.com/forum/s...an-bus-project

You can find them on facebook under Can Bus Module, can buy one direct that'll make the swap easier.

Last edited by Madhatter_; 04-30-2017 at 09:00 PM.
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Old 03-13-2017, 01:19 AM   #15
e46ls2
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hey everyone,

After searching and searching i FINALLY picked up more pieces to this huge puzzle.

these are OEM GM parts, they're meant to go on an 06-07 cadillac CTS-V

- power steering assembly
- low mount alternator (150amp)
- idler & tensioner
- all gm mounting hardware

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Old 05-07-2017, 06:03 AM   #16
AbdullaJaafari
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Questions:

1. What will the car be used for? Road, track, drift?
2. Why did you go for the M3 rear end? for its LSD?
3. What swap kit are you getting? or doing custom fabrication for mounts?
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Old 05-07-2017, 02:35 PM   #17
e46ls2
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Quote:
Originally Posted by AbdullaJaafari View Post
Questions:

1. What will the car be used for? Road, track, drift?
2. Why did you go for the M3 rear end? for its LSD?
3. What swap kit are you getting? or doing custom fabrication for mounts?
after the swap, the car will be a nice weather driver only, just a mild street car

i used the M3 diff for its size and yes because its a LSD as well

i will be using either CX racing or Vorslaq for the mounts headers etc...
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Old 06-25-2017, 05:31 PM   #18
UncleShrek
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Updates??
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Old 01-16-2018, 09:26 AM   #19
tc53092
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I too would like t see any updates. Looks like you are doing a very professional job with this swap. Please advise what you did about wiring. Thanks fro sharing.
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Old 02-05-2019, 08:08 AM   #20
Matt 330LS
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Updates?
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