80′s BMW M3 Motor build up with a 2002 bottom end

September 18, 2007

BMW M3 S14 motor
Even though I havent even put 7,000 miles on my first motor install I purchased a cheap S14 2.3- liter motor from the first M3. In combination with my other parts lying around, I am going to build a 2-liter M3 motor with the bottom end (M10) from the 2002. Actually, the blocks are identical except for displacement but machining will probably be required to get all the oil and coolant passages to line up. The M10 block has been in production for over 20 years. My friend and mechanic JP Cadoux will be teaching me how to hand build my first motor and I will be teaching him to control fuel and spark delivery with MegaSquirt open-source software.

I dont want to reveal too many details yet because I am not sure what is possible but I have some very exciting ideas. This motor will be completely custom from the machine work to get everything to mate up to the pistons and rods. For what I am trying to build I dont think I’m going to find anything off the shelf. I am going to attempt to use the same camshafts and valve train as well as the M10 2.0 crank of course. Once the machinist has his hands on it I will know more.

Categories: Cars


  1. Mark Stumm says:

    I am preparing my acquired S14 motor for transplant in my 1975 BMW 2002. My plan is to use Megasquirt for engine management and would appreciate any ideas you may have from your earlier experiences.



  2. admin says:

    Wow thats a big question. All I can say is read. Read the Megasquirt manual over and over again. I still learn something new every time. Really all you need is patience and a little bit of DIY knowhow. Good luck!

    Other than that, http://www.msefi.com and http://www.bmw2002faq.com are the best forums for specific questions to be answered.

  3. Chad says:

    Hi, i was just checking out your car project and wanted to see if you could help me out. I am swapping a 2.3l S14 into my 320is and am wondering if you had to modify your driveshaft, shift tower mounts, and how you resolved your exhaust system? Hi flow cats? or Custom shop job? All I have are the headers. Thanks a lot. I am anxious to get started on my project and am looking for any advise that I can get. I am in Mpls, MN. thanks, chad

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  7. Demetri Sackmeoff says:

    In production we have the s14 head mit m10 block 2.1 ltrs. Megasquirt 3 turbo charged BMW 2002. Happy to reveals how this is done including full sexy pictures.


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