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my M3 CSL

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    #121
    Installed some VAC ultralight pulleys.
    Chuffed about the results

    https://nam3forum.com/forums/forum/c...s-do-they-work

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      #122
      Any updates this year ?

      Comment

        #123
        I need to put the data of the H&R anti roll bars and will be doing a service soon, will keep you updated.
        I did some modifications on my M5 .

        Next year I may buy a 2nd set of wheels for the CSL.
        Other upgrades ? Don't see something missing.

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          #124
          21.05.2017

          No update in a very long time.

          Not much changed other than that I am still driving and enjoying the CSL.
          I installed Michelin Cup 2 tyres and recently I did the Inspection 2 service, including adjusting the valve clearance on my own.
          I had only 5 valves needing slight adjustment.

          Here's a photo from last weekend.



          And today I did another leak down test and all cylinders checked out fine :thumbs:



          I am in the process of installing my SPAL electric fan. It has been sitting for 2 years but the following video of engine masters (I have a Motortrend on demand subscription and watch various series) convinced me to get this 10HP of parasitic loss.
          You can expect as always a comparison with data

          https://www.youtube.com/watch?v=ZXdLgaFXZzs&t=420s

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            #125
            Great post as always!

            Thanks for sharing. :thumbs:

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              #126
              Any opinions on the Cup 2s yet ?

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                #127
                Originally posted by Mike R View Post
                Any opinions on the Cup 2s yet ?
                June 11th Mike. Will tell you that day.

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                  #128
                  17.02.2018

                  It has been a while since I posted something.

                  I continue reducing the weight of the car without compromising the comfort and practicality it has.

                  This JMT lithium battery was on offer from 500 EUR to 250 EUR and I bought one !
                  I had to buy the battery posts separately. They are XS power (XS power 586 Tall Brass Post Adaptors M6).
                  The battery is very light - 2091 g
                  It works great and it will not discharge when the car is not being driven for 5 weeks.




                  I then started making my own battery holder as this battery is very small compared to the OEM
                  Also, there were some weight savings as the OEM battery holder is very heavy.

                  1310 g


                  I made the new holder from aluminium.

                  Only 237 g


                  In the car - yes I put lighter nuts :whistle:



                  In the car with the lithium battery




                  Results:

                  OEM Battery + OEM holder = 15.6 kg + 1.3 kg = 16.9 kg
                  JMT Lithium Battery + Alexk holder = 2.1 kg + 0.2 kg = 2.3 kg
                  Weight savings = 14.6 kg

                  Not bad for 250 EUR

                  Comment

                    #129
                    Thats a great mod.

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                      #130
                      Wow, that is a significant saving .

                      Does the Lithium battery need a special trickle charger ?

                      Comment

                        #131
                        Originally posted by Mike R View Post
                        Wow, that is a significant saving .

                        Does the Lithium battery need a special trickle charger ?
                        It's a special lithium battery charger Mike.

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                          #132
                          It is a very impressive weight saving, but I would have some concerns about how well the battery would be held in place in an impact.

                          MC

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                            #133
                            Originally posted by MisterCorn View Post
                            It is a very impressive weight saving, but I would have some concerns about how well the battery would be held in place in an impact.

                            MC
                            Fair comment, but the battery is only 2 kilos.
                            Worst case scenario is that the holder will bent, but that's the least of my concerns in a very severe crash.

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                              #134
                              I realized just now that I never posted the electric fan installation.
                              I have done a very good job with this one :thumbs:
                              I couldn't see with my telemetry a performance difference.

                              I will write something tonight.

                              Comment

                                #135
                                Almost a year since the last post :whistle:

                                Here we go.

                                Some time ago I removed the front AC fan as I believe it is reducing the airflow to the radiators.

                                The fan I bought to replace the mechanical fan is a SPAL - VA18-AP71/LL-59A.
                                The item number is -> # 30102049 . 2070 CFM 16" Spal Curved Blade Puller Fan

                                The unit is 2440g which means it's 700g heavier than the mechanical fan which is 1710g.
                                But, it reduces the parasitic losses and you can get to remove the AC fan which is a very heavy unit.









                                Mounting it was as easy as drilling 4 holes in the radiator, using 4 brackets and bolting it.

                                The clearance to the engine is simply perfect - like if it was made for the CSL.
                                I also cut the OEM fan shroud and put it back on.
                                The installations looks very clean.

                                I am driving this fan using the control unit of the AC fan and it works perfect.





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