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    #16
    Originally posted by Obioban View Post

    I'm running an OEM CSL airbox, with the race style dirty side. I've logged AITs-- by ~10mph my intake temps are ~ambient. In all of first gear I'm traction limited either way, so I don't really care if I'm making less power 0-10mph due to high intake temps. Drivability is fine.

    Combined, I have zero desire to switch to the flap. Less noise, more weight, more complexity, more failure points (especially as the flap motor seems to be a ~50,000 mile wear item, based on the CSL forums), in exchange for a benefit that I don't feel like can be realized. IMO BMW put it on the CSL for the exact reason they stated them did-- noise control, to allow the car to be legal to sell. I don't want to reduce airbox noise
    Where did you located your AIT on the oem/race snorkel set up? If you record ambient temp above 10mph, there isn’t really much benefit of having the routed air ducts to the intake of snorkel then?

    Comment


      #17
      Originally posted by CheckA View Post

      Where did you located your AIT on the oem/race snorkel set up? If you record ambient temp above 10mph, there isn’t really much benefit of having the routed air ducts to the intake of snorkel then?
      That's why I'm not running the ducts.

      It's in the OE location on the clean side of the filter. Not the best picture, but the first one I found in my library where you can see it:

      Click image for larger version

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      2005 IR/IR M3 Coupe
      2004 JR/Black M3 Wagon
      2001 LMB/Black M5 Sedan
      2017 i3 Hatchback

      Comment


        #18
        Originally posted by Obioban View Post

        I'm running an OEM CSL airbox, with the race style dirty side. I've logged AITs-- by ~10mph my intake temps are ~ambient. In all of first gear I'm traction limited either way, so I don't really care if I'm making less power 0-10mph due to high intake temps. Drivability is fine.

        Combined, I have zero desire to switch to the flap. Less noise, more weight, more complexity, more failure points (especially as the flap motor seems to be a ~50,000 mile wear item, based on the CSL forums), in exchange for a benefit that I don't feel like can be realized. IMO BMW put it on the CSL for the exact reason they stated them did-- noise control, to allow the car to be legal to sell. I don't want to reduce airbox noise
        Yeah, the flap is a pretty significant contributor to the complexity of the project too. I put in all the effort to add it in and now I have it programmed to be always open in sport mode (both modes have throttle pedal remapped to my preference, which is basically linear). There is no drivability difference compared to my comfort mode, which uses stock CSL sport mode flap settings. At least two local shops who see a lot of conversions have been really impressed with how well it drives ... I put it down to the PCS tune and MAP sensor. I always run the car in flap open mode, so it was kind of a waste of effort. I'd do the race style next time and skip modifying the DME and adding the extra wiring.

        So the only cold air ducting you run is the kidney grille piece? Nothing from the fake brake duct area?

        Comment


          #19
          Originally posted by Stack View Post
          I emailed them

          The race box is just has a built in snorkel
          Instead of adding one it’s 1 piece

          I see ECS has the race box cheaper 🤫

          I went with a regular version awaiting the batch from IND

          AP Motorsport in the UK has them in stock
          I’ve emailed them as well


          Sent from my iPhone using Tapatalk
          This the one you’re referring to?
          https://www.apmotorsport.co.uk/produ...bonius-v2-race

          Comment


            #20
            I was just told they will have 1 or 2 of them available in 3-4 weeks. Unless someone buys them now.

            Comment


              #21
              Originally posted by Mattn1192 View Post

              This the one you’re referring to?
              https://www.apmotorsport.co.uk/produ...bonius-v2-race
              Yes they had the v1 version and the race version last time I spoke to them


              Sent from my iPhone using Tapatalk

              Comment


                #22
                I must admit I did the flap mostly because I thought it would be neat to have it functional and I needed a project, but I did remember feeling a little better response off the line with the flap closed until about 3Kish where I have it set.
                I might be fooling myself though just so I can tell myself it was worthwhile to string 5 more wires to the DME, who knows. My memory can't be trusted sometimes unfortunately.
                2004 6MT Silbergrau Metallic
                Karbonius/OEM Snorkel/Flap/HTE Tuned
                Ssv1/Catted Sec. 1/SCZA

                AS SSK / BC Coilovers / 4.10 Gears/Sportline 8S
                OE CSL Trunk/RACP Plates/Beisan/AutoCarbon Wheel/Orion Halos/AVIN
                Instagram

                Comment


                  #23
                  Originally posted by repoman89 View Post

                  Yeah, the flap is a pretty significant contributor to the complexity of the project too. I put in all the effort to add it in and now I have it programmed to be always open in sport mode (both modes have throttle pedal remapped to my preference, which is basically linear). There is no drivability difference compared to my comfort mode, which uses stock CSL sport mode flap settings. At least two local shops who see a lot of conversions have been really impressed with how well it drives ... I put it down to the PCS tune and MAP sensor. I always run the car in flap open mode, so it was kind of a waste of effort. I'd do the race style next time and skip modifying the DME and adding the extra wiring.

                  So the only cold air ducting you run is the kidney grille piece? Nothing from the fake brake duct area?
                  Correct, the only duct I'm running is the kidney duct. My brake ducts are 100% functional brake ducts, that do nothing else :P

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                  Click image for larger version

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                  2005 IR/IR M3 Coupe
                  2004 JR/Black M3 Wagon
                  2001 LMB/Black M5 Sedan
                  2017 i3 Hatchback

                  Comment


                    #24
                    When buying a CSL airbox from Karbonius, you don’t HAVE to buy a snorkel right?

                    Comment


                      #25
                      Originally posted by Mattn1192 View Post
                      When buying a CSL airbox from Karbonius, you don’t HAVE to buy a snorkel right?
                      Correct.
                      2004 6MT Silbergrau Metallic
                      Karbonius/OEM Snorkel/Flap/HTE Tuned
                      Ssv1/Catted Sec. 1/SCZA

                      AS SSK / BC Coilovers / 4.10 Gears/Sportline 8S
                      OE CSL Trunk/RACP Plates/Beisan/AutoCarbon Wheel/Orion Halos/AVIN
                      Instagram

                      Comment


                        #26
                        Originally posted by Cubieman View Post

                        Correct.
                        Will it still run as strong without it?

                        Comment


                          #27
                          Originally posted by Mattn1192 View Post

                          Will it still run as strong without it?
                          Even with a non-CSL bumper I would think that the snorkel or Race version of the airbox would run a bit cooler, this is one reason I sold my Turner box.
                          Even with a US bumper and not creating any sort of ducting the Snorkel is ~8" from the top hole on the brake duct so can't help but think this would aid in getting cooler air to the engine. So in MY mind the snorkel with or without the flap or race version would be better than the standard version without the snorkel as far as IATs go.

                          It would be interesting to log IATs with and without snorkel on a US bumper.


                          Also, here is some shots of the CSL ducting just because.
                          Click image for larger version

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                          2004 6MT Silbergrau Metallic
                          Karbonius/OEM Snorkel/Flap/HTE Tuned
                          Ssv1/Catted Sec. 1/SCZA

                          AS SSK / BC Coilovers / 4.10 Gears/Sportline 8S
                          OE CSL Trunk/RACP Plates/Beisan/AutoCarbon Wheel/Orion Halos/AVIN
                          Instagram

                          Comment


                            #28
                            Originally posted by Cubieman View Post
                            So in MY mind the snorkel with or without the flap or race version would be better than the standard version without the snorkel as far as IATs go.
                            Plus it looks better
                            2003.5 MT JB/B - CSL SCHRICK SUPERSPRINT EISENMANN JRZ SWIFT BREMBO ENDLESS BBS/SSR DREXLER SACHS RECARO SLON MKRS GSP DMG KARBONIUS CP AUTOSOLUTIONS KOYO

                            Comment


                              #29
                              I saw some posts saying that you get more sound from the OEM filter than the ITG filter. Any truth to that?

                              Comment


                                #30
                                Originally posted by Mattn1192 View Post
                                I saw some posts saying that you get more sound from the OEM filter than the ITG filter. Any truth to that?
                                I started with ITG and now run OEM filter and haven't noticed a difference.
                                2004 6MT Silbergrau Metallic
                                Karbonius/OEM Snorkel/Flap/HTE Tuned
                                Ssv1/Catted Sec. 1/SCZA

                                AS SSK / BC Coilovers / 4.10 Gears/Sportline 8S
                                OE CSL Trunk/RACP Plates/Beisan/AutoCarbon Wheel/Orion Halos/AVIN
                                Instagram

                                Comment

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