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Thread: 850CSi full Supersprint install

  1. #1
    Join Date
    Mar 2005
    Location
    Houston, TX
    Posts
    86
    My Cars
    '85 M635csi, '84 545i, 88 M3

    850CSi full Supersprint install

    Hey guys,

    Iíve searched high and low and canít find anyone whoís installed a header back supersprint system so I thought Iíd post the install of mine. I ordered it last year during the 50% special and it arrive about a month ago. I opted for the mid pipes with cats.

    Iíll post pics up and will try to get a video with sound when itís done.

    So far one side of the manifolds are out...bank 1-6 hopefully out tomorrow. Itís a bear of a job.




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  2. #2
    Join Date
    Jan 2008
    Location
    Laguna Woods, California
    Posts
    2,046
    My Cars
    1993 850Ci, 2011 Nitro
    Xlnt!

    Really interested in your exhaust adventure. I bought the rear exhaust during the 50% off sale.....didn't even think about the headers.
    1993 850Ci.....161,000 miles and counting!

  3. #3
    Join Date
    Mar 2018
    Location
    San Francisco, CA
    Posts
    24
    My Cars
    '97 E31
    Wow can't wait to hear this thing. Please do get all the video you can!

  4. #4
    Join Date
    Jul 2002
    Location
    LA & Colo Spgs
    Posts
    969
    My Cars
    Too many ;-)
    I have the supersprint mid-pipe back. Previous owner said he was "disappointed" it was not louder, but I think it sounds perfect. Loud enough to be noticed, but not so loud that you wake up the neighborhood. Will be interested to know if the headers do anything for your power band, too.
    "Asphalt is evil, it must be punished!"
    '89 Z1 Dream Black/Alcantara/Camo, Racing Dynamics, the coolest doors known to man -- Sunny days & Sundays
    '90 Z1 Red w/custom red/black French leather, Ground Control coil overs, BBS RV-F --Mais Oui!
    '91 850i Mauritius Blue/Black --1 of 179

    '85 M635CSi Alpine -- "Explosive!!!"
    '03 M3 Conv, Imola w/ SMG -- her daily driver
    '17 ď30 JahreĒ M3, Macao Blue -- 1/500 made


    Previously owned: 74 2002 (x2), 85 325e, 80 323i Baur, 94 325iC, 03 325CiC, 80 633CSi, 90 325iC, 98 318ti (Budget M3), 01 X5, 02 X5 4.6is (x2), 94 M3, 98 M3/4, 16 340i

  5. #5
    Join Date
    Feb 2007
    Location
    UAE
    Posts
    641
    My Cars
    SL300-24, 750iL, 633CSi
    +1 for videos and sound....maybe even a dyno?
    "Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

  6. #6
    Join Date
    Nov 2008
    Location
    NYC
    Posts
    522
    My Cars
    850x2-M5-CLS-LotusS4-ZR1
    Are you selling your stock exhaust?


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  7. #7
    Join Date
    Mar 2005
    Location
    Houston, TX
    Posts
    86
    My Cars
    '85 M635csi, '84 545i, 88 M3
    Hey guys,

    So the system is installed...a few thoughts:

    - fitment is pretty accurate and didnít require a lot of adjusting back and forth between the pieces.
    - install of the header was also straightforward and lined up well. The flanges were numbered for each cylinder
    - the center muffler hangers had to be modified by popping out the studs and putting in longer bolts. That took some heat and a lot of hammering...the pipes were too big to fit in them without modifying.
    - the pipes stick out a little more than is my preference but Iím going to try and go back and push every piece in as much as possible to see if I can reduce that. Everything except for the driver muffler is a sleeved install
    - I opted for the catted mid section and after letting them warm up I would say 90% of the exhaust smell went away. Not 100%...

    Itís been really bad weather in Houston so Iíll try to get some pics and videos up when it clears up but initial impression is that it is definitely louder than stock but not by a whole lot. The tone changed to a deeper tone as well. I would say it sounds like stock +. Iím sure that you all that have straight pipes and magna flows are probably louder. Also, this is with the racing mufflers. I would think their standard muffler is quieter. It could probably be a little louder without being annoying but I would rather be quieter than louder and annoying.

    If youíre wondering it does not sound like an Italian V12...

    I would assume that with the Schrick cams installed there would be an increase in power but I donít have a dyno to test. I probably would be a little disappointed over all if I had paid full sticker price for the full set but at the price point from last yearís sale Iím very happy!

    Iíll probably hold onto the stock exhaust for now just for originality.

    Ismael M


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  8. #8
    Join Date
    Jun 2012
    Location
    Uk
    Posts
    1,293
    My Cars
    1994 850csi rhd
    If you can get to your DME eproms and read the file, email it to me and I will modify it to a tuned version for you for free. Eprom programmers are cheap on ebay.

  9. #9
    Join Date
    Mar 2005
    Location
    Houston, TX
    Posts
    86
    My Cars
    '85 M635csi, '84 545i, 88 M3
    Here are some pics after install...





    Omega man 1969,

    Thanks for the tip. Iíll buy one on eBay this week. I would rather burn a file on blank chips and have the stock chips put away. Is that ok?




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  10. #10
    Join Date
    Jan 2008
    Location
    Laguna Woods, California
    Posts
    2,046
    My Cars
    1993 850Ci, 2011 Nitro
    Looks great...thanks for the pics!
    1993 850Ci.....161,000 miles and counting!

  11. #11
    Join Date
    Jun 2012
    Location
    Uk
    Posts
    1,293
    My Cars
    1994 850csi rhd
    Quote Originally Posted by smokinm6 View Post



    Omega man 1969,

    Thanks for the tip. Iíll buy one on eBay this week. I would rather burn a file on blank chips and have the stock chips put away. Is that ok?



    Sent from my iPhone using Tapatalk Pro
    Yes that's what I meant, you need to read the file from the stock chip as a .bin (binary) file. It will be 32Kb. Email it over, I'll add the tuned ignition tables and modify the checksum to match your original file. I can them email it back to you, then you can burn it to 2 new EPROMs.

  12. #12
    Join Date
    Jan 2008
    Location
    Laguna Woods, California
    Posts
    2,046
    My Cars
    1993 850Ci, 2011 Nitro
    Quote Originally Posted by smokinm6 View Post
    Hey guys,I’ve searched high and low and can’t find anyone who’s installed a header back supersprint system so I thought I’d post the install of mine.
    Still liking your system?
    1993 850Ci.....161,000 miles and counting!

  13. #13
    Join Date
    Mar 2005
    Location
    Houston, TX
    Posts
    86
    My Cars
    '85 M635csi, '84 545i, 88 M3
    Quote Originally Posted by TedBobo View Post
    Still liking your system?
    Yah, it definitely sounds good and if I had someone to help Iíd like to record some drive bys but for my personal taste it could be a little more aggressive. Supersprint is all over the map on sound with their ĎF1 Raceí mufflers. On a 2010 M6 itís obnoxious to the point of a headache and on the 850 itís not that loud to where I wouldnít even want to see what the Ďsportí sounds like.

    Overall though I feel like I hear too much engine whine which is probably why Iíd prefer the exhaust to be a bit louder. Itís not like on the V10 that the engine sounds ridiculously cool...


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  14. #14
    Join Date
    Jan 2019
    Location
    Brunei
    Posts
    13
    My Cars
    E31 850i, G30 520d
    Whereís the video?? :p

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