Close

    • DCT Build Part XI - Final pictures of finished M3 DCT pan

      In the previous weeks we brought you the details on the DCT oil pan upgrade and the pictures of the machining process. We are happy to say the final design has been completed and here are the pictures of the finished product. Once again, this will allow 2 additional liters of fluid as well as the capability to connect to an external cooling source as you can see from the openings. Pricing details for the complete DCT cooling kit as well as components will be coming next, stay tuned.


































      This article was originally published in forum thread: M3 DCT Build Journal - World's First BMW DCT Build started by Sticky View original post
      Comments 2887 Comments
      1. DBFIU's Avatar
        DBFIU -
        Sticky,

        I did some calculations for you.

        At 20 psi boost and 8300 your engine will need 1137 SCFM supercharger flow rate.

        I will tell you if the YSI will be overspun or not, give me a minute.

        Attachment 9178
      1. Sticky's Avatar
        Sticky -
        ^ Good $#@! right here, good boost target too.
      1. DBFIU's Avatar
        DBFIU -
        Ok this is what I find, the YSi might have a hard time hitting your boost target on your engine.

        20 psi might be a little on the high side for this blower with your engine at redline.

        Look at this chart, this is a V-7 YSi compressor map.

        You are trying to move about 80 lbm/min of air with a pressure ratio of about 2.36. The blower will be worked, hard.


        Attachment 9180
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        20 psi might be a little on the high side for this blower with your engine at redline.
        Hehe, you are good. Exact same thing Jeremy told me on the phone the other day they found in their testing. I asked about the boost and his numbers were (I won't say exactly) lower than you just stated. I was surprised something like a YSI was already maxed. Well done DBFIU, right on the money.

        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        You are trying to move about 80 lbm/min of air with a pressure ratio of about 2.36. The blower will be worked, hard.
        This is why I already suggested an even bigger blower but they said the bracket for the YSI was a big enough of a pain in the ass as is. So the question is, go with this for now and move to something bigger later if possible or go even bigger? Beyond 20 psi looks like it won't be possible.

        What is it about the S65 that makes it so difficult? Not the revs, but the volumetric efficiency? Amazing that this little thing needs such big ass blowers. Oh, and think about if the redline is raised to 8800 or so...
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Hehe, you are good. Exact same thing Jeremy told me on the phone the other day they found in their testing. I asked about the boost and his numbers were (I won't say exactly) lower than you just stated. I was surprised something like a YSI was already maxed. Well done DBFIU, right on the money.



        This is why I already suggested an even bigger blower but they said the bracket for the YSI was a big enough of a pain in the ass as is. So the question is, go with this for now and move to something bigger later if possible or go even bigger? Beyond 20 psi looks like it won't be possible.

        What is it about the S65 that makes it so difficult? Not the revs, but the volumetric efficiency? Amazing that this little thing needs such big ass blowers. Oh, and think about if the redline is raised to 8800 or so...
        Yes the VE of this engine is so high it's flowing as much air as a 5 or 6 liter. Plus the redline is high, so you are moving a lot of air because of all this. 8800 RPM will make it worse, you need a bigger blower if you intend to boost more than 17-18 psi at 8800 RPM.

        you are welcome btw Click here to enlarge
      1. DBFIU's Avatar
        DBFIU -
        Have you considered the Procharger F1 or F1D?

        They are much more evolved for applications like this and they can spin both ways which means you can mount it wherever you want.

        Think about it.

        http://www.procharger.com/models.shtml
      1. Terminator-N54's Avatar
        Terminator-N54 -
        You my friend no you're $#@!!!!
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Ok this is what I find, the YSi might have a hard time hitting your boost target on your engine.
        Maybe I need this?

        Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Yes the VE of this engine is so high it's flowing as much air as a 5 or 6 liter. Plus the redline is high, so you are moving a lot of air because of all this. 8800 RPM will make it worse, you need a bigger blower if you intend to boost more than 17-18 psi at 8800 RPM.

        you are welcome btw Click here to enlarge
        Thank you.

        See, this is what I try to tell people about how awesome this motor is. This is why it can run with the big boys.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by Terminator-N54 Click here to enlarge
        You my friend no you're $#@!!!!
        What are you trying to say?
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Have you considered the Procharger F1 or F1D?

        They are much more evolved for applications like this and they can spin both ways which means you can mount it wherever you want.

        Think about it.

        http://www.procharger.com/models.shtml
        I have, just don't know if they would be a pain in the rear to switch too. Also, Gintani prefers the Vortech blowers for whatever reason. Might not be a bad idea to call up Procharger and see if they would be interested in donating a blower to the cause.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Have you considered the Procharger F1 or F1D?

        They are much more evolved for applications like this and they can spin both ways which means you can mount it wherever you want.

        Think about it.

        http://www.procharger.com/models.shtml
        You think an F1-D? I was thinking F1-A?

        Which one would allow me up to 25 psi if I wanted?
      1. DBFIU's Avatar
        DBFIU -
        Just go F1R and $#@! on everyone.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Just go F1R and $#@! on everyone.
        You don't think it's too big? I don't even know if that $#@! will fit. That would be one MEAN ass blower though. I don't like to even be close in races, I want to destroy people.

        How beautiful is this?

        Click here to enlarge
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Just go F1R and $#@! on everyone.
        Oh, and will changing the stroke mess with the VE?
      1. DBFIU's Avatar
        DBFIU -
        in that case, get two F1R's...


        Attachment 9181



        Just kidding Click here to enlarge


        But I think you CAN have a blower thats too big, the parasitic loss at the low end will exacerbate the already poor low end torque of the engine coupled with the lower compression and that will suck.

        But top end is what you want anyway, right?

        Any of the F1 class prochargers can handle the flow and power you need...

        F1-A is a good choice in my opinion, intercooler it if you can, with meth injection.. and you can hit 1000 whp easy.
      1. DBFIU's Avatar
        DBFIU -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        Oh, and will changing the stroke mess with the VE?
        Yes it will.

        As soon as you increase the displacement of the engine you increase port velocities.
        When you increase port velocity you reduce VE if the cams are not tuned for this.

        If you stroke the engine, get your heads ported.
      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        But I think you CAN have a blower thats too big, the parasitic loss at the low end will exacerbate the already poor low end torque of the engine coupled with the lower compression and that will suck.

        But top end is what you want anyway, right?
        Screw it, I'll drive around at 5,000 rpm. If I cared about low end I should not have bought an M3

        Click here to enlarge Originally Posted by DBFIU Click here to enlarge
        Any of the F1 class prochargers can handle the flow and power you need...

        F1-A is a good choice in my opinion, intercooler it if you can, with meth injection.. and you can hit 1000 whp easy.
        So you would choose the F1-A out of any of them? If I could do the F1-R should I?

        These will hit 25+ psi?

        What about stroking to mitigate the low end loss?
      1. Sticky's Avatar
        Sticky -
        @DBFIU what car is this?

        Click here to enlarge
      1. fastgti69's Avatar
        fastgti69 -
        Wow Dbfiu, you're one smart guy... Nice info in here lol.

        Sticky, you don't think tuning for a different supercharger will take some time too?