Turbo engine advise needed S50B32 vs M50B25... - Page 3

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    #21
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    The M50/M52 vanos or non vanos is a easier engine to start with then the S50.
    Given the power goals you will need new rods and pistons, ARP studs and a general rebuild of the engine.

    Making the engine larger helps the spool but is not an absolute necessity for the power goal but will make for a nicer wider power band.
    With great challenges comes great engineering.
    Gunnar Reynisson @ Cosworth
     
     

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    I have now bought a spare S50B32 engine for the build and have started to collect the parts. I am using the 6266 0.81AR Precision turbo and 46mm wastgate. I have also decided on a top mount turbo manifold and just received the OBX manifold from the states.

    The EMS is still up in the air and I am thinking of the Dastec Q+ system. The only thing keeping me back is the tuning software is dealer only. They wont sell you it unless you have a dyno but the software looks great.

    If only the VEMS PnP was able to substitute the siemens ECU without the loss of the VANOS control??

    Any advise/ thoughts/ comments on the management will be appreciated...I see another topic for the forum.

    Will -
     
     

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    Might want to go for a Link or Vipec ecu. There are a few people around the world that have used this ecu for turbo'd s50b30 and 32's
     
     

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    Quote Originally Posted by petrolmarty View Post
    Is that possible 550- 600 bhp, thats Lambo, Aston and GT3 area. Sounds like a pipe dream to me.
    Just head over to Bimmerforums.com (Turbo and Supercharger section) and you will see it's very possible m8
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    #25
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    Quote Originally Posted by Will_UK_74 View Post
    I have now bought a spare S50B32 engine for the build and have started to collect the parts. I am using the 6266 0.81AR Precision turbo and 46mm wastgate. I have also decided on a top mount turbo manifold and just received the OBX manifold from the states.

    The EMS is still up in the air and I am thinking of the Dastec Q+ system. The only thing keeping me back is the tuning software is dealer only. They wont sell you it unless you have a dyno but the software looks great.

    If only the VEMS PnP was able to substitute the siemens ECU without the loss of the VANOS control??

    Any advise/ thoughts/ comments on the management will be appreciated...I see another topic for the forum.

    VEMS can do fully variable double vanos now.

    The piggyback would not have gone well with that sized turbo.!
    With great challenges comes great engineering.
    Gunnar Reynisson @ Cosworth
     
     

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    Quote Originally Posted by gstuning View Post
    VEMS can do fully variable double vanos now.
    That is really good news!! When will it be ready to market?
    I would much rather go with the PnP.
    Will -
     
     

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    I don´t know if I will be doing a S50B32 pnp just yet. Need to get the non vanos, vanos and siememens replacements done, tested and whatnot.

    There is a bit more to the S50 PnP´s then the others, the B32 more then B30.
    With great challenges comes great engineering.
    Gunnar Reynisson @ Cosworth
     
     

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    #28
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    Quote Originally Posted by gstuning View Post
    I don´t know if I will be doing a S50B32 pnp just yet. Need to get the non vanos, vanos and siememens replacements done, tested and whatnot.

    There is a bit more to the S50 PnP´s then the others, the B32 more then B30.

    That is dissappointing but completely understandable considering the development time and cost. As I have already invested in a S50B32 engine I will have to continue along this route and will find a management solution that works for this engine.

    I am now considering the AEM FIC-8 (and no longer the Dastec Unichip Q). It also has a MAF simulator to convert to MAP sensor...plus the ignition and fuelling. It is the same unit HPF are using and you can tune it yourself - no stupid limitations like Dastec.

    Failing this a standalone remains the ultimate option but I really don't want to lose the OBD functionality. And on top of this the tuning costs for a standalone are expensive.

    I called Bexley (while still thinking about the Dastec unit as they're on of the few London approved installers - they also did not recommend Dastec btw) - punting MBE with costs: -
    ECU: £1200+
    Wiring: £800+
    Tuning: £1000+

    The DTAfast S100 unit is about £1200.

    Perhaps if I could get a decent base map for one of the standalone management systems I would reconsider?? Any ideas?
    Will -
     
     

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    #29
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    You can always use a VEMS though. It just needs wiring.
    With great challenges comes great engineering.
    Gunnar Reynisson @ Cosworth
     
     

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