Turboing a turboed car 320d

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  1. Turboing a turboed car 320d 
    #1
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    mak46's Car Details
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    This is a very silly question, but it was being discussed the other night at the pub with a mate of mine.

    Can you strap another OEM E46 320D turbo onto your current 320D turbo to eliminate lag?

    Or another smaller/larger turbo on the car to eliminate lag?

    Isit even possible?

    Thanks
     
     

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    Yes you could, in theory, fit a smaller turbo to eliminate (or reduce) lag by sequentially turbo charging the engine (smaller turbos are more efficient and spin up quicker). But I doubt it's practicably possible and if you did somehow find your way around the engineering (mechanical, electrical, electronic and engine management) issues necessary to make it work, I suspect the cost would outweigh the benefits.

    It is, as it happens, more or less what BMW themselves did with the 330D and 530D to create the 335D and 535D
     
     

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    You'd be creating yourself, effectively, a 123d

    2008 335d M Sport Coupe
     
     

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    Quote Originally Posted by cforehead View Post
    You'd be creating yourself, effectively, a 123d
    a 323d surely, or 325d if using the current 1 series. Actually, when I posted earlier I didn't realise BMW had already done a 4 pot twin turbo diesel, the change might not be so difficult to implement after all if you got yourself a rear end shunt write off 123 or 125d
     
     

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    Sounds like a 'compound setup' you need two different sized turbochargers, small and big, the small turbo sucks through the big turbo till the big turbo has spooled and then it blows through the small turbo, giving quick spool of the small unit with the air flow of the larger unit, its commonly used on a larger scale in tractor pulling thats how they get hundreds of psi boost
    1993 E36 BMW 325 TDS with:

    egr delete
    super chipped
    boost controller @1.5 5th gear bar boost
    De cat pipe
    straight through turbo back, no backbox
    hard pipe turbo to induction filter
    Pefrormance FMIC with custom mandrel IC piping
    Water / methanol injection (being setup)
    increased injector duration (being setup)
    13t turbo upgrade (being setup)
    Solid engine mounts, braced front and rear, coilovers, lots of smoke
     
     

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    #6
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    Think when I get my GT22 hybrid turbo, I'm going to test this out somehow :p

    Iv done some Motorsport engineering, an currently doing a level 2 in mechanics, sooooo in a few years when I do upgrade, I'm going to give this a shot. Or I might get the turbo from the 330d and above
     
     

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