e36/e46 325i 328i m60/m62 v8 twin turbos SERIOUS HORSEPOWER GAINS NEEDED - Page 2

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Thread: e36/e46 325i 328i m60/m62 v8 twin turbos SERIOUS HORSEPOWER GAINS NEEDED

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    #11
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    Thanks, would i need to change internals of the engine at all? what would you suggest?
    the way i would do it would be-
    stock engine, turbo, straight through, mapped 400hp
     
     

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    #12
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    Wish it was that simple mate.... I gotta get an early night and it's too late to go in to detail so I will tell you more tomorrow or someone else might do!

    Until tomorrow mate!

    Mike
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    ak 18 (20-02-2012)

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    #13
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    Whack a e39 m5 lump in and turbo that
     
     

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    #14
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    turbo a v8? a bit pushed for space surely?
     
     

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    #15
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    Right mate, this is just from the top of my head so I might miss something!

    First of all I will state that I am not sure what the power limit of a 6 pot 325/328 is - maybe someone else knows?! I have seen silly bhp from the US forums but I think they had steel sleeved cylinders where we didn't?!

    So, engine work!

    Lowering the compression would be a good idea, one way is a 'spacer gasket' for the cheaper option which goes inbetween the block and the cylinder head but be, going too big can cause timing problems!

    Or the more expensive option would be the pistons, while it is apart you might as well change the rods and freshen the engine with new crank bearings, seals gaskets etc.

    ** One thing I always say if the head needs to come off get new valve stem oil seals, pressure tested and skimmed (& valve guides if needed) , this will save you the need to take it all apart again at a later date **

    So that is a general idea on the engine, if it was me - do it properly and rebuild the engine so you know it is sound!

    Turbo wise you will need:

    Turbocharger (GT3076R will be fine for 400bhp)
    Exhaust Manifold (T3 flange for above turbo)
    Custom downpipe, 3" and going to a minimum of 2.75" rest of system
    Custom air intake with good filter
    Custom boost pipe work from turbo to throttle body through an Intercooler (don't go stupid massive on the cooler there is no point and will cause more lagg!!)
    Custom oil feed and drain pipe form the turbo
    Custom coolant feed and drain pipe from the turbo

    Personally I would go externally gated as this give you more control over the turbo and will be much easier to run low boost levels than an internal gate (you won't need high levels of boost with the 6 pot engine)

    Engine management system.... I would go aftermarket as you will be able to use this to run the engine and give you the boost control needed.

    fuel system - again I am not sure what they can run standard but I would assume for a 200+bhp hike you will need to look at changing the injectors and possible fuel pump.



    .......


    Anything else anyone... I will no doubt come back with something else!! LOL

    Mike
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    ak 18 (21-02-2012)

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    #16
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    Right so looks like the best bet would be an M52 2.8l with a turbo strapped to it

    For the fuel system i would get the m3 individual throttle bodies put them on, is this a straight swap or fab work needed?

    now oil feed and coolant feed hows this done? is there a guide that someone else has done?

    thanks for the help as well
     
     

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    #17
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    Quote Originally Posted by ak 18 View Post
    Right so looks like the best bet would be an M52 2.8l with a turbo strapped to it

    For the fuel system i would get the m3 individual throttle bodies put them on, is this a straight swap or fab work needed?

    now oil feed and coolant feed hows this done? is there a guide that someone else has done?

    thanks for the help as well

    Why would you want to throw more spanners in the works though? M3 throttles dont fit the m50/2 engine without seroius amounts of work.
     
     

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    #18
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    If you dont have the time to research or the money to pay for someone else to do it, your not going to get it done.
    The US got iron blocks in their m52's (apart from z3's and tu's). It would be preferable to use an m50 block.

    I imagine this is your first project?
    What are you able to do yourself and what will need to be paid for?
     
     

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    Mr OBD (02-03-2012)

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    #19
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    I agree with an above post. An m5 v8 will probably be cheaper and more reliable and a lot less work and you will have 400bhp out the box! Only problem with that is weight over the front wheels although I seem to remember the m5 v8 is light for some reason don't know how true it is I may have even dreamt it :p haha
    to fast to live
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    click hear for extreme bbw punishment......
     
     

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    #20
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    Quote Originally Posted by niall_farley View Post
    I agree with an above post. An m5 v8 will probably be cheaper and more reliable and a lot less work and you will have 400bhp out the box! Only problem with that is weight over the front wheels although I seem to remember the m5 v8 is light for some reason don't know how true it is I may have even dreamt it :p haha
    electronic would be a complete nightmare, fly by wire throttle etc if i was you mate get an 5.0 mustang v8 which does fit and you can buy a fitting kit and then upgrade the engine, stock about 300bhp and easy to get 500bhp with a good amount of cash and knowhow.
     
     

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