Turbo questions, 328i and the Siemens MS41.1

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  1. Turbo questions, 328i and the Siemens MS41.1 
    #1
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    Hi all,

    I am looking to turbo a standard 328i (e36) and have a gew questions.

    1) i have heard that many of the available manifolds are for LHD cars? i quite like the idea of bottom mound turbo, is this still achievable on a RHD car?

    2) Who maps the 328i ecu? i believe it is a Siemens MS41.1, the car is late 97, is this the correct ecu?

    I am only looking for 6-8psi on a small (low lag) turbo, any recommendations would be great!

    Cheers for now

    Rob,
     
     

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    Any clues lads?

    Rob,
     
     

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    Come on guys some one must have fitted a blower to a late(ish) M52! really just want to know about problems with the ecu,

    Rob,
     
     

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    Hi Rob

    I don't know anyone on the forum that has done it, not that I have asked really.

    I was thinking of the same idea a while back, then thought about just buying an M3 due to power and reliabilty.

    I work on old skool turbocharged cars, I don't tend to touch newer stuff due to ECU chips and re-mapping.

    Heres a thread I started a while back

    Turbo Kit

    It might answer a few of your questions

    I have seen the bottom mounted turbo on a RHD car and seeminly the exhaust has a much better flow rather than a top mounted turbocharger.

    I am told that a 325/328i can handle up to 8psi or 350bhp on standard internals, you may need a head gasket spacer though to lower your compression.

    Cheers
    Billy
     
     

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    Quote Originally Posted by touringRob View Post
    Hi all,

    I am looking to turbo a standard 328i (e36) and have a gew questions.

    1) i have heard that many of the available manifolds are for LHD cars? i quite like the idea of bottom mound turbo, is this still achievable on a RHD car?

    2) Who maps the 328i ecu? i believe it is a Siemens MS41.1, the car is late 97, is this the correct ecu?

    I am only looking for 6-8psi on a small (low lag) turbo, any recommendations would be great!

    Cheers for now

    Rob,

    HI Rob

    I have similiar turbo plans and know a fair bit about turboing BMWs as Ive been an FI fan for years so heres some answers to your questions

    1/ No, the steering rack on a RHD car really screws using a bottom mount.
    However it is possible to reverse fit a US LHD turbo manifold so it becomes a top mount. But it may need tweaking

    2/ yes, it sounds like the right ECU
    For turbo specific tuning I would contact Nick G at 'technique tuning' in the US who may well be able to help

     
     

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    Quote Originally Posted by Reno5gtt View Post
    Hi Rob

    I don't know anyone on the forum that has done it, not that I have asked really.

    I was thinking of the same idea a while back, then thought about just buying an M3 due to power and reliabilty.

    I work on old skool turbocharged cars, I don't tend to touch newer stuff due to ECU chips and re-mapping.

    Heres a thread I started a while back

    Turbo Kit

    It might answer a few of your questions

    I have seen the bottom mounted turbo on a RHD car and seeminly the exhaust has a much better flow rather than a top mounted turbocharger.

    I am told that a 325/328i can handle up to 8psi or 350bhp on standard internals, you may need a head gasket spacer though to lower your compression.

    Cheers
    Billy
    Haha, funny you should say that! My current project is an old skool turbo





    Currently a shell :(

    And i did think about an M3, but the 328i is my daily driver because its a touring (cool and useful) and its an auto (i drive into London ever day and an auto is the way to beat traffic anger).

    So i guess its either a supercharger or a turbo, turbo being the cheaper option. Im happy with 250-280 brake and the think the auto box is right on its limits there (if driven nicely).

    Thanks for the reply buddy, i will have a read through the topic you posted.

    Rob,
     
     

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    Quote Originally Posted by Boostist View Post
    HI Rob

    I have similiar turbo plans and know a fair bit about turboing BMWs as Ive been an FI fan for years so heres some answers to your questions

    1/ No, the steering rack on a RHD car really screws using a bottom mount.
    However it is possible to reverse fit a US LHD turbo manifold so it becomes a top mount. But it may need tweaking

    2/ yes, it sounds like the right ECU
    For turbo specific tuning I would contact Nick G at 'technique tuning' in the US who may well be able to help

    Thanks very much mate! i will look up Nick G, im sure there are methods of mapping the standard ecu to deal with boost etc, i can use a piggy back but have read about problems with fault codes and the inability to retard timing, and i don't want to go after market on this car, busy doing that on the gammy ford above.

    Rob,
     
     

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    Quote Originally Posted by touringRob View Post
    Haha, funny you should say that! My current project is an old skool turbo





    Currently a shell :(

    And i did think about an M3, but the 328i is my daily driver because its a touring (cool and useful) and its an auto (i drive into London ever day and an auto is the way to beat traffic anger).

    So i guess its either a supercharger or a turbo, turbo being the cheaper option. Im happy with 250-280 brake and the think the auto box is right on its limits there (if driven nicely).

    Thanks for the reply buddy, i will have a read through the topic you posted.

    Rob,
    That's a clean looking series two, I used to have a 1988 black Series two full 90 spec too. Great as a second car, have you seen the fiesta RS on ebay at the moment, great project!

    http://cgi.ebay.co.uk/1990-FIESTA-RS...item2eac385509
     
     

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    Just found this thread in google lol, and felt bad for not replying! cheers the escort is nearly finished so i can focus on the touring after.

    I still haven't found any UK firms advertising ecu remapping for FI thinking i may have to use an additional injector/piggy back ecu for it.

    Rob,
     
     

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    Your going to have to be extra careful with turboing a euro 328 because they have an alloy block(the US got iron b28 blocks). They don't like heat and they don't like extra force(studs rip out of the block). There was a chap over in Australia who built a high horsepower alloy block m52. He used helicoils to reinforce where the studs meet the block. He also resleeved the block and used different pistons to lower the compression. He had also overhauled his cooling system and was using a motec standalone ecu.
    Even with a low boost low power setup you will be playing with fire turboing an alloy block. Also using questionable tuning that will most likely lead to some sort of detonation is not helping the situation.
    Not sure if Nick G will be able to help you find a cheap simple solution as the US use a different ecu. I'm not saying he couldn't do it though.
    If you really want to turbo the alloy block get a standalone, get custom built headers(actually there is a shop in NZ that makes them. No idea on fitment or quality and about 750NZD),get a suitable radiator, go to a lower temperature thermostat, get an alloy thermostat housing, replace all hoses including heater hoses, if you can rig up an oil cooler do so, keep the turbo in a good efficiency range, have a manual gearbox ready to go in for when the auto dies.
    ^ this is all just my opinion. You could chuck a turbo on and run it on a piggyback ecu and be fine.
     
     

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