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    #21
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    See turbo is more common here in the UK but the supercharger seems to offer the best bang for buck - any links to any turbo resources as I personally couldn't find any sub 10,000 USD and also found that they require lower compression heads..
     
     

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    what about something like this

    http://cgi.ebay.com/ebaymotors/BMW-9...Q5fAccessories

    or even this

    http://cgi.ebay.com/ebaymotors/1994-...Q5fAccessories

    thats sooo cheap it hurts !!


    not sure why turbo would need lower comp if you are boosting at the same rate as a s/c, the engine only see's boost. true you would need to go l/c if boosting more than say 11-12psi constantly, but under that the engines knock sensors should take care of ignition mapping to a degree
    Z3
     
     

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    #23
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    ^ jesus christ allmighty I don't quite believe it! I hadn't looked into Turbo tuning because I came across a few results in the states for like 10-15k! I must have been looking at different level kit!

    so sub £1,000 I can get the kit I am pretty sure I read somewhere these cars have issues with turbo's on the ecu not exactly sure but this certainly calls for more investigation into exactly what is required as those kits are so much cheaper than a supercharger.

    So now I can't see why there is a debate over s/c and t/c on these engines other than a full power band of power with an s/c but I am pretty sure the t/c as a general rule of thumb will always offer higher bhp but at the top end of the rev range.

    I am taken away by this thanks for the information!
     
     

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    #24
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    Doing some research into those ebay kits and two things stand out which are pretty worrying.

    Reports of turbo blades shattering and entering the engine, and weak manifolds braking very often.

    aware of any one here running these kits?
     
     

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    just wandering mate how you got on with your boosting? weather or not you went for it or not? turbo ? super charger? ,, i have done alot of reasearch my self and not really found any easy diy options there lol
     
     

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    To be honest there isn't an easy DIY, all require expensive components and if pushing big boost new internals = ££££.

    I still would like to, some day, but not for now.

    Supercharging look around £5k as a starting point!
    Making my own luck since 1987.

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    Doesn't seem like an easy DIY, and would cost many thousands if you want it done properly. Anyone know otherwise?

    Quote Originally Posted by jtsystems View Post
    Supercharging look around £5k as a starting point!
    5k extra could get you a faster car in the first place!
     
     

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    yehh was just reading up and was just curious how you got on, didnt think there was an easy option otherwise everyone would be doing it, i aint too bothered with my 330s power so i dont mind not charging for a while, il stick with the handling for a while lol
     
     

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    Quote Originally Posted by markrnorton View Post
    not sure why turbo would need lower comp if you are boosting at the same rate as a s/c, the engine only see's boost. true you would need to go l/c if boosting more than say 11-12psi constantly, but under that the engines knock sensors should take care of ignition mapping to a degree

    Reason most go for lower compression is the engine is originally designed as naturally aspirated, therefore has a relatively high compression ratio to a factory forced induction engine. The high compression is there to create more vacuum for the engine to 'suck' in the air it needs...and forced induction is well...forced.
    Yes the engine only sees the air pressure, but by also lowering the engines compression, you also increase the amount of air that can be forced into the combustion chamber during each cycle. More air and fuel offers bigger bang, more power and a nice smile on the driver's face. High octane fuel will reduce pre-det to a degree, but a proper hands on remap would be needed as the car would happily detonate itself to death given the chance
     
     

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    not an easy DIY, you'll need some people in the know and equipment....

    to be honest our cars aren't really designed or have the easy "snap on" ability that a hot hatch may have for super speed.

    What we do have is some refined engineering which makes driving an absolute pleasure combine that with the super smooth straight 6 engine that chews up the Autobahn and we've got a fantastic car.

    By getting a remap, some better breathing, you can turn this into a subtle beast on its own accord and provide an amazing driving experience.

    In other words there will still be the little tit in his turbo'd fiesta thinking he rules the road but when it comes to an "every day" car they have nothing on you and when they crash they'll turn into a sardine tin.

    If you want the track destroyer get the M3 or be prepared to spend more than M3 money on yours.
    Making my own luck since 1987.

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