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Thread: How to turbo a carbureted car

  1. #1
    Frangipani
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    Default How to turbo a carbureted car

    Iv got a fiat 128 2 door wagon im restoring, its gonna be one of the very few in the world
    its gonna be real madd. I was thinking about putin a turbo in but not sure what that would all entail.
    I think that would make for a great show.


    any input would be great

  2. #2

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    Hi mate,

    You will need a carby suitable for either a Blow Thru, or Suck Thru setup.

    Basically, the turbo will blow air through the carby, as per a normal setup with a throttle body. The carby will need to be jetted according to the flow rate of the compressor. Tricky stuff to get right.

    The Draw-Thru through setup sits the carby in front of the turbo. The turbo inlet sucks an air/fuel mixture through the carby, and then compresses it.

    Cheers,
    Shazza

  3. #3
    MCM Forum Addict Beelzeboss's Avatar
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    The first thing I'd do is convert to fuel injection.
    Andrew


    1993 MX-5 - KL 2.5L V6 swapped
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  4. #4
    Hands Dirty +100kw walperstyle's Avatar
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    If you want to do it right, you should be able to read AFR and EGT's.

  5. #5

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    The easier of the 2 setups listed above is suck-through setup.
    Youll need a Turbo with a carbon seal though as you cant just throw a carby on the front of the turbo and expect it to survive with fuel running through it.

    There are side draft carbys perfect for this application. Youll also need a better fuel pump, cannot run an intercooler although you can run a water/methanol mix to cool the intake charge. Youll also have to find someone who has experience tuning these setups. carby-turbo tuning is a bit of an art.
    2012 Honda CB400 ABS. VTEC YO
    1994 Honda RVF400
    12 Hyundai IX35. Me and GF daily

  6. #6
    Banned
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    Yeah op, no offense, but there really is no point investing the money into turbocharging a carbureted engine. The gains you'll see will be minuscule compared to those of an EFI setup, not to mention with EFI you'd probably see better fuel economy as well. Take a look into fuel injecting your car, weigh the price compared to the turbo setup. If you're serious about gaining more hp, then you might as well do it the right way first, and reap the full rewards of all your hard work later.

  7. #7
    Hands Dirty +100kw Will66's Avatar
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    There are easier cars to Turbo and the Fiat 128 formed the basis of the Lada Riva which is miserable communist disgrace of a car.
    British Rotary Tarmac Terrorist since 2007.

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  8. #8

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    You can normally take a EFI engine from the same/similar model car and swap it all into yours. E.G. Take a EFI engine, ECU, Loom, Exhaust and Fuel system fron an AE92 CSi and put it in an SE - The CSi is normally EFI and the SE is Carby like mine.

  9. #9
    Hands Dirty +100kw MARK_XF UTE's Avatar
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    theres nothing wrong with going turbo with a carbied car, early dick johnson XE grand prix's had twin SU carbies, very late turbo XE's and a couple of XF's were EFI.
    Mark
    italian 100cc kart engine + 20,000 RPM......nuff said

  10. #10
    Calipers Primed
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    Another option would be a Procharger it's belt driven centrifugal supercharger they make for big as well as small motors. They work well for blow thru carberator set ups and you don't have the same heat problems you would have with a turbo... don't let them discharge you a carb is way cheaper for that car than EFI and all you need is a wide band AFI sensor in the exhaust to tune the carb for the procharger or turbo. http://www.procharger.com/SPORT_COMP..._compact.shtml

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