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Bigger injectors for a S3

Discussion in 'A3/S3 Forum (8L Chassis)' started by Andrew@A.L.D, Jun 28, 2010.

  1. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jun 28, 2010]
    Just doing some prep work for the S3 before it goes in for mapping

    Got a 4 bar fuel pressure reg on hand but i need some 440cc or bigger fuel injectors as my injectors will be maxing out when mapped as Badger said.

    looking to keep cost down so had anyone used ones from another make or model car?

    I have heard of Audi S4, Vipers, Cossie Greens and Vauxhal VX ones?
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  3. Chlippo
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    Chlippo Member

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    [Jun 29, 2010]
    i say post in the S4 section of this forum so we can know how much does their injector flow. if its S4 i would say its easy and not very expensive to get
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  4. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jul 1, 2010]
    #3
  5. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jul 3, 2010]
    Just ordered my so i think fueling will be on the safe side now

    They are meant to be 470cc at 3 bar i have been told not 440cc?, i have a 4 bar reg on standby if i need more fuel but i think the fuel pump will also be the weak point
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  6. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jul 6, 2010]
    Well i got them today

    [​IMG]

    They are a full set of VXR fuel injectors

    The bosch part number is right 0280156280
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  7. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Jul 6, 2010]
    cool
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  8. Chlippo
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    [Jul 6, 2010]
    ive been reading that stock injectors get maxxed out at stage 2 on a regular k04. thats being true?
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  9. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jul 6, 2010]
    You can also get them from Vauxhall themselves but it is cheaper to get them with the rail and reg at £117+Vat part number 55556798

    spec of these are

    470cc at 3.0 bar
    575cc at 4.5 bar

    resistance 14.2 Ohm

    Bosch 0280156280

    4 hole configuraion
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  10. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jul 6, 2010]
    I think badger said the will max out at 320bhp ish on 3 bar but the fuel pump doesn't like 4 bar over a period of time the pump may fail, its best to keep the 3 bar pressure and swap the injectors
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