1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Injectors 800cc?

S3Zek Jul 22, 2012

  1. S3Zek

    S3Zek Member

    410
    11
    18
    I'm trying to find out what injectors i need and the best place & price to get them, What size and make do you guys run for 400-500hp? Would I be right in thinking 800cc? Many Thanks :)
     
  2. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

    3,879
    617
    113
    870's for me at 440bhp so far but still have loads more to go, i would like to see near 600

    what spec of engine will it be

    welly is on 630's
     
  3. S3Zek

    S3Zek Member

    410
    11
    18
    Rods pistons, arp stud and nut arp mains, large port head, superteck valve gear, large front mount, in line fuel pump, top mount mani with poss a gt3071r or there abouts so 400+ is what I would like if it is poss from that
     
  4. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

    3,879
    617
    113
    arp's main and head studs are a bit over kill but you might want to get some uprated valve springs

    Welly is running standard gear on a 440 bhp with 630 cc also, his is a good example of what the standard stuff can cope with
     
  5. BuuBBa

    BuuBBa Member

    133
    3
    18
    870's with 100% duty cycle can take You around 540hp..
     
  6. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

    3,879
    617
    113
    That's at 3 bar they will do that

    I do have a 4 bar fpr and a adjustable one that goes upto 5 bar so I still have more
     
  7. BuuBBa

    BuuBBa Member

    133
    3
    18
    Yep.. With 4bar those flow about 920cc. What pumps You are running?
     
  8. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    hmmmm
    mine was max'd out a little less than that in practice on 870cc @ 3bar
    bsfc calc a little skewed
     
  9. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

    3,879
    617
    113
    standard in tank pump and performance inline one also
     
  10. jamieA3

    jamieA3 Member

    150
    5
    16
    Rods pistons, arp stud and nut arp mains, large port head, superteck valve gear, large front mount, in line fuel pump, top mount mani with poss a gt3071r

    how do you enter that on confused.com quotes lol
     
  11. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    stock S3 pump flows 3.3ltr/min no load
    bare this in mind if not using a swirl pot as a buffer capacity
     
  12. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    gt3071 620cc is adequate..
     
  13. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

    3,879
    617
    113
    Do you recommend a swirl pot for my set up?
     
  14. BuuBBa

    BuuBBa Member

    133
    3
    18
    At which power in practice? Just curious..
    I used bsfc .63 and meant crank hp.
     
  15. BuuBBa

    BuuBBa Member

    133
    3
    18
    Please specify this "performance inline pump".
     
  16. Andrew@A.L.D

    Andrew@A.L.D May add NOS to 600+bhp S3.

    3,879
    617
    113
    DA-31 Tuffty is also using one in his
     
  17. S3Zek

    S3Zek Member

    410
    11
    18
    should I go a little bigger just to be on the safe side?
     
  18. S3Zek

    S3Zek Member

    410
    11
    18
    Lol will soon find out in a few months ;) must admit I'm not looking forward to the responses lol,
    How much bhp in ur a3 sir!!!!!.......is it for the road?!!!!! Lol
     
    Last edited: Jul 23, 2012
  19. superkarl

    superkarl MAN OF STEEL

    9,495
    2,436
    113
    adequate probably means 10-15% headroom, which i think is what you should run at for egt protection and incase of any problems.
    so im sure bill has taken that into account in sayng 620 is adequate. i suppose it depends whether you might get bored and want more. but even bigger injectors can upset driveability, or so i've read.
     
  20. S3Zek

    S3Zek Member

    410
    11
    18
    Ok, cool thanks for that.
     
  21. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    you're on stock fuel rail I guess?
    I would be checking fuel pressure @ rail when doing the max power runs on your 550+bhp aims
    thats a lot of fuel demand through a 6mm ID fuel line
     

Share This Page