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Pistons and rods question - bore out?

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by Craig Cull, Sep 5, 2013.

  1. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 5, 2013]
    Hi guys,

    As you know my k04 build is on going, with the expense getting greater daily im making sure ive left no stone unturned. Mainly because I want this build to last. So after a re think I've decided I'm gonna uprate the rods and pistons, especially with the mileage on the engine, I don't wana throw a lot of my hard earned cash at it, to then blow it to smithereens in a heart beat. That simply is not an option. I'd like to do this once and do it rite.

    First of all, what size piston do I need for the standard unit, secondly can I bore it out? If I've got it in bits, surely this isn't a bad idea?

    The more the merrier really and alll the relevant Information will be very much appreciated. Needless to say the finishing date has increased, but the end result should be a definite 1 off. Cheers guys :)
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  3. solaris
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    solaris Member

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    [Sep 8, 2013]
    #2
  4. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    Thanks Solaris, I've been looking at these. They are nearly £400 cheaper than the APR variant. Rings only? Is not worth doing the pistons aswell? I've allowed for the cost of the replacement pistons. The engines done 100k, I really only wana do this once. Thanks for your reply
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  5. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Sep 9, 2013]
    there decent rods
    iv used 3 sets never a problem
    i cant see any problem with useing the oem pistons its the rods that are the weak point on this engine
    #4
  6. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    what if I want to go further tho? Ie garret gt30? Coz I have a feeling that this project isn't gonna end early. I'm gonna get bored and want more so I wana be prepared. I know it's early days but my heavy right foot is gonna want more in the long run
    #5
  7. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Sep 9, 2013]
    i was on gt30 in the black a4
    and thats still going good 40k after
    and it got booted every where with me and with the new owner

    or bite the bullet and get jbs to do one of there full rebuilds,

    what in reality are you aiming for ?
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  8. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    to be honest, the sky is the limit. I'm keeping this for good now and intend on pushing it to 450bhp - 500bhp if achievable
    #7
  9. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Sep 9, 2013]
    im not sure about the 500
    as the fuel system on this car is restricted
    the intanks got a ecu that runs it and as far as i know never been able to make it flo enough juice
    i know of one car running over 500hp in the usa with a full new fueling system and cost a good few $$$ to do
    iv done 3 big turbos first 1 2 and half years ago k04 hybrid 390hp nothing more
    gt30 and a K04 gt30 was around the 390 again anything above was fucl cuts like mad.
    unless they have sorted the intank and ecu
    to be honest i know APR are good but JBS are **** hot aswell
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  10. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    so basically I'm gonna struggle to break 400bhp. I'll just do the rods and rings then and just see how I get on. To be honest, 400 is enough, but I know I'm gonna want more. What about a 100 hp shot of nitrous?
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  11. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Sep 9, 2013]
    i wouldnt on the FSIT not heard anything good about it and was told by the tuners that i use not to bother
    but WM is good for it aslong as its mapped in right
    #10
  12. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    ok, I'll just aim for the 400 then. Do the rods, rings valves belt and water pump. Any recommendations on head gasket? Or am I safe staying OEM?
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  13. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Sep 9, 2013]
    i stayed oem
    have a read up on devils own water meth but if you go for it get the controler aswell
    and as big a tank as you can get
    works very well with the FSIT
    #12
  14. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    Fsit? My mates told me a lot about watermeth. Does it make a big difference?
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  15. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep VCDS Map User

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    [Sep 9, 2013]
    2,0Tfsi

    yes its good to have
    #14
  16. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 9, 2013]
    i thought that's what you meant but wasn't sure lol! Thanks, I wil look into it! Cheers for the input :)
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  17. Craig Cull
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    Craig Cull Well-Known Member

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    [Sep 10, 2013]
    Looking around £300? For the full kit,Is that rite? What else do I need to fit it all? A modified intercooler or intake
    #16

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