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    Craig Cull's Avatar
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    Pistons and rods question - bore out?

    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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    solaris's Avatar
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    Pistons and rods question - bore out?

    If your sticking with the KO4 "drop-in-rods" should suffice. Stick with the std pistons but get the rings etc changed when the work is done. I would recommend using the Integrated Engineering rods and getting them riffle drilled too.
    http://www.jbsautodesigns.co.uk/prod...rod-for-20tfsi
    If it's not longitudinal and it's not Quattro..it's not an Audi
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    2005 A4 DTM 2.0 TFSi Quattro :364Bhp/477NM - Mapped by MRC Tuning
    Hybrid K04 Project ongoing (link to Build thread)

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    Craig Cull's Avatar
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    Quote Originally Posted by solaris View Post
    If your sticking with the KO4 "drop-in-rods" should suffice. Stick with the std pistons but get the rings etc changed when the work is done. I would recommend using the Integrated Engineering rods and getting them riffle drilled too.
    Forged Con-Rod for 2.0TFSi - JBS
    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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    bez101's Avatar
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    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

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    Quote Originally Posted by bez101 View Post
    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
    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

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    bez101's Avatar
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    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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    Quote Originally Posted by bez101 View Post
    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 ?
    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

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    bez101's Avatar
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    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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    Quote Originally Posted by bez101 View Post
    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
    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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    bez101's Avatar
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    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

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    Quote Originally Posted by bez101 View Post
    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
    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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    bez101's Avatar
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    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

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    Fsit? My mates told me a lot about watermeth. Does it make a big difference?

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    2,0Tfsi

    yes its good to have

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    Quote Originally Posted by bez101 View Post
    2,0Tfsi

    yes its good to have
    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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    Quote Originally Posted by bez101 View Post
    2,0Tfsi

    yes its good to have
    Looking around £300? For the full kit,Is that rite? What else do I need to fit it all? A modified intercooler or intake
    K04 hybrid turbo. S3 injectors, Autotech hpfp internals, RS4 fuel pressure regulator, custom FMIC, APR carbonio intake, decat pipe, milltek cat back non resonated 100mm tips, unicorn developments custom remap, launch control and flat shift. Valet mode, economy map and full power map options. Stage 3 southbend clutch with single mass flywheel, Eibach pro street coilovers, eibach front and rear anti roll bars, porsche cayenne 6 pot calipers front, S4 rear brake conversion.


 

 

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