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

Standard pistons... What they good for?

Discussion in 'A3/S3 Forum (8L Chassis)' started by S3 Paul, Jul 2, 2009.

  1. S3 Paul
    Offline

    S3 Paul Well-Known Member Regional Rep

    Joined:
    Oct 27, 2006
    Messages:
    2,785
    Likes Received:
    75
    [Jul 2, 2009]
    RIght as part of my build ive looked at maybe over boring the block and using uprated pistons... Some however say the standard bores and pistons are good for 400 to 450 bhp?
    Its a BAM engine im rebuilding so with uprated IE conrods and a full rebuild on a honed block would this be good or do i need to shell out the extra to over bore by 1mm?
    Im going to be running 350bhp and then maybe upgrade the turbo to get me somewhere near 400. that will be it. Anythingelse is just over kill and not cost efective IMO.

    i need to move fast as the engine needs building soon
    The engine recon place has said the block has honed out fine and measures bang on spec,
    #1
  2. Ads

    Ads

    [Sep 21, 2014]

  3. 666markyboy
    Offline

    666markyboy Well-Known Member

    Joined:
    Mar 17, 2008
    Messages:
    1,126
    Likes Received:
    32
    [Jul 2, 2009]
    Overbore........pointless really on a turbo motor unless ytour looking for absolute max power or repairing damaged bores

    350 bhp... ??? you will need an upgraded turbo anyway never mind 400
    #2
  4. S3 Paul
    Offline

    S3 Paul Well-Known Member Regional Rep

    Joined:
    Oct 27, 2006
    Messages:
    2,785
    Likes Received:
    75
    [Jul 3, 2009]
    My car already has a jbs 05 conversion with the new top speck k04 hybrid on amoungst other things.
    #3
  5. Broken Byzan
    Offline

    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

    Joined:
    Apr 26, 2004
    Messages:
    12,604
    Likes Received:
    276
    [Jul 3, 2009]
    IIRC the std pistons are good for up to 500 bhp, they are wll made and well balanced. The rods are the weak spot
    #4
  6. Kingston
    Offline

    Kingston Member

    Joined:
    Jun 2, 2009
    Messages:
    183
    Likes Received:
    0
    [Jul 3, 2009]
    The rods at limit will withstand about 380BHP but thats at limit. If your getting to 380 or near i would change them and especially if you want 400BHP
    #5
  7. S3 Paul
    Offline

    S3 Paul Well-Known Member Regional Rep

    Joined:
    Oct 27, 2006
    Messages:
    2,785
    Likes Received:
    75
    [Jul 3, 2009]
    Im fitting IE conrods so they will see me good,
    Ive been told many times the pistons can take near 500 but the standard rods will fail around 350.
    Without Nos im not going to get to 500.
    Im thinking aim for 400 and then fine tune the handeling.
    #6

Share This Page