HD Forums Australia
Home
Online: Hilly
Topics

which way to go....

  • bundy bruiser
    bundy bruiser
    6 years ago
    I have a 2012 FLD, 103 with D&D fatcat, HD breather, and SE race tuner. It has done 22K KMS
    I have a set of Andrews 54 cams, new lifters and pushrods to go in very shortly and I am wondering what to do to the motor. The general view is that these cams like 10-10.2:1 compression.
    Should I get my cylinders bored to 107 to get the desired compression or just mill the heads? I was thinking about getting some headwork done also.
    I mostly ride spirited highway and like a nice fat torque range but would also like decent acceleration around town
    I will be getting it tuned after mods
    Cheers
  • Illustrated_Man
    Illustrated_Man
    6 years ago
    A haunted highway?
  • JFE
    JFE
    6 years ago
    Childers is haunted. It’s a policy of mine to always have enough fuel to speed through that part of Qld. 
    No amount of XXXX makes that shit right. Fact. 
  • bundy bruiser
    bundy bruiser
    6 years ago
    yes
  • tussuck
    tussuck
    6 years ago

    I'm confused (its a normal state for me though).

    Milling the heads will increase the compression on your 103 somewhat although I have no idea what the starting compression is to begin with.  Boring out to 107 is going to need new pistons etc so I suppose you could get high comp ones to suit the cam.

    In all honesty it needs to come together as a 'matched package' in order to see good results.

  • fatbat
    fatbat
    6 years ago
    Best value for money for midrange torque is bore out you cylinders to 107, buy pistons to get to 10.2 if possible. Even pistons to get to 10.0 would work with a thinner head gasket 
  • Gnoo
    Gnoo
    6 years ago

    106 with flat top pistons and 30 thou head gasket

    will get you right on the money for 54H cam.

    Head work, oh yes.

Topics