[Fot] Line-boring

[Dennis DeLap]

Glen - I just got back from VIR - so missed this thread.  Is line boring common and/or advisable for a race engine?  Other amici comments - how many line bored blocks are out there??  What is actually modified to make the rear seal center up after a line bore?
   
  Thanks
  Dennis
  b.t.w. - if you are ever looking for an early spring event, or if VIR is on your list of tracks to race - Mike Jackson's VDCA event is a must do.

Fubog1 at aol.com wrote:
  In a message dated 4/9/2007 4:15:32 PM Eastern Daylight Time, Fubog1 at aol.com 
writes:

Are the main seal upgrade kits worth the trouble/expense?


In my opinion yes but the housings sometimes need a bit of fitting, 
depending on how much the crank center has been changed due to line-boring.
My reply wasn't very clear so let me add that that isn't so much the crank 
center being changed that affects the fitting of it, it's mainly that when the 
housing bore is redone it closes up the housing bore into which the seal 
housing registers. It makes it slightly elliptical & the OD of the seal housing 
is essentially too big to fit properly. They usually need some metal removal 
in order to get them concentric with the shaft & a good fit in the housing 
bore.
Glen






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