[Fot] Oversize lifter bore

[Mark Pendergrass]

 Had the same issue this past summer with three guides. Ended up over 
sizeing the bore and put in chevy guides cause they have a nice thick 
shoulder, these babies are not going to move.
----- Original Message ----- 
From: "George Harmuth" <harmug at us.ibm.com>
To: <fot at autox.team.net>
Sent: Friday, February 04, 2011 12:58 PM
Subject: [Fot] Oversize lifter bore


>I have a spare racing engine, 1296, that broke two cams. I thought the
> first one was a bad cam blank but when the second one broke in the same
> spot, cylinder #3 intake, after 5 hours run time, we took a closer look at
> the block. It appears that there's excessive wear in the block (hole is 
> out
> of round) and the (new) lifter is cocking enough to put excessive side
> loading on the cam lob (radial fracture marks on the cam remains).
>
> I don't have the exact measurements here, the mechanic does, but we were
> discussing options. He was wondering if a sleeve could be used to get the
> bore back in spec. I was wondering if anyone here has seen this and has
> another solution. Is it possible to bore it out and use a larger lifter
> from another series engine? Custom lifters?
>
> Thanks in advance
>
> mike
>
> 63 Spitfire
> HP and HRG1
>
> G. Michael Harmuth
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe: http://autox.team.net/mailman/options/fot/mpendy@dishmail.net