[Fot] Last minute rebuild before Topeka

[Jim Gray]

Greetings FoT
The worst case scenario has happened. I raced ppir two weeks ago and  
my head gasket blew. I caught it pretty quick and inspection of the  
rod & main bearings
Showed no damage to the crank. The bearings were just beginning to  
score. The nitriding had paid off.
Unfortunately when I tore the motor down I found all the pistons badly  
damaged an two of the liners are toast.
Further investigation showed the small ends of the rods
Turned blue & red. They were new forged rods and the shop that  
balanced the rotating assembly sized them for the
Wrist pins, I didn't ask what they were sized to.
As it is the evidence points to the wrist pins siezing up and putting  
unusual forces on the pistons thus taking out the pistons & liners.  
The holes in the pistons for the wrist pins were beginning to oval. So  
my qestion is, what should be considered a racing tollerence for the  
small end bearing?
Thanks for any input.
Jim g

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