1.5/16 Sports Rods

[Terrytuned]

Bob the first photo this crank had been raced for 5yrs and it was from a friends car, I was only sent the photo. The 2nd crank about the same age I removed from the broken c/case this photo shows the break before dismantling, both were 1"5.16, I would not advise anyone to race with a 1"5.16 they have a limited life.
  Terry.

[Bob Culver]

Thanks terry
Fast progressing fatigue cracks are often hard to judge but the photo appears as usual to start from the inside. A failure near the middle of crank could reasonably be expected to start from the outside, hence my curiosity.

[Robert Foreman]

Hello Gene, 
the fault is the little ends are drilled underneath on the thrust side leading to wear. If they are more than a couple of tenths of a thou oversize then new oversize pins will be required. 
  Personally I wouldn't use any original sports rods with the advent of beautifully designed and made new ones.