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Spitfire The Spit head saga continues

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The lifters in my original, 150k mile engine did not look like those. But it last ran in January 2001. The first set of lifters in my hot rodded engine looked like that after 500 miles in August of 2001. Not all of them, only a few. Tons of cam lube and tried and true break in methods. Those were definitely from poor quality parts. Since Paul's were the original lifters from Jolly Ol' it would seem it was more ZDDP related than defective parts quality.
 
Brosky said:
Those were the original lifters.
Click to expand...
Which only means that BL also got bad parts sometimes; or that something was done to the engine to increase stress on the lifters. That is still a materials failure, not scuffing fron inadequate lubrication but spalling from the surface being loaded beyond what it could carry. And not something that ZDDP is going to help.

If you scroll to the bottom of
https://www.camshafteng.com.au/fail.htm
you'll see a microphotograph of exactly the sort of failure you saw.
 
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