why did the big end go?

[aussiebruce]

It's a 1986 Audi quattro turbo that has had quite a lot of work done to her to run 386up. I know it's not that much for a Quattro, but tried to keep it driveable on the track. Boost comes in at 3 1/2 grand etc.

Anyway after a track day last week end No3 big end 5h1t itself big time. I wasn't driving it at the time so not too sure what happened.

Now i'm kinda wondering what would cause it to go? Is it lack of oil, oil too hot or over reving? I can't tell about lack of oil as the strainer is full of big end so there are signs of lack of oil every where. (the guy kept driving inspite of the death rattle)

Yes, she has a rev limiter, but it dosent work when you're change down.

thanks for any thoughts