172 Track Car Engine rebuild tips

Hello Everyone ,
This is my first post, after alot of work on the track car, fitting a replacement engine that had cat cams and a few other bits on, I got it tuned by Chris at EFI and manged to get 200bhp. Absolutely spot on great drive on track and after a few other jobs it was brilliant. Afternoon session not going mad then bang, the fatal throwing a leg out through the block. Right on the oil filter housing. Nothing to do with the remap of course as Chris is a legend of the tuning world just unlucky it went on me outon track. A few of my mates race Clios and its a common thing apparently.
I'm going to have to rebuild the engine ( my mechanic mate will be mainly) , I have a bottom end, I've been advised 197 pistons and rods , polish the crank shaft, king racing bearings etc, not looking at any more power than it has, heard that the bigger oil pump helps also and possibly a baffled sump.
Any other suggestions to hopefully prevent it happening again.

How common is this problem and what is the consensus on the root cause?

I am following a similar path but with ITBs as well, hoping for ~210, worried I'm going to throw a rod out the casing on my first trackday.

Struggler said:

How common is this problem and what is the consensus on the root cause?

I am following a similar path but with ITBs as well, hoping for ~210, worried I'm going to throw a rod out the casing on my first trackday.

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Seems very common, my mate races and he has ITBs and his thrown a rod on sighting lap, forged rods definitely if affordable, I get told they can be a ticking timebof regarding throwing Rods, I've gone 197 rods and pistons and uprated bearings , shells and the all important upgraded oil pump .

Prolonged high rpm, oil starvation etc. Could well be worth having a good look at the breathers and oil flow back to the sump, if too much oil is accumulating in the head and not flowing back fast enough you'll starve the bottom end.

I know a while back some people were just running standard unopened engines, when it went pop they threw another in. Back when you could get 10x stock lumps for the price of one fully built unit.