Recall this thread?
Soft head/ head gasket sealing problems explained
Turbo Louie has a fix for the head bolt boss problems.
If an aluminum alloy casting is flawed/porous / has weak areas not much you can do.Those issues are design/production flaws.
If the 356 T6 heat treat is not right or going away........ .
Aluminum alloy heads that get welded on for mods or repairs need to be properly re-heat treated , pressure tested & dye penetrant checked.
Plan on swinging for the fences with a particular set of heads? They need to be thoroughly tested before any work on them begins.
Racers pushing the envelope on parts that were not originally designed to withstand the stresses and power levels being achieved are going to find all the weak pieces.
Over the years the top fuel & top alcohol racers have proven that with out a doubt, even with all the super parts they now use just to be able to go a round or two.
You name it, they have destroyed it .
& everything else from the bell housing out to the rear wheels.
I don't care who makes it, determined racers will eventually blow it up. LOL
Yes there are bad runs of parts & QC issues (they all have had them) failures need to be returned to the respective manufacturers for forensic analysis if they are serious about improving on their own products.
High powered door car racers are experiencing the same destructive testing woes.
Just this weekend KB racing appeared to destroy an engine in the final round of PS at Pomona.NA no power adder & they have the best of everything.
They are not going to start throwing their parts suppliers under the bus on the internet.
They will work with them to solve the problems.
If It Breaks,Make IT Stronger.
If It Does Not Break , Make It Lighter.