KB's in a 318 with No Re-balance

I actually wrote KB and asked if they could make a heavier pin or a heavier piston. Never thought about a taller cast piston. They said they would consider it. But I never expected it to happen... and I have not been dissappointed LOL.

IDK if you could get the needed weight with an AL insert; you need to end up in the 210 gram range IIRC. And the expansion difference would seem to be an issue. But, some Formula 1 engine builders used a hybrid AL/steel pin for a while, so it is not a new idea and has been used in a high stress application. I'd personally rather stick with the same materials and keep the lengths equal so the pin flexing does not have any discontinuities. And I don't think you can count on the locks, at least in their common forms.

Speaking of which, pin flexing and the effect on the retaining compound is a thought.... These compounds get used regularly to put bearing repair sleeves in machinery systems so they work with some level of vibration, etc.