Thanks for all the informations chad. Very interesting. Unfortunately i have nothing to say about the King race shells. But why did you choose them over OEM?

Hi select. I’ve got both sets. Rod and mains. Both oem and king, haven’t decided 100 percent. Wanted to compare two completely different types, But will probably go with king on this 100k engine, but put oem in my car motor when I decide to do that engine,, price wise king’s are a lot cheaper than oem, suppliers tell me that kings would stand up better on a engine that is used more eg race engine that is kept more on higher revs for longer, But I’ve no real proof other than suppliers say so, They also claim even if shell spun wouldn’t damage crank, but personally not sure on that claim :whistle: As I’ve mentioned this is a project build to see how things turn out. So all feedback is welcome good or bad :thumbs:

Fair point regarding the price difference. Unfortunately i am no engine builder so i can not add anything of value. But one thing to consider is that this engine has worked for 100k miles so they have proved their worth more or less ;)

With these new shells you are adding a unknown variable and if it goes bust it will be very difficult to prove that it was because of the shells. But if they are of better quality while being cheaper than OEM its certainly a tough choice to make.

Hi Julian. Fair enough point regarding oem std shells. This motor had already spun a shell some 20or 30 k ago , new shells oem were fitted by a bmw tec. Good lad to,””no names””. as he did it at his home ,, it ran reasonably well up to 100k ,, though they was some of the old shell left on the crank.as crank was never taken out and any kind of polish,,,Later shells didn’t look to bad to be honest, so don’t think pickup on crank was from new shells, original shells were down to copper colour,, I’ve now polished up crank myself old style bootlace job 1000 grade wet dry and metal polish,, all still measured up ok bmw spec, looks prity good. From what I’ve vied So called professionaly polishing isn’t exactly high tech machining “Unless bmw factory done imo”. To be fair can’t really fault oem shells. But they can be suspect and fail to :whistle: Hence request for feedback king shells or other , :thumbs:

Agreed, that's a strong claim. Did they also offer you a bag of magic beans?

magic Beans would take it to over 400 hp. :thumbs:

Bit more info if anybody interested,