In our motors? Met mechanics who only use them but dont know if theyre practical outside v8 and harley applications. I have a high comp ea81 buid in progress

In my opinion this would not benefit the EA series engines. There are plenty of things you can do that don't cost much extra. If you have extra time on your hands you can take detailed measurements of everything that you re-assemble, bearing clearances, piston to cylinder wall clearance, piston ring end gaps, connecting rod weight for balance, etc. Being as anal as humanly possible try to get everything as close to the "tight end" of the factory specifications as you are able. The engine will make more power, run quieter and be more efficient. You will be more proud of it too  

Edited October 7, 20169 yr by Crazyeights

I can't think of how this could work because of the access holes for the spirolocs and wrist pins...they would pop out?