[RoelS]

I just checked them with my attached fingernail, and I couldn’t feel them.
So I guess I’m good to go.

 

[RoelS]

Did you inspect the main bearings, your carbon build up is pretty normal toward the top of the cylinder but you notice a clean area why was this area clean? crank movement causing vibration?
rod bearings?
I would change both rod and crank bearings to be safe.

i haven‘t split the cases yet, so I don’t know the exact cause of the vibration yet. But my guess is that the crank is mismatched to the rest of the rotating assembly.
It is an SPS engine, but the crank has been swapped for a normal 996 one as my ECU is a 16M which doesn‘t have the dual pickup of the SPS crank. I think (read: I’m sure) that the guy who built the engine didn’t have it balanced.

Thanks for the tip on replacing the bearings; I was on the fence about it, but now I’ll be sure to do it.
I’m also considering a 900 SSie crank, to increase the capacity. I have a lead on one, which is not too expensive.

Any other tips as I dive further in this project?

 

[RoelS]

I already have a set of SPS cams installed