Excessive side clearance will cost hp from adding more windage in the crankcase, it will also lower oil psi due to the clearance being larger. The oil has to go somewhere. I wouldn't bandaid an issue with excessive rod side clearance.
Now it's not huge hp being eaten up but it all adds up.
I learned this from an accomplished stock/superstock engine builder a long time ago.
What is the clearance at now?
Old wives tale. And a long time ago, that was accepted. Side clearance is not relevant to keeping oil on the crank. Get the weight out of the rod and the pin. You do have to use the correct piston design to control the rod.
![[Linked Image]](https://www.speednik.com/wp-content/blogs.dir/1/files/2018/09/the-great-rod-side-clearance-imbroglio-clearing-up-the-confusion-2018-09-06_22-32-00_485642.jpg)
![[Linked Image]](https://www.speednik.com/wp-content/blogs.dir/1/files/2018/09/the-great-rod-side-clearance-imbroglio-clearing-up-the-confusion-2018-09-06_22-53-41_536870.jpg)
