Originally Posted by
let-r-eat
Your high volume pump isn't the culprit.. A high volume pump pumps the same amount of oil as a standard pump, the difference is it's CAPABLE of pumping more if necessary.The problem more than likely wasn't the clearances you used although a little tight but the failure to get oil to the bearing under running conditions. ie pickup too close to pan, oil drainback inefficient, over heat from insufficient cooling, detonation from too much timing, etc. An engine with tight clearances doesn't like to be overheated.Someone a whole lot smarter than me showed me something that stuck with me. He took a crank and warmed it to 200*. Took the rod and heated it to 200*.....Then measure clearances.....You will quickly see that things don't stay where even the best machinists put the tolerances. A whole bunch of this (not a nice word)(not a nice word)(not a nice word)(not a nice word) you read is hockus pockus to sell parts. I've ran cranks at 10 thousands *of course this isn't recommended* clearance with no ill effects. Looser will always be better than tight as long as you can maintain required pressure to lubricate. Too lose requires HP to move the oil and require oil pumps capable of the task.