Not an Explorer but I would call this a major failure.
http://www.schexnayderracing.com/dyno/9-parts-fail-sometimes
http://www.schexnayderracing.com/dyno/9-parts-fail-sometimes
I’m surprised they don’t have some fire suppression directly above the engine bay.
@shucker1
I did a bunch of systems upgrades at a major aerospace manufacturer. They had test rigs between 500-800hp that were designed to test then bearings they manufactured. They also had 8 rigs that load tested the single balls and separate rigs to test the bearing races.@shucker1
I worked in a dyno test lab for a number of years, with 3 dynos running each capable of having an engine ready at either end of the dyno shaft. Never once had a fire, but one incident, happened at around midnight, an END-864 Mack Truck engine, big V-8, threw a rod through it's block, the rod was about as thick as my wrist! Pieces of the block and pistons were thrown the length of the dyno room, some embedded in the block wall!
Night guy, working alone, it scared be-Jesus out of him, he quit the next day! imp
I worked in a dyno test lab for a number of years, with 3 dynos running each capable of having an engine ready at either end of the dyno shaft. Never once had a fire, but one incident, happened at around midnight, an END-864 Mack Truck engine, big V-8, threw a rod through it's block, the rod was about as thick as my wrist! Pieces of the block and pistons were thrown the length of the dyno room, some embedded in the block wall!