Actually I should have told you a little more about this engine. It did have a bit of work done to it to raise the compression and increase both fuel and air. However, as it was on the test stand and was to be destroyed (military surplus that was to be destroyed prior to disposal) - our instructor showed us what happens with a runaway diesel. I used a pick to puncture and slightly rip one of the blower seals. Once she got the taste of her own crankcase oil she started to hunt a bit. We went through the checklist and shut off the fuel supply.. The engine just about died as it was registering belowe 500 RPM on the test cell's tachometer. Then she started to grunt an started knocking very loudly.. Faster and faster. We shut off the air intake and a moment later the flex hose ( like that used in brake ducting ) ripped as it was very old and tattered.. It only took a minute for the engine to reach about 4500 RPM and our instructor was a bit frantic and chased us out of the test cell while he continued to try and shut her down. She held 36 quarts of oil as I recall. He finally left the cell when she was freewheeling at 5000. He applied full load to the water brake and she only dropped a few hundred RPM. God only knows how much torque she was making.
The tach in the test cell only went to 6500 RPM and she went screaming well past that before oil pressure was lost and the whole side of the block exploded. The reciprocating assembly was in a few dozen more pieces than it was designed to be in. Once the room cleared of the smoke and firefighting powder, I was one of the chosen that got to clean that mess up.
So yes, they will rev.. But they can only take soooo much...
Randy,
The first time you told me about that I could feel my butt pucker and it hasn't gotten any better
I know my 6-71 redlines at 2150 and I can't conceive of the racket that must have made as it was winding out of control. Time to go check the emergency flap over my blower inlet.....
