[c&d]"Finished engines are spin-tested. This is where the crank is spun on a dyno"

[arsenalrocks]

http://www.caranddriver.com/flipboo...lding-the-ford-mustang-shelby-gt350s-engine#9

what is "spin-tested"? just spin the crank without actually firing the engine?

but they did say on the dyno, if that is the case then does it mean the engine is already broken in?

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[TDC]

Engine is spun by external drive (not fired up under its own power).

 

[arsenalrocks]

that is what I understood as well...just spin it using external tools to max RPM.

but then why do they say 'dyno', maybe there is a dyno to measure vibration instead of horsepower?

Engine is spun by external drive (not fired up under its own power).

 

[Spa2k]

The machine they use (the "dyno") spins the crank just fast enough to prelube all the parts. It has nothing to do with break-in, although it helps ensure there's no unwanted metal to metal contact on first startup. And I'll bet it's not to the redline - just enough to get the juices flowing.

 

[Trackaholic]

The machine they use (the "dyno") spins the crank just fast enough to prelube all the parts. It has nothing to do with break-in, although it helps ensure there's no unwanted metal to metal contact on first startup. And I'll bet it's not to the redline - just enough to get the juices flowing.

It's probably testing friction as well, by measuring the torque required to spin the engine at a prescribed speed.

-T

 

[GT Pony]

It's probably testing friction as well, by measuring the torque required to spin the engine at a prescribed speed.

-T

Probably so ... it's a good health check of the mechanical assembly. Too much friction required to turn X RPM and something might be wrong.

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