Engine Test Stand

How bad did it move around on you on start up?
I built one about the same size and had to jack it up on cinder blocks, because on the casters I was chasing it around the garage.

Two casters are lockable... IT didn't move at all, I was expecting some rocking side to side while I burped the throttle... but it was very solid.
I was pretty busy watching the gauges and everything during break-in, but I had a go pro and a digital camcorder recording it, and the engine was pretty solid when I watched the videos later
The gauge pod shook around a little due to the height of it, the lope of the cam and me rappin on it :)

505 Cuda engine on test stand 6.png