Recently, Larry Dighera posted:

On Mon, 23 Jul 2007 17:33:21 -0500, Big John
wrote in :

Larry

The Merlin could be throttle bursted (Idle to full throttle as fast
as you could move it) and you would have full power, 3000 rpm and 61
inche3s in 1 to 1 1/2 seconds. Only engine I ever flew with that kind
of response to throttle movement.

I would characterize that as a very significant latency in power
response to throttle control input.

Compared to what? I can't think of any engine that responds more quickly
than that.

Neil
(not a P-51 pilot, but my father was...)