No combustion -> No pressure increase in the cylinder -> less exhaust backpressure -> less remaining pressure in the cylinder as the exhaust valve closes -> less pressure in the cylinder as the intake valve opens -> more air into the cylinder -> drop in MAP, even with everything else remaining constant.
That is quite correct for US manufactured engines that I have referenced previously.
411A............your answer is WRONG !
I've been there, I've seen it and I've done it - probably before you !
Quite likely not, and as we can see from the above from
ft, virgo must have been sleeping during his claimed ops....such as they might have been.
