No normal cars SUCK literally, atmospheric pressure is the only thing trying to get in, ie 14.5038PSI, or 1 BAR, so they can only ever fill to a certain point dependant on their CC as this denotes the SUCTION, mechanical design then gives the CR.
When air is being forced in by a massive great air pump, or TURBO as most call them more than NATURAL suction occurs to the point of being FORCE fed this is why the same engine size with a turbo makes more power, more air is forced in the same space, along with more fuel injected, this is called a adiabatic compression ratio, if you don't believe it simply read what Geoff Kershaw writes, oh by the way doh!!
Your info was called CRAP about resistor plugs as it is well crap doh!!
Try reading a bit more instead of listening down the pub doh!!, obvious really where do you think other people learn.
I've used accidentally non resistor plugs in cars one knocked out the abs function, a good book to read is by Dave Walker all about engine management, haynes book number H835, the other about turbos and superchargers is book no 9880.
When you've read H835 you can then quote me chapter and verse to show me how wrong I am, go on you know you want to.
tabetha