Quote: You are right I'm pretty much a novice at this but I'll stand by what I said a 440 turbo'd car is not going to create any boost at highway speeds under zero load..
At highway speeds you are going to be under some sort of load short of coasting down a hill.
zero load and highway speeds are mutually exclusive as it takes "x" amount of power to run at speed mph due to mass and frontal area.
My Reliant takes 50 more hp to cut through the air at 140 mph compared to a Charger just due to frontal area alone.
As I already pointed out, some cars will make boost just off idle and gave an example. SRT-4's are notorious for it.
Most turbochargers are regulated by boost pressure- Most waste gates don't open till target boost levels are/almost achieved. Minimum boost on my Daytona was 12 psi, maximum was 30 (all of it setting)
