Quote:
Originally Posted by Jack B
I have some of the actual development curves (Bosch sells the CD) and they rely heavily on scavenging in the mid rpm range to increase torque. There are so many things happening that we don't know. I looked at that curve forever. I will look at it again a post again relative to this topic.
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The scavenging they're referring to probably between the engine and the turbo and not after the turbo. Because I would think that once it reaches the turbo and passes through it you're introducing a huge variety of varying conditions that would make pressures post turbo very difficult to calculate/rely on. Especially since the turbo itself will act as an agent to increase the back pressure. It's probably more important on NA DI engines, I wouldn't be surprised if they were even more sensitive to back pressure then normal NA engines.
