Cams choice, Low CR vs VE%

It is all about the exhaust scavenging effect that starts at mid RPM. If you are always operating up in the mid to high RPM's, then the DCR becomes less important. The exhaust scavenging makes the VE's approach 1 regardless. Drag racing with a higher stall TC is a prefect example; you don't want to spend any time at low RPM's; that won't get you anywhere! And some folks want high RPM hooliganism on the streets LOL

If you want the torque band to start in low RPM's where the exhaust scavenging effect has died off, then the engine is just a simple low RPM air pump and evaluation of DCR becomes important if you are going to maintain good torque down in the low RPM's. Street cruising and some forms of racing emphasize a wider torque range engine design.

We all know that too low a static CR and too much cam ends up with too low a DCR for a car/engine to get out of it's own way at low RPM's. There have been plenty of threads here of someone heading down that road and not realizing that will be the case. I would hope that telling folks the why's and offering an explanation and help to see the numbers would not be a problem; if the builder decides that budget dictates the compromise of CR and they can live with it, that is fine. At least they are going into the situation with their eyes open. And they may decide to make a cam or other change to better mitigate the low rpm torque loss, if that is important to them.

Any customer-oriented engine builder will first explore what the customer wants to use the car/engine for (figure out the application), and then help them make the best decisions to get there.