Dynojet data for sr20ve vs sr20de engines:
SR20VE with a stock cam, near 90% or 100% VE easily due to excellent design
SR20VE with what I assume is some kind of "cam upgrade" making nearly the same exact VE and thus torque:
The Volumetric efficiency(VE) did not improve much, and as expected with a 'cam upgrade' the cylinder pressure is lower in some early rpm area because Volumetric Eff suffers in the low RPM ranges due to the effect of a larger cam on almost all engines.
Next, SR20DE engines fully modded out to show near 100%Volumetric Efficiency for comparison:
Conclusion:
All 2.0L engines whether sr20de or sr20ve produce similar peak Volumetric efficiency, and we can tell this by comparing their peak torques with each other. The DE engine is not inferior to the VE Engine in terms of cylinder pressure, torque capability, or Volumetric efficiency (also called VE).
Despite an overwhelming number of variables which interplay with dynojet (humidity, temp, altitude, engine wear, age, etc...) ALL 2.0L engine display similar Volumetric efficiency and Torque capability regardless of manufacturer or model.