Originally Posted by manbridge 74 (Post 10942625)

https://www.sae.org/publications/technical-papers/content/2017-01-1078/

Below is a quote from the above SAE document that might help with your VE calculations

“The model predictions showed a smaller pumping loss associated with the butterfly valve until 30˚ throttle opening. Between 30˚and 70˚ throttle openings, both designs have shown similar performance. However, beyond 70˚ throttle opening, a significant performance enhancement is observed with the proposed barrel type. Specifically, an increase of 34% in mass flow rate at WOT is observed as an indication of better engine performance with the proposed throttle valve design. This is particularly important for racing vehicles.”

Originally Posted by manbridge 74 (Post 10942625)

https://www.sae.org/publications/technical-papers/content/2017-01-1078/

Below is a quote from the above SAE document that might help with your VE calculations

“The model predictions showed a smaller pumping loss associated with the butterfly valve until 30˚ throttle opening. Between 30˚and 70˚ throttle openings, both designs have shown similar performance. However, beyond 70˚ throttle opening, a significant performance enhancement is observed with the proposed barrel type. Specifically, an increase of 34% in mass flow rate at WOT is observed as an indication of better engine performance with the proposed throttle valve design. This is particularly important for racing vehicles.”