Engine dyno testing a 440 stroker bracket motor with a Eddy tunnel ram with two 750 Holey mounted side ways with and with out velocity stacks with 9x3 air cleaner elements on top made more HP and torque than with the stacks and no air cleaners, years ago
The dyno operator said it would loose power with them before that pull but the owner wanted to run them on the car so he didn't need a hood scoop, it made more horse power and torque and made the AFR slightly better
Same thing at the 1/4 mile races wit the air cleaners on the velocity stacks versus slower without them