Originally Posted by woody
I think this area is worth a look restriction wise as there are internal direction vanes to force the air through 90 degrees.
Just some additional info...on my limited dyno runs to 5,000 rpm there was absolutely no difference in whp running with or without the engine cover, even though my filters were the originals and pretty dirty.
Simon, I had the same thought. I have looked at it as closely as I can without taking it apart and the internal vanes and flaps, etc. are indeed directional and probably force more air up the intake tubes than they could "suck" with the vanes removed (especially at lower speeds). I would like to think that the engineering is much better thought out than some give credit. As your tests have pointed out, the temps are very close to ambient when running. My simple mind cannot believe removing those items will increase airflow nor reduce temps. Looking forward to more stats from your testing.