Airbox Mod testing complete
You may recall this:
I added a quick-disconnect test port for my manometer
And a hole to route air through a euro style LH fog grill
Conclusion: the FG is a good spot to pick up. It must be at a good pressure point. Even at 18+ psi with the BMC, I get little if any pre-filter vacuum.
Next project is to put a new piece of hose (still red) and a tidier scoop behind grill.
I bring the air in the lid hole so I can easily remove the hose in bad weather.
Someone else did this and brought hose into bottom of airbox
You may recall this:

I added a quick-disconnect test port for my manometer

And a hole to route air through a euro style LH fog grill

Conclusion: the FG is a good spot to pick up. It must be at a good pressure point. Even at 18+ psi with the BMC, I get little if any pre-filter vacuum.
Next project is to put a new piece of hose (still red) and a tidier scoop behind grill.
I bring the air in the lid hole so I can easily remove the hose in bad weather.
Someone else did this and brought hose into bottom of airbox