I'm wondering what the cutoff for a performance engine is in terms of vacuum between the air filter and carb. You see in the industrial applications that sometimes they have a sensor to indicate a clogged filter.

I found one that is rated for 10 in. H2O and just wondered if anyone has measured the vacuum and if it's possible to notice when a filter is getting clogged or not.

Anyone, Anyone?

I can certainly feel it when the filter starts to get plugged