Posted 9/10/2013 20:35 (#3320476 - in reply to #3320020) Subject: Restriction indicators
Hazelton, Kansas
Gerald,
I think most of the filter indicators trip at 20-25 inches of water. That is a little less than 1 psi restriction.
If the engine is turbocharged, the turbo should spool up slightly and make up most of that. So there shouldn't be much performance reduction up to that point.
My thoughts on the air filter blaster
