Originally Posted by Gatelyne
I'm thinking about switching to an open element air filter system. Can I just remove the egr hose but leave tge rest of the egr system in place without ill effects?
The tube or flex hose from the mainfold to the air cleaner is there to provide hot air immidately after start up to help the fuel atomize and allow the carb or TBI to come off of start up enrichment faster as this not only causes a lot of pollution but eats rings, pistons, and cylinder bores shortening engine life by wiping what little upper end lubrication there is within any engine.
Properly working there should be a thermostatically operated valve in the air cleaner intake that opens the hot air channel when needed at cold start up and closes off that channel as the engine warms up and heat to force fuel atomization is no longer needed but the preference will be for cold outide air to enhance power output.
The trouble with open air filters is they pull in cold air when the engine is cold and needs hot air which reduces engine life; then they pull in hot under hood air when the engine is warmed up which reduces engine power.
These hot rod air cleaners look cool but are a loose/loose proposition. The factory engineers knew very well what they were doing with the original air cleaner system, you're way better to fix it so it works properly and then if you need more air to support more RPMs, bigger cam and carb, etc. then get a K&N filter that fits the housing and have the advantages of what the factory air cleaner system does for you with the higher flow rate and better cleaning of the K&N. This is a win/win proposition with longer engine life and more power. Leave the open element filters to the cool looking, clueless class of hot rodders.