Oil Filter-ology

[aussie merc]

me again my only concern is oil flow in the flathead was never designed to accommodate a full flow filter ive seen some mods done but still wonder if they actually flow suffient oil and in fact causing a problem in the long run due to reduced oil flow inside the engine

[Ronnieroadster]

Originally Posted by aussie merc

me again my only concern is oil flow in the flathead was never designed to accommodate a full flow filter ive seen some mods done but still wonder if they actually flow suffient oil and in fact causing a problem in the long run due to reduced oil flow inside the engine

You can put your concerns to rest. The oil conversion where the oil is pumped to a remote filter and then returned to the engine directly into the original internal passage will NOT cause any short or long term problems. I know from personal experience having converted many engine's for others as well as my high mileage daily driver. To date two round trip cross country journeys with absolutely no issues and that includes feeding the oil to a set of original ARDUN heads.

The Ford flathead internal oil cross passage measures .421 in diameter that's the largest internal passage. When I do the conversion I make sure all of the fittings I use match's the .421 internal dimension. The oil lines used are 1/2 internal diameter. The correct oil filter to use is the Ford Motorcraft FL-1A this filter will not restrict the flow its a perfect filter for this type of conversion.
Point is when you do the conversion simple back yard hot rod ingenuity is all it takes to get it right so the engine will survive.
Ronnieroadster