The Ford Barn

tubman · 08-28-2016, 10:16 AM

I don't want to hijack someone else's thread, so I'll start a new one. In my adventures with the Edmunds heads on my '51 Merc I've had them off a couple of times. To make it easier, I ran it with out the oil filter for the interim runs. I just connected the mechanical gauge to the filter port. This is an engine with a stock bypass filter. I checked and the filter housing and fittings and it does have the proper restrictor fitting installed. I couldn't help but notice there was a difference in oil pressure with and without the filter. Plumbed direct, it registered 45 lbs cold at 2000 RPM. With the filter hooked up, it was right about 40 lbs at the same speed. I haven't really thought about why this would be, but I thought it was kinda interesting.

08-28-2016, 10:16 AM	#1
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 12,132	Oil pressure differential due to filter I don't want to hijack someone else's thread, so I'll start a new one. In my adventures with the Edmunds heads on my '51 Merc I've had them off a couple of times. To make it easier, I ran it with out the oil filter for the interim runs. I just connected the mechanical gauge to the filter port. This is an engine with a stock bypass filter. I checked and the filter housing and fittings and it does have the proper restrictor fitting installed. I couldn't help but notice there was a difference in oil pressure with and without the filter. Plumbed direct, it registered 45 lbs cold at 2000 RPM. With the filter hooked up, it was right about 40 lbs at the same speed. I haven't really thought about why this would be, but I thought it was kinda interesting. Last edited by tubman; 08-29-2016 at 09:08 AM.