Re: PTV's 1951 Packard 200
Posted by HH56 On 2016/6/23 17:02:10
I believe that filter plumbing in the 48 memo where the pigtail is removed and oil runs thru the filter before going to the lifter gallery is for pre 51 cars with solid lifters. The filter lowers pressure enough that hydraulic lifters had issues with the oil flowing thru the filter first.
When adding a filter, many of the 48-50 327 blocks, and the 51-4 engines change to a tee fitting at the lower port where the pigtail and sender are fed. One leg off the new tee goes to the input on side of the filter and bottom output of filter drops almost straight down to a port on the side of the block where oil drops directly back into the crankcase.
Some of the tees had a restriction or orifice on the filter feed port to slow the flow and others used a restriction at the filter elbow fitting. Some filter canisters have very small holes in the center pipe to control how fast oil can exit and flow back to the crankcase. Both of those control means were to limit how much flow could flow thru the filter so the lifters didn't starve.
Here is a snip from one of Kevs photos where almost all the filter plumbing is shown.
Attach file:
(143.61 KB)
When adding a filter, many of the 48-50 327 blocks, and the 51-4 engines change to a tee fitting at the lower port where the pigtail and sender are fed. One leg off the new tee goes to the input on side of the filter and bottom output of filter drops almost straight down to a port on the side of the block where oil drops directly back into the crankcase.
Some of the tees had a restriction or orifice on the filter feed port to slow the flow and others used a restriction at the filter elbow fitting. Some filter canisters have very small holes in the center pipe to control how fast oil can exit and flow back to the crankcase. Both of those control means were to limit how much flow could flow thru the filter so the lifters didn't starve.
Here is a snip from one of Kevs photos where almost all the filter plumbing is shown.
Attach file:
(143.61 KB)
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