Re: Full-flow oil filter conversion for V-8

Posted by Craig Hendrickson On 2009/7/17 15:18:55

What? No comments or questions?

OK, I'll relate a couple of questions that came up at the time I was doing part 1.

1) Question: Since the original hole is for vacuum and sized at 1/8NPT (0.332in) Is there enough thickness in the #6/8 main web for a 1/2 drilled through holes and a 9/16in or 37/64in holes (0.562-0.578) for the 3/8NPT threads?

Answer: Yes. Because there is an enlarged cast boss around the original internal hole in the main web. It is not quite as large as the main web parting line at the pan rail, but certainly large enough for a 0.562-0.578in hole. I do not have a bare Packard block handy right now to measure it, but I did measure it at the time. The hole from the outside goes through solid cast iron, not near the water jacket and meets the other hole at 90deg angle inside the cast bulge.

2) Question: Why 1/2in minimum internal diameter of all fittings and hoses?

Answer: Because of my experience with Pontiac V-8 engines. The minimum internal diameter of the major oil passages in a Pontiac V-8 are 1/2in. Also, Pontiac uses 3/8NPT plugs at the back of the oil galleries that feed directly off of the main passage coming from the oil pump. High performance Pontiac V-8s have seen much more abuse over the years than Packard V-8s ever have, so what's good for Pontiac should be good enough for Packard.

Craig