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Pete · 03-23-2020, 05:20 PM

Back in the 50's I had a customer bring a new rebuilt engine in that he had just done. He was complaining of only 40 lb of oil pressure with an M15 pump. I took the front cover off and he had forgotten to install the plug in the galley behind the cam gear.

I highly doubt a .020 hole is going to affect the oil preassure or volume even with a stock pump.

A much more important thing to do on a wet sump flathead is to widen and deepen the grooves in the front and center cam journals for more flow to the mains.
8ba's usually have no problems but the early cams quite often have over 50% of the groove blocked by casting flash.

03-23-2020, 05:20 PM	#32
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,408	Re: Timing gear oiling? Back in the 50's I had a customer bring a new rebuilt engine in that he had just done. He was complaining of only 40 lb of oil pressure with an M15 pump. I took the front cover off and he had forgotten to install the plug in the galley behind the cam gear. I highly doubt a .020 hole is going to affect the oil preassure or volume even with a stock pump. A much more important thing to do on a wet sump flathead is to widen and deepen the grooves in the front and center cam journals for more flow to the mains. 8ba's usually have no problems but the early cams quite often have over 50% of the groove blocked by casting flash.