The Ford Barn

Terry Burtz, Calif · 02-24-2022, 10:29 PM

The "Builders Guide" found at www.modelaengine.com has been updated.

The latest revision is dated 23 February 2022. Please use the latest guide when building an engine.

Facebook group https://www.facebook.com/groups/1123377268114692 has a lot of information, videos, and hints from people building engines. There are a lot of videos showing deburring, dial indicator readings, and checking balance.

I have the design and working model of a modulating oil pressure relief valve. It has a slow leak through the clearance between the piston and housing and when the set pressure is reached, the leakage is through 3 orifices. As pumped volume increases, the orifices open larger to maintain the set pressure. The working model has been tested to 100 PSI and at 2500 RPM oil pump shaft speed which is equivalent to 5000 crankshaft RPM and it was able to maintain the set pressure. The working model was machined on a lathe and Bridgeport mill. Next week, I will talk to a CNC shop about production. This will be a huge improvement over the brass valves with a ball and spring that are either closed or open.

02-24-2022, 10:29 PM	#11
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 319	Re: The Terry Burtz 5 main bearing engine blocks are back on track. The "Builders Guide" found at www.modelaengine.com has been updated. The latest revision is dated 23 February 2022. Please use the latest guide when building an engine. Facebook group https://www.facebook.com/groups/1123377268114692 has a lot of information, videos, and hints from people building engines. There are a lot of videos showing deburring, dial indicator readings, and checking balance. I have the design and working model of a modulating oil pressure relief valve. It has a slow leak through the clearance between the piston and housing and when the set pressure is reached, the leakage is through 3 orifices. As pumped volume increases, the orifices open larger to maintain the set pressure. The working model has been tested to 100 PSI and at 2500 RPM oil pump shaft speed which is equivalent to 5000 crankshaft RPM and it was able to maintain the set pressure. The working model was machined on a lathe and Bridgeport mill. Next week, I will talk to a CNC shop about production. This will be a huge improvement over the brass valves with a ball and spring that are either closed or open.