- May 5, 2015
- Reaction score
- Port Angeles, Washington
Un able to open DWG file I would like to connect via EmailTerry,
While I agree that there is a certain amount of thermosyphoning of the water and therefore while running an engine the radiator does tend to heat up (model T cooling system) the introduction of a pump should assist in the cooling effort. Not having a CNC machine I machine my impellers with straight vanes but offset from the centerline to give the desired flow across the vanes. My pump body has the outlet tangential to the inside bore of the pump. I have made the impeller shaft bore two different ways, one on center with the housing bore and one with an offset center to form what has been referred to as a cutwater. I have never tested the flow rate of these pumps but even after just a few seconds of running an engine I can feel heat circulating through the radiator.
Your impeller design should work great but I agree with the other posters that you need to make your discharge port tangential to the pump bore.
Attached is the drawing for the pump on my 4 cylinder engine. This design has somewhat of a cutwater that is simpler to machine without CNC. The pump draws water from the block then pumps it to the radiator.