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Hello, I am hoping for some good advice in an area I only know a little about. I am installing a 15hp centrifigual pump, 2inch inlet; 1 1/2inch outlet. I will be installing a spring loaded relief valve in the discharge line to regulate the pressure. Should relief valve discharge into the supply...

Can someone explain why 0 and 5 weight have the same kinematic viscosity rating? I read that in the Bosch Automotive Engineering handbook.

I'm installing a dual idler gear drive and the dual idler assembly has one larger gear and one smaller gear. Does it matter how the idler assy is installed? Large gear on right or left looking from the front.

please explain the functioning of the relief valve in a typical wet sump V8 oil pump(BBC). Does increasing spring pressure only affect the max pressure at which the pump goes into relief or does it change the entire pressure "curve"?

which type of camshaft drive offers the least parasitic loss; belt, chain, or gear?

do oils formulated for diesel engines have a greater propensity to foam at higher rpm then oil formulated for gasoline engines?

while troubleshooting an engine's oiling system problem on our engine dyno. the phrase "pump cavitation" is thrown around rather loosely. can anyone simply define cavitation as it would apply to spur gear type oil pump. this is a "dry sump" oiling system in that the pump is...