Factory Harley Oil Pressure Specs
Twin Cam Engine
Cold engine start-up: around 44-50 psi
Warm engine at 55 mph and up: 30 to 38 psi .
Warm engine At idle: at least 10 psi
Knuckle, Pan, Shovel & Evo Engine
Cold engine start-up: around 44 psi
Warm engine at 55 mph and up: 30 to 36 psi.
Warm engine at idle: at least 10 psi
E.R.T. Products strongly advises that you follow
the Factory Harley oil pressure specs listed here!
If your engine does not meet these factory oil pressure specs, oil pressure too low, click your engine type below for the cure!
The cure for Harley oil pressure problems
Shovelhead
Shovelhead
Shovelhead
Install instant oil pressure in your Shovelhead engine. Replace the stock Harley oil pressure relief spring. Easy installation!
Evolution
Shovelhead
Shovelhead
Precise adjustable oil pressure for Evo engines. Replaces the stock Harley oil pressure relief cap & oil pressure relief spring.
Twin Cam
Shovelhead
Twin Cam
Replace the stock Harley Twin Cam oil pressure relief spring. Works in all Harley camplates including Screaming Eagle along with aftermarket camplates.