Hello,
I just bought my 2015 CVO RGU about 2 weeks ago and one of the first things I noticed on it was the my oil pressure ran lower than what I was seeing on my 2011 103" engine.
What caught my attention the most was sitting at an idle at a stop light after riding for 2 hours and my oil pressure was 8psi. When I checked it riding at 60-70 MPH it was 32psi.
I am not getting any noise to say the psi is to low but as I said I am just not use to seeing it this low. Is this normal for the 110" engine?
Thanks all for your help.
The pressures you noted are actually typical for Twin Cam engines. Harley considers 30 - 36 psi at normal operating temperature and 2000 plus rpm cruising speeds to be the normal range, and most seem to run in the lower half of that range until you crank up the rpm's. As for idle, there is no real spec from Harley, people tend to report anywhere from almost nothing to 15 psi. Common readings on the 2007 and later models seem to be anywhere from 5 psi to 12 psi depending on oil temperature, viscosity, and idle speed. It's not necessary to have high pressure at idle, and it can in fact be a negative since anything over about 15 psi causes the piston cooling jets to dump more oil into the sump. Good pressure at 2000 rpm and up combined with very low pressure at idle often indicates a leaking bypass valve in the cam plate btw. Your numbers don't indicate anything unusual.
Don't forget, if you want truly accurate readings you will need to use a calibrated and certified mechanics pressure gauge teed into the system at the stock sender location. Harley's gauges aren't exactly precision instruments.
Jerry