Oil Pressure ?
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,524
Likes: 6,406
From: Honah Lee
Your idle oil pressure is determined by idle rpm, filter, oil pump and correct oil.
You have oil jets that cool bottom side of piston. They have reliefs in them that opening above 15 or so. That way, at a red light, oil in the short term is not overheated.
When you pull out, they open and cool and blowing air cools.
The high is the relief spring valve opening in the cam plate and bleeding off oil. The 35 or so is pleanty of pressure to get oil all over ever part of engine without pushing past seals or into primary.
You have oil jets that cool bottom side of piston. They have reliefs in them that opening above 15 or so. That way, at a red light, oil in the short term is not overheated.
When you pull out, they open and cool and blowing air cools.
The high is the relief spring valve opening in the cam plate and bleeding off oil. The 35 or so is pleanty of pressure to get oil all over ever part of engine without pushing past seals or into primary.
Road Master
Joined: Jan 2015
Posts: 1,189
Likes: 805
From: Washington
My 2014 FLHTk is just like his, concering oil,pressure readings.
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Tourer
Joined: Nov 2012
Posts: 421
Likes: 71
From: Hayward Ca
Here is a good video explaining why oil pressures vary so much and the damage low oil pressure can cause.
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Road Captain
Joined: May 2014
Posts: 673
Likes: 252
From: Alberta
I try to take it easy when engine is cool and oil pressure is high. I wait till I am in the 30's before I push it past 3,000 RPM.
Lugging the motor is (at least in my opinion) a bad thing to do; hard on the machinery and probably does get enough oil flow onto the critical high pressure high temp. contact parts. There are also other reasons to not lug it.
Lugging the motor is (at least in my opinion) a bad thing to do; hard on the machinery and probably does get enough oil flow onto the critical high pressure high temp. contact parts. There are also other reasons to not lug it.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
It's also worth pointing out that our engines rely on a high flow-rate, not high pressure. 'Twas ever thus, with the big twins of all generations being made up of mostly ball and roller bearings!