Excessive oil pressure, not good??

[metaliser]

This has been covered in some other thread maybe but here's my ordeal or take, I now have a zipper button on the by pressure spring, I almost peg the oil gauge most of the time, idles at the 2nd mark even when hot, two much pressure could be building in the oil pump and poss robbing power, could it not, I apparently have good ring seal because I have no oil puke whatsoever, I'm going to pull the button and install a new stock spring and see how that goes, talked it over with some members and they agree, what's your take. 
Also going to install the 3rd set of lifters, I seem to keep having a problem with 1 bleeding down after 5 or 6 thousand miles, blamned fueling's but now I remember one HD lifter going south after the pressure increase, could this be the cause, you'd think not.

[tmwmoose]

I had the same deal also with there shim with a fueling pump ran it like that for 5 years encountered no problems, I eventually filed it down some which helped lower it down some

[Clintster]

What about installing the Baisley spring?  I don't run a guage but the spring seemed to quiet it down a bit.  At the time I did the spring I took some other corrective measures, but I know it sure didn't hurt.

[RevFastEddy]

What oil are you using. ?   50w or 20w50 is what many folks use year around. It works but even by HD standards it might be too thick for your ambient temperatures. It is maybe 55d or 60d for a high here in Seattle and I switched to 10w40 like the book says. My oil temp runs 160 to 190d and I use a feuling pump and Baisley spring.

Just a thought before you pull the spring looking for lower oil pressure... besides 55 or 60# on start up is common with 20 to 30# hot at highway speeds.

[jsachs1]

The shims I make and use are .070".They work like a champ,when needed.
I think Zippers are like.200".They need to be cut down.
John

[metaliser]

What oil are you using. ?   50w or 20w50 is what many folks use year around. It works but even by HD standards it might be too thick for your ambient temperatures. It is maybe 55d or 60d for a high here in Seattle and I switched to 10w40 like the book says. My oil temp runs 160 to 190d and I use a feuling pump and Baisley spring.

Just a thought before you pull the spring looking for lower oil pressure... besides 55 or 60# on start up is common with 20 to 30# hot at highway speeds.

Eddy the lowest I've seen my pressure in the hot part of summer is about 50 or more, like a smart guy once told me what Smokey Yunik said, to much oil pressure builds uneeded friction, friction causes heat, friction also robs power, just a thought.

[RevFastEddy]

I dont disagree with you on using power. As I understand it a TC oil pump uses 3 to 4 hp at full RPM... The oil pressure can have several causes.. Is the gage accurate?? probably but who knows for sure.. or there is too much restriction to oil flow be it more oil than the passages can flow or a restriction in a passage causing high oil pressure and low delivery at the recieving end.  I can sure agree you dont need the 50# being your lowest pressure but before bypassing the oil I was suggesting some possible causes. Good luck..

[rbonner]

I'd say 30 PSI at temp would be a perfect setup...  Going to 50 cold is not a problem.  Just tweak it until it comes out where you want it.  When mine overheats the pressure dropped down to next to nothing at idle and the bike would ping pulling away from a stop. Fixed that with the CVO cooler.  Mines just a stocker 96, but I'd say the same basic rules apply. 50 + PSI of oil pressure all the time is a waste of HP but lack of oiling also means lack of cooling.  Just tweak it but be glad you have some extra..

BOB

[ViennaHog]

Hot idle pressure above 10-15 psi activates the piston jets. I do not know the precise design parameters of the oil circuit, but I tend to believe that HD set the pop off pressure for the jets to that level for a reason. Could overload the suction side of the oil pump at idle and build up a sump. Again, I am just guessing.

[RainDodger]

Personally, I don't get why everyone wants to raise their pressure as high as they do. Our engines (generally) don't require it.

[7hogs]

Mine pegs at cold and I have the feuling w/zippers springs, cold idles around 40, hot runs about 45-50 and hot idle is around 30. 40k on the motor and no issues

[Admiral Akbar]

Lifters ain't rattlin' you got enough pressure..

could this be the cause, you'd think not.

More than likely some crap got loose an stuck in the lifter valve.. Max

[metaliser]

Lifters ain't rattlin' you got enough pressure..

could this be the cause, you'd think not.

More than likely some crap got loose an stuck in the lifter valve.. Max

You could be right Max, but I'm pulling it down today, I have some new HDb's, new pushrods ans also some new cams, an 37's I'm going to try, I'll let all know the out come.

[Velocity1]

Good luck with the oil pressure adjustment.  Hope it works out.  Keep us updated with the change after the work.  As for the 37's...Haven't heard anybody say anything bad about them yet.  Great cams.  I love mine.  Power everywhere.

[hardyheadscom]

do ya have an HD oil cooler with a thermostat........ if a thermostat malfunctions it can stop flow and raise oil pressure.

seen it a few times

[metaliser]

do ya have an HD oil cooler with a thermostat........ if a thermostat malfunctions it can stop flow and raise oil pressure.

seen it a few times

Don't have a oil cooler, pulled the shim out and it measures 200 thous, that would put alot of pressure on the bypass I would think, maybe zippers offered different one's and the indy ordered the wrong one.