SE pump is more than stock of that year but about the same as the years that came stock with hydraulic tensioner's. But I'm wondering how my old chain is going to wear on them. I have dual cooling mods and change oil often so I'll see.

 

wscott.....you make a good point but you may want to consider using a period once in a while!

 

You're a gluten for punishment...Put a smiley face sticker over the freaking bezel..

 

i think the stock HD oil pressure gauge is rigged (probably made by the same company that makes the air temp gauge).

it NEVER gets to 40psi even in the dead of winter. i think it is made with high and low stops. it's not logical that EVERY harley registers that same range of PSI.

no matter the variable (ambient temp, weight of oil, temp of oil, etc) the range is always between 8 and 32 psi on the stock gauge.

 

It's the 35 lb pressure relief in the cam plate. When you hear othesr talking high pressures, they have modified the relief spring. The 8 -12 idle is designed that way into rpm, size of pump and orifices so the oil injectors do not work at idle. Unless air is forced across fins at speed, Harley does not want to cook oil at idle. The motor can take heat better then the oil at short term idle that these bikes see.

 

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LOL!

Got me !

But i thought this website is a place we are safe from " Grammar Police " !/LOL!!

Scott

 

All in good fun sir!

 

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No disrespect intended but what your saying is not always the case & heres why i say that with 2 real world example to back that up.

My bike stock 09 flhtcu w-96" motor with no mod to oil pump or spring ,used to have oil pressure in summer heat of 8psi @ idle & 32-35ish at cruise like you said.

Then post installing 2 cooling mods (UC oil cooler w-cooling fans & Wards cooling fans.) that lowered oil temp 50 deg f in summer heat & oil pressure is now a solid 18psi @ cruise & 45-47 @ cruise in 90+ deg summer WITH THE ONLY CHANGE BEING I ADDRESSED THE HEAT ISSUE THAT LOWERED OIL & ENGINE TEMP TO MORE REASONABLE LVL IN SUMMER HEAT.

Friend has a 2010 flhtcu bone stock w-96" motor & no oil mods too ,he installed an UC oil cooler w-cooling fans but didnt install Wards cool fans at the same time like i did so his bikes has bit less cooling going on.

Before he installed the UC cooler his bike in summer heat had 7-8ish psi oil pressure @ idle & max 32 psi @ cruise lie you said.

After he installed the UC oil cooler with cooling fans that considerably reduced his bikes oil /engine temp oil pressure in summer on his bike increased to 15-16psi @ idle & 43-45psi @ cruise.

With again,NOTHING OTHER THEN COOLING THE OIL is what sig increased oil pressure in summer heat on both our bikes.

Now thats real world results i saw right in front of my eyes vs what is being said here about max of 32psi with stock setup due to pressure relief spring rating of 32 psi which is not the case on our bikes with totally stock oil pumps & relief springs that also have stock hd oil pressure gauges & sending units in the motor too.

And the reason all you guys are seeing only 7-8psi @ idle & 32max @ cruise in summer heat is because you have not addressed the heat issue your hd's have and the low oil pressure reading your seeing isn't because of an issue with hd's stock oil pressure gauge & sending unit or the oil pressure relief spring in stock pump too which i have proven in real world cond that noe of you have done.

All you guys are totally ignoring whats been posted time after in front of your faces as what the root cause is for the avg hd's lower oil pressure in summer heat which is even though you think the motors & oil are just fine as they are dont suffer from heat in summer cond because you ride all day long in 100 deg heat without any mech isse etc you couldnt be further from the case esp when you have never tried cooling your motor with things that work like UC oil cooler with cooling fans & wards fans both that same time.

Thats the benefit and improvement i now enjoy in overall rider comfort & extending the srv'c life of the motor a bit in the process too that i now experience mile after mile yr after yr riding my HD's that unfortunately many
of you will never experience because you know better that it doesn't work because " YOU HAVE NEVER TREID IT! (Now that makes sense doesn't it./LOL!) .

Guys i dont keep posting this to be a PIA ,bust chops etc,i keep doing this because it made such big positive improvement in my bikes overall perf & rider comfort in summer that was just great post installing the 2 cooling mods that i want my fellow HD riders that are not happy with low oil pressure and heat their bikes are experiencing a way to improve that situation a lot that comes along 4-5 additional benefits too just like my friend & myself got on our bikes & thats it.

I know not everyone has all the same issues on their hds in summer heat but there are at least 3-4 if not 5 things the avg hd motor experiences in summer that is addressed/improved a lot post cooling them.

In my bikes case in summer heat motor oil was cooled 50 deg f,oil pressure was inc 10-12+ psi,valves/lifters were quieter,the motor now retains all pwr/trq & crisp throttle response it used to always loose in summer heat,
motor stopped detonating on hd's rec 91octane fuel for the 96" motor & more.

Anyone thats owns an air cooled HD that has enough wrenching & building motors should be experiencing most of the issues i stated above on their bikes in summer its sad that it seems most are either closed minded or not willing to listen to anyone else when is they did & installed the same 2 cooling mods could be riding a bike that would preform & ride like a totally diff bike in summer heat mile after mile yr after yr.

Thats what it's all about with me trying to get across the fact the 2 cooling mods i rec installing @ the same time being a way to significantly improve riding comfort & performance on your HD's thats many say isnt needed or isn't beneficial because " THEY HAVE NEVER TRIED IT " which makes no sense at all.

I CHALLENGE ANYONE TO INSTALL THE COOLING MODS I REC ON THEIR AIR COOLED HD & REPORT BACK THEY DID NOT GET A SIG INCREASE IN OIL PRESSURE IN SUMMER HEAT VS GOING INTO THE MOTOR TO INSTALL A NEW HI PERF OIL PUMP OR PERF OIL PRESSURE RELIEF SPRING NEITHER OF WHICH IS NEEDED TO IMPROVE/INCREASE OIL PRESSURE IN SUMMER HEAT WHEN YOU :

" ADDRESS THE ROOT CAUSE BEING EXCESSIVE HEAT GENERATED BY AIR COOLED HD'S IN SUMMER HEAT " .

And for newer bikes with a cat i rec 1st gutting cat and at very least installing Nightrider Vieds to richen up fuel calibration a tad either before or at same time someone is installing the 2 cooling mods i rec for max improvement on the avg air cooled HD's heat issues they all have which will result in multiple improvements in engine perf & rider comfort right off the bat when riding in summer heat cond.

Happy motoring.

Scott

 

Just stating what the service manual says..The oil injectors work from 12-18lb Lot of variations. Sure, hot temperatures make the oil thinner. 10-40 looks like water coming out of my air cooled rider. Different oils and temperature should not affect the top end 35 psi relief other then being lower if it does not come into play.
The bottom normal idle 4-12lbs can be greatly affected by oil and temperature sine it has no regulator. When cold, it can be much higher and then open the oil jet coolers and speed up warming the oil and motor at stop lights. Thus producing less pollution into the exhaust

 

Novels