OIL Pressure, How much Ya got? - Page 2 - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #11 of 527 Old 03-07-2013, 09:20 PM
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Quote:
Originally Posted by Damocles View Post
Then Pascal's Law has been repealed, and replaced by . . . willys' Law!

Do you doubt the Thermo-Bob oil pressure vs. temperature data from Wattman, also?

http://www.watt-man.com/uploads/KLROilPressure.pdf

I defer to your fluid dynamics experiments and conclusions, willys! You may indeed achieve more efficient lubricant distribution, somehow confirmed by optimum location of an oil pressure gauge . . .
Pascal's law only applies to a closed static system. In a dynamic system fluid flow, passage restrictions, direction changes, leak points, velocity changes. among other things can alter the pressure from its source to its endpoint.
Regards....justjeff

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!
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post #12 of 527 Old 03-11-2013, 07:49 PM Thread Starter
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I can't hardly beleive the dis-interest I'm seeing here.

2003 KLR650-A17, 26,916miles, Kawasaki 20W50 petroleum
69f.------Main 52psi----cam banjo [email protected]
195f.----Main 11psi----cam banjo >[email protected]
195f.----Main 3.5psi---cam banjo <[email protected]M

Doesn't anybody want MORE?
pdwestman
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post #13 of 527 Old 03-11-2013, 08:25 PM Thread Starter
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Did ya notice, that the pressure releif valve didn't even have to operate, its leaking a plenty, even on COLD 20W50.
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post #14 of 527 Old 03-11-2013, 08:25 PM
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That is very interesting pdwestman. Especially the big difference from cold to hot. I would not have suspected the hot pressure would be so low. So what are you thinking?
Regards....justjeff

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!
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post #15 of 527 Old 03-11-2013, 08:44 PM Thread Starter
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justjeff,
Refer to post #1, STOP the LEAKAGE!
Answer, Refer to post #9, Lap the releif valve seat with valve compound.

I may have been the first ever to DO IT, I don't know, but at the end of my mods.
Someone needs to do it before any other mods, maybe while cleaning the screen or when doing a water pump seal or just because they have the ability to do a before and after oil pressure test.
Which I STRONGLY suggest. TEST and RECORD, PSI at what ever temp you like, just make temp the same. I used a infra-red thermometer.
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post #16 of 527 Old 03-12-2013, 09:34 AM
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I think that the average KLRista doesn't realize the implications of what you are trying to do or change and why you are wanting to do this. I do. It's only when you start understanding why and what it is that you start to want more information. It was extremely interesting hearing all of you findings etc and your past experiences with your KLR.
Like you I want as much oil up at the head as possible and I want to have an accurate guage showing me this pressure so IF, anything changes in the head I can adjust so that I can save my head. I have only ever seen one lower end get burned up from oil issues, but many heads, cams etc.......with the amount of money we spend on modifying our engines especially the head, this information is extremely informative.
We both have been looking at the flow to the head but for different reasons. We have both done similar modifications to the oil flow characteristics as to get more oil to the head.
Like I said when people understand why and what for then they will ask for more....but until they have a personal interest....they won't.
IMHO...it's their loss.......to each their own.
I wouldn't take it personally at all........the idea is to share the knowledge but as the saying goes.....you can lead a horse to water but you can't make it drink......
I'll go back to the PM world as to not inflame the thread......with arguementive theory........

Willys
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post #17 of 527 Old 03-12-2013, 10:07 AM Thread Starter
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Quote:
Originally Posted by pdwestman View Post
I can't hardly beleive the dis-interest I'm seeing here.

2003 KLR650-A17, 26,916miles, Kawasaki 20W50 petroleum
69f.------Main 52psi----cam banjo [email protected]
195f.----Main 11psi----cam banjo >[email protected]
195f.----Main 3.5psi---cam banjo <[email protected]

Doesn't anybody want MORE?
pdwestman
I just want to give you all, the WARMING UP numbers for this bike.

168f.-----Main 6psi----cam banjo <[email protected]
168f.-----Main 10psi---cam banjo [email protected]
172f.-----Main 13psi---cam banjo [email protected]
175f.-----Main 17psi---cam banjo <[email protected]
190f.-----Main 20psi---cam banjo <[email protected]
pdwestman
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post #18 of 527 Old 03-12-2013, 08:24 PM
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Hi Guys!
I feel like I have come into the conversation in the middle. Maybe you could explain a little more about how this project started and what it is about. I know about KLR's burning up heads when the oil level gets too low but was not aware of how low the pressure to the head is during normal operation. Is this common or is that what you are trying to find out? How much did the oil pr increase after lapping the vale seat?
Regards....justjeff

It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Woooo WOOOOO!!!!!
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post #19 of 527 Old 03-13-2013, 06:16 PM Thread Starter
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justjeff,
Don't feel bad or left out of the loop. Even when we start a new thread, especially concerning OIL, we are all starting in the MIDDLE.

T748, was some help. He posted, "Oil Pressure light switch" on my birthday last year. Kinda re-lit the fire under me. He temporarily, at least connected a pressure gauge to the Main Galley. Kinda made him worry un-necessarily. Full of oil, is GOOD ENOUGH! But can it be BETTER?

I THINK IT CAN.
FIRST. Measure your existing oil pressure / pressures. RECORD your readings!
SECOND. Stop the leakage, from the pressure releif valve.
THIRD. Re-measure oil pressures, RECORD your readings.
We'll see where IT can go, from there. The pump has plenty of volume, we just need to make better USE of what we have, IMO.
pdwestman

Last edited by pdwestman; 03-13-2013 at 06:35 PM. Reason: changed and added text.
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post #20 of 527 Old 03-13-2013, 07:04 PM Thread Starter
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Quote:
Originally Posted by justjeff View Post
Hi Guys!
I feel like I have come into the conversation in the middle. How much did the oil pr increase after lapping the vale seat?
Regards....justjeff
justjeff,
I do not know how much, just lapping the releif valve seat will increase anybodys pressure. Depends on HOW MUCH the releif valve is currently leaking?
We learn from experience, our own or others.
I found the leakage after 3 other mods to my oil system. And made this and one other mod at the same time. Now helping others to avoid my error. I was IN THE MIDDLE again.
pdwestman
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