The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Justin B. on September 15, 2010, 08:43:45 PM
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I finally had time to hook up the oil pressure gauge this week. I machined a "manifold" that screws into the block and has provisions for attaching the oil pressure switch and the fitting for the gauge's pressure line.
I then fabricated a little panel for the meter to attach to. I ran the nylon line from the engine to the gauge inside some 1/4" polyurethane line to keep it from kinking and chafing. Time will tell whether this will be durable enough and I may very well wind up at work some morning with oil all over me!
After hooking everything up I found I had around 75 psi at idle and around 4k I had 115 psi. Of course, this was with cold oil but found I could "blip" the throttle and have the needle approach the 150 psi mark!!
I will ride this around until I can verify my oil light issue and then decide whether or not to leave it in place...
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That's pretty much what I've posted here a few times, 'Oak' Okleshen has said on a real cold day, that 165 psi oil pressure was possible !!!!
Pretty much explains the crushed oil filters .
What was the air temp then, around 75 F. ?
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If this were to be a permanent install, would you use steel line, rather than the nylon?
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Bob, these pictures were from this evening and probably 85 - 90 in the garage...
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Bob, these pictures were from this evening and probably 85 - 90 in the garage...
You probably won't see 75 until January, at least, eh Justin? ;)
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Rob, in automotive applications I use copper tubing but since we have constant flexing in the steering head/neck area I don't know whether a solid line would live very long. I may look into a steel-braided line...
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A couple weeks ago it actually got down to 59 degrees one morning! I damn near froze to death riding to work! But the next week we were paying for it...
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What weight oil is in the bike ?
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Castrol GTX 20w50... Once the new rings are broken in I'll probably switch it to Mobil 1 15w50...
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So I guess when I leave the bike outside at work during the brief 'winter' we have here in Phoenix, I really need to keep the throttle usage to a minimum until the oil gets to 80-90 F.
Especially when I'm using 20w50 semi-synthetic oil all year long .
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Same here. I took it out for a freeway blast today and found then when fully warmed up I had 80 - 85 psi at about 85 mph. Dropping backk down to 60 mph resulted in a reading that jittered around 65 psi - but no oil-light. The needle reminded me of how a speedo reads out when the cable is on it's last legs. I think I'm going to take a look at the filter... I did a top-end job on this last winter and maybe crud has built up on the filter...
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If this were to be a permanent install, would you use steel line, rather than the nylon?
I would use the stainless goodridge line as on the front brakes.
Lou
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Yeah, probably will order something like this kit:
http://www.summitracing.com/parts/SUM-G2960/?rtype=10
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Any particular reason you didn't go with an electrical system, instead of a direct reading indicator ?
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The electrical oil pressure senders are usually quite bulky so probably would have had to remote mount it, run plumbing, etc... I figured the mechanical gauge would be simpler in the long run... If I had a box full of braided line, AN fittings, etc, I might have done an electrical setup.
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Yeah, probably will order something like this kit:
http://www.summitracing.com/parts/SUM-G2960/?rtype=10
Much better idea, Justin. I saw an FAA inspector ground an Experimental Category aircraft because the builder had used nylon tubing from the engine to the OP gauge in the instrument panel. In an aircraft, that's just asking for trouble.
Whatcha think, Bob Roller?
Monte
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From what little experience I have on general aviation aircraft, aluminum tubing was usually used as the supply lines for direct reading indicators .
Aluminum tubing is generally good to about 8-900 psi .
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But, it doesn't take constant bending very well...
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Not very well at all !!!!!!!!
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Yep - Hi start oil pressure is why I can't use a Lockhart Oil cooler: Splits it open. >:(
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I've had an OEM BMW cooler on the '81 since November '97, no problems yet .
But the rubber hoses are something that gets me a bit concerned due to the constant exposure to the desert environment the bike operates in, now adding the possibility of oil pressure in the 160-170 psi range in cold weather .
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Bob, these pictures were from this evening and probably 85 - 90 in the garage...
Note the temperature readout on the Vapor... 91 degrees. Another niffty feature of the digi unit.
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Note the temperature readout on the Vapor... 91 degrees. Another niffty feature of the digi unit.
While this may not apply to all units that have liquid crystal displays, but from my experience here in Phoenix, it's quite common to have the display 'wash out' in temps above 105 F (41C.).
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Note the temperature readout on the Vapor... 91 degrees. Another niffty feature of the digi unit.
While this may not apply to all units that have liquid crystal displays, but from my experience here in Phoenix, it's quite common to have the display 'wash out' in temps above 105 F (41C.).
I spent all of one (uno) dollar (? pesos) at the local $0.99 Store for a foam backed, aluminized auto sun shade. Made up a paper pattern and then cut out a "cozy" for my digital Vapor. At work, while parked in the direct sun, The Koozie keeps my Vapor quite tidy. The son shade lives in the under-seat tray during normal ops. There's enough material to make one for Justin.
The LCD clock in my 1986 cabriolet has been less than fortunate... it's totally blacked out. Must now depend on my wristwatch fo ran accurate time hack.
Monte
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When I was in field service I used to have to let my Fluke "cool" down before I could read it after it had been in the back of the truck all day...
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I always liked their unofficial motto: If it works, it's a Fluke!
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They are good meters, though. I still have two of them of which one is the model 73 I bought in the early 80s. Seems I remember paying about $130 for it which I thought was a ridiculous sum to plop down for a VOM...
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I've had an OEM BMW cooler on the '81 since November '97, no problems yet .
But the rubber hoses are something that gets me a bit concerned due to the constant exposure to the desert environment the bike operates in, now adding the possibility of oil pressure in the 160-170 psi range in cold weather .
What model did the BMW cooler come off of Bob?
I bought a BMW cooler off eBay but it is too large. I need to know what to look for. Do you have a picture of the cooler on the bike?
Thanks in advance.
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I bought an OEM BMW kit from San Jose BMW in October 1997, while I was passing through there on vacation .
Here's a picture from the Motobins website of the cooler, or heat exchanger that I have on the '81 R65 .
http://www.motobins.co.uk/bmw-parts.php?model=R Series 2 valve Twin
At this time, I can't link to the Motobins picture, the Motobins part number is 02904 , just put the part number into their search box, and it should come up .
Here's a link to the RealOEM site, this is pretty much what you need to install an oil cooler, minus the thermostatic bypass valve, that won't fit the R65 due to clearance issues with the right exhaust header pipe .
http://www.realoem.com/bmw/showparts.do?model=0487&mospid=51635&btnr=11_1831&hg=11&fg=35
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Thanks Bob. Looks like I need to save my pennies!
Bookmarked!