twybrow
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| posted on 29/8/08 at 12:50 PM |
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Drilling and tapping a banjo bolt?
I have a Koso gauge for my Locost, and was wondering how I can best go about reading the oil temperature. I was going to leave it for now, but last
night I had a eureka moment - why not drill/tap the top of the oil cooler banjo bolt (M14)? Can anyone foresee an issue with drilling/tapping to
accept the 1/8 npt sensor?
[Edited on 29/8/08 by twybrow]
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clairetoo
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| posted on 29/8/08 at 03:03 PM |
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Only that you will be reading the oil temp at the cooler , not at the engine (where it will be hotter )
Its cuz I is blond , innit
Claire xx
Will weld for food......
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britishtrident
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| posted on 29/8/08 at 04:51 PM |
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The end of banjo won't usually have enough thickness to allow tapping.
The correct place to measure oil temperature is anywhere in the flow from the cooler to the bearings.
Although the sump temperature could be handy to know it is really the temperature of the oil going to the bearings you need to know so you can
adjust (ie tape over) the airflow to the oil cooler. Oil temp below 80c is not good news, ideally should be a bit hotter (say 10 to15 degrees)
than the water temp.
[Edited on 29/8/08 by britishtrident]
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Paul TigerB6
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| posted on 29/8/08 at 06:34 PM |
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Does the following help you at all??
linky
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twybrow
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| posted on 31/8/08 at 04:12 PM |
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Some interesting points...
- If you are measuring elsewhere in the system, then surely you get to know what hot and cold look like on the gauge?
- The thicknss of the banjo could presumably be beefed up by welding a nut or similar to the bolt, then drilling/tapping that?
- I am not too worried about running too cold, I suspect it will run too hot if anything, as I am using the bike oil cooler, and it wont be in as much
of an airflow as the bike
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britishtrident
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| posted on 1/9/08 at 02:12 PM |
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Its the temperature going in to the bearings (ie cooler exit or temperature in the main oil gallery) you have to control not the temperature coming
back.
The only value of knowing the temperature coming back from the bearings (ie sump temperature) is it will tell you if you have a tight bearing.
If you can mount the cooler in its own airflow if it is mounted in front of the water rad it will get enough airflow.
In the UK climate 95% of the time part of an oil cooler on a racer will have to be taped over to get the oil hot enough. If the oil temp going to the
bearings is in the range 80 to about 110c all is well.
Below 80 and you get nasty acids condensing in the sump.
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