SOHC.co.uk Forums > CB350/400
400 Four Oil filter - "genuine" or "aftermarket" ?
Trigger:
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K2-K6:
The competent filter manufacturers should be able to produce filters that at minimum can't give any problems, structurally or other issues.
Cost is obviously a consideration through whichever channels they are bought, whatever their maker. But ultimately can't absolutely show technical performance just by that metric.
The question with DS choice more nuanced, which manufacturer made it ? And if we don't know that we can't have a reliable technical performance either. In addition, if that supply just buys any maker that is then sold on, are there any supporting analysis if there's a mix of these manufacturers? And how would DS know and corellate any failure with batch production identification or similar. Id doubt if there's anything in the way of report on real performance from their two lines offered, or could be wrong there.
It seems that both Honda and Hi-flo brands are well regarded and most definitely their experience is available to back up their manufacturing competency.
Unspecified brands, who knows in reality, and do you want to verify it with your own bike ?
Nurse Julie:
--- Quote from: K2-K6 on September 08, 2023, 02:39:18 PM ---
--- Quote from: Trigger on September 08, 2023, 02:14:52 PM ---
--- Quote from: Bryanj on September 08, 2023, 02:08:31 PM ---Doubtful Ken the pump pressure beats gravity by a helluva lot
--- End quote ---
How many PSI is gravity Bryan ;D ;D ;D
--- End quote ---
There is a relationship there that has an effect. If he put more volume there, above the test site, it should exercise more pressure on the membrane from increase in mass. And why waterproof stats give hydrostatic pressure figure to illustrate this, I brlieve.
I've seen it the other way round, having to pump liquid up floors in a building, arranged for pump etc but it couldn't lift the liquid at that specific gravity the required amount, as soon as the tube filled up the pump head couldn't exert enough pressure to move that column. Had to use expensive high pressure stainless steel pump heads and reduce the pipe diameter to get it lifted effectively.
Also, if you reduce pressure in a pipe then even Mercury will be pulled up as you've reduced atmospheric pressure acting on that mass from 14.7psi to lower and let effectively made the Mercury mass less, how vac tube carb sync gauges work.
And another thing, where the moon is in relation to earth, it's own gravity in opposition to earth's then causes the sea water to rise, as in the tidal movement.
I'm nowhere near good enough at physics to place maths on top of this ;D
--- End quote ---
This is basic biology and physiology surely 😂😂😂😂 For a pump to work at its optimum efficiency, the volume and viscosity of the given fluid needs to be at its 'standard' norms for it to pump correctly. If a pump is designed to do it's optimum job, as an example, with the heart and blood pressure, two factors need to be determined. The amount of blood the heart pumps (volume) and how hard it is for the blood to move through the arteries (force) . The more blood the heart pumps and the narrower the arteries, the higher the blood pressure. So by thinning the blood artificially by say Warfarin, although the volume stays the same, the less force is required to be exerted by the pump to give the same outcome.
Therefore, going back to the oil filter question, it would appear that the viscosity of the oil would be a major factor in determining the volume of oil moved as a PSI rate 😁😁😁😁😁😁
Athame57:
--- Quote from: Nurse Julie on September 08, 2023, 03:31:02 PM ---
... as an example, with the heart and blood pressure, two factors need to be determined. The amount of blood the heart pumps (volume) and how hard it is for the blood to move through the arteries (force) . The more blood the heart pumps and the narrower the arteries, the higher the blood pressure. So by thinning the blood artificially by say Warfarin, although the volume stays the same, the less force is required to be exerted by the pump to give the same outcome.
--- End quote ---
Oh Julie
Now you've got me checking my pulse and feeling dodgy!! :o ;D
Bryanj:
As i remember it you have tp put an apple on your head and get william to shoot it of, then measure the weight of the brown stuff leaking from your left trouser leg, double it, and the number you first thought of and go back to sleep after 50 hors and 3,000 km in 4 shifts
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