Fuel filter - How many microns?
Recently someone recommended a 10 micron filter to avoid problems with clogged injectors. That makes sense, but are there down sides, such as more restrictive flow, chance of filter clogging or frequent service?
Any other bits of advice, such as best element material?
My current filter is blue (Earl's?), smallish with -6AN ends and a bronze sintered element (unknown micron size). I cleaned it and it looked fine, but now I'm wondering if I should replace it before it's difficult to access.
TIA.
Not all is as it seems...
Based on my experience in an industrial environment, there is a lot of misinformation about aftermarket filter information. The aftermarket and OE filter industry is driven by cost. If specifications are to be followed, the manufacturer should comply. If there are no specifications followed or given, buyer beware.
The short answer would be to buy a motorcycle OE filter assembly, install it on the discharge of the injector pump. These are usually a good quality pleated paper element. I would also put a strainer sock on the pickup in the cell to hold back the sediment and deteriorating cell foam. Changing the fuel filter once a year would be a conservative maintenance interval. A new filter might drop pressure 1 PSID or less across the filter. Gasoline has very low viscosity, so pressure drop with a 5-10 micron filter should be minimal.
A 35 micron size means a NOMINAL rating. It means it will capture 90-95% of particles 35 microns and above. It may pass particles as large as 80 to 100 microns. 60 micron flog is visible to the naked eye.
A 10 micron filter will capture 90-95% of particles 10 microns and above. It will pass particles as large as 35-40 microns. Filter efficiency is driven by a combination of the media material, the surface area, and the rated flow.
Fuel injection systems return excess fuel flow back to the tank, so fuel is filtered, some returned to the tank and filtered again as the fuel is used.
High end filters also carry a beta rating for efficiency (like aircraft hydraulics and fuel systems). Things are complicated by single pass and multi pass ratings.
Oil Filter - How many microns?
I hope the original poster doesn't mind this thread hijack. :-).
I'm converting to a remote oil filter to give me more room for a new header, and to get the oil filter away from the heat. I'm looking at options for mounting it.
Anyone use or recommend something like this in line filter? Any micron size recommendations for our engine oil filtering?
TIA.
Remote Oil Filter Line Size?
New question regarding remote oil filter lines:
Looks like I can fit anthing between -8 and -16. What's the recommended size? How small can I go without restricting flow?
Currently, the hose between the oil tank and pump is -10. On the scavenge side, I have -8.