Extra fuel filter ideas?

[roti102]

Anyone ever heard or did an extra fuel filter on their diesel engine? Ive been looking into it and thinking that it would put more strain on the fuel pump. Lets hear some ideas on this topic?

[venum]

done already, and documented in Diesel Boyz Maintenance thread

but that thread has since been lost

essentially we installed plastic carburetor filters inline with the bigger fuel filter on direct injection diesel engines

amazing how much crap was still filtered

I won't attempt on a common rail engine though

[roti102]

Hmmmm interesting. What micron rating would that be? I'm looking to get a filter of about 5 micron rated.

[323_wagon_dude]

I had it with my common rail... never had an issue.

It goes before the stock fuel filter to protect that filter from getting the gunk.

Stuck knows the exact micron sizes.... but i remember him saying as the filters were designed for gasoline, it had a smaller micron size than diesel and offered better protection.

Its been years so I might have remembered wrong...

[lighthammer]

^^ can work with direct injections, not advisable with common rail due to the higher fuel pressures used (you'll need a high-pressure rated filter/housing).

[black start]

I've seen in a friend's d21 pickup (td27 powered) that he has two diesel filters in line. Setup seems to be oem as well. Is this common or was that an add-in? Also, how effective is it to put two diesel filters in line like that? I may wish two try this in my b13 if the reviews lean in the positive direction with no harmful effects on the engine.

My application would be a Nissan cd20 engine.

[Big Z]

Dual filtration..... You need to determine objective behind running dual filters.
I can see the following:

1. Better filtration
2. Cheaper running cost
3. Ease of access


For better filtration, the micron rating on the filter closer to the engine needs to have a smaller micron rating i.e. it needs to remove smaller particles than the first filter.
Daisy chaining identical filters will usually not improve the filtration efficiency. An extreme example is... can you use a fishing net to catch a mosquito? Will two fishing nets 1 metre apart catch the said mosquito?

Does the overall cost of the additional filter cost less than the original filter? Then this config will save you a few dollars, assuming that the lifetime per dollar ratio is higher to the original.


Be careful of which filter you use. Some of the newer diesel vehicles, such as the 2005 up Hilux have in tank electrical fuel pumps, so a low pressure filter will not be advisable.

[lighthammer]

I've seen in a friend's d21 pickup (td27 powered) that he has two diesel filters in line. Setup seems to be oem as well. Is this common or was that an add-in? Also, how effective is it to put two diesel filters in line like that? I may wish two try this in my b13 if the reviews lean in the positive direction with no harmful effects on the engine.

My application would be a Nissan cd20 engine.

The the yd25 and QD32 both come with dual filters, i think the TD27does as well. The ZD30 comes with only one fuel filter/sedimentor.

[black start]

Is the micron rating printed on the filters or somewhere else. And if so where is it?

Also, anyone use Sakura brand filters and have any reviews?

[Big Z]

Unfortunately, that information is not readily available in most cases.

[roti102]

I've read that filter micron rating is tested by the ability of the filter to catch 50% of a spicific size of particles. Example : a filter that catches 50% of 5 micron particles is rated at 5 microns.

[roti102]

I've read that filter micron rating is tested by the ability of the filter to catch 50% of a spicific size of particles. Example : a filter that catches 50% of 5 micron particles is rated at 5 microns.

[black start]

^any credible link to support your statement or is it just hear say?I asking not to fight down but to learn more of the topic.

[Big Z]

http://www.dieselplace.com/forum/showth ... p?t=303109

Micron Ratings What You Should Know & Ask


I would like to clarify some points regarding Microns and Micron ratings for the non engineers, scientists and Tribologists among us (most of us).

Micron ratings are how oil, fuel, hydraulic and other liquid filters efficiency are measured. What is a Micron? It’s the size measurement given to microscopic particles. A human hair for instance is 40-80 microns wide.

When talking about Micron ratings there are two different ratings commonly referred to or given to a filter.

The Nominal Rating which is basically this. The smallest size particle the filter will catch 50% of the time on a consistent basis. The Nominal rating is just a way to get a lower number in the marketing and really doesn’t mean anything to you and I where our trucks are concerned. For instance the Baldwin B7039 is a direct replacement for the Motorcraft FL1995 oil filter. Baldwin’s B7039 has a Nominal rating of 12 microns. That means that 12 Microns is the smallest particle it will catch 50% of the time. Who cares about 50% of the time?

The next and most important rating is the Absolute Rating. The absolute rating is this. The smallest particle the filter will catch 98.7% of the time. This is the rating you should be asking for when you are researching your filters. For instance the Baldwin B7039 has an Absolute Rating of 25 Microns. The smallest particle it will catch 98.7% of the time is 25 microns.

However my explanation of the Absolute Ratings needs to be broken down a little more. Let us talk about Beta ratios and how they work as they are critical to really knowing how the filter can actually perform and are not as easily manipulated as a Nominal or Absolute number can be the unknowing consumer.

“Nominal” ratings are ok when nothing else is known; as some info is always better than no info. And “nominal” ratings can help compare one filter to another, but only at 50% efficiency.

There is a much better way to compare filters, though. Beta ratios are a multi-level rating of the efficiency of a filter. Some filters can be very good at one particle size, but poor at another. Beta ratings allow us to understand how a filter performs overall. While it is not an exact correlation, it can be presumed to reasonably represent both the “nominal” and near-absolute ratings. I say “near” because it is not set in stone where the rating is done. But the general concept is that the Beta rating gives a wider range of efficiency visualization. A very common Beta rating is “2 / 20 = x / y”

Beta ratings are read in a particular way, and some basic math must be applied. Betas are stated as two fractions, each representing a ratio. Please understand that it is NOT the actual fraction you are using, but rather the numbers as individual values. They are merely stated as a “fraction” for the purpose of easy short-hand notation.

You must take the first number (upper number) as an inverse to the number “1” (one), and then subtract that resultant percentage from a whole of 100%. This applies for the upper and lower numbers individually. Then you use the second fractional value as individual number to know what micro size the rating is stated at. Here’s an example.

Beta rating of: “2 / 20 = 13 / 23”

The “2” is taken as a percentage, when divided into “1”; i.e. 1 / 2 (one-half), or 50% missed. So 100% particles minus 50% missed = 50% caught.

The “20” is taken as a percentage, when also divided into “1”; 1/20 (one-twentieth) or 5%. So 100% particles minus 5% missed = 95% caught.

The “13” is the particle size at the 50% rating. In other words, 50% of the time the filter catches particles that are at, or larger than, 13 microns in size.

The “23” is the particle size at the 95% rating. In other words, 95% of the time the filter catches particles that are at, or larger than, 23 microns in size.

Using this formula allows you to understand how a filter does its job with both large and small particles, and how efficient it is at those particular ratings. It is a much better view of the filter’s abilities as a whole.

If you can find out the Beta Ratio on your filter I suggest you do so. If you can’t get the Beta Ratio on your filter the Absolute rating for your filter will be the next best thing to find out. Brand shouldn’t play a role in your decisions for a filter Beta Ration or Absolute Micron rating should. If you care about your truck and want to make it last for a long time use the best Beta Ratio (if available) or Absolute Rating filters you can buy regardless of cost. It’s the best thing for your investment in a Diesel truck. If you want to improve on what is available to you, install a bypass or Dual bypass filtration system. It is said by oil industry experts and Tribologists that if you can filter to and below 5 microns you will virtually eliminate the wear particles that cause damage to the internals of our engines. From that point you will wear out the additive package in the oil and not the oil itself or your engine.

Thank you to my sources for this writing:

Dave Newton (dnewton)
The Baldwin Filter Company
Amsoil Corporation


Thank You for taking the time to read this,

Dane

[roti102]

I stand corrected but this is a lot easier.

Micron Ratings


A micron is one millionth of a meter (0.00003937 inches). By contrast, a human hair is about 100 microns in diameter.



It's important to understand what kind of micron rating you're using when selecting a filter bag. For historical reasons most filter material is assigned a micron rating based on approximately 80% efficiency. Filters that remove 80% of all particles larger than 50 microns in a single pass are rated 50 microns.



Filter bags made out of monofilament mesh or micro-fiber are given absolute ratings. A filter bag with an absolute rating will capture 99% of its rated particles in a single pass.



Filters are sometimes measured in U.S. Wire Mesh instead of microns. Wire mesh measures the number of wires (or threads) per linear inch, not the size of the holes between them. As the number of wires per inch goes up, the size of the holes (in microns) goes down. There is no simple formula to convert between microns and wire mesh because it would have to account for changing wire diameter.

[supernedd]

Anyone ever heard or did an extra fuel filter on their diesel engine? Ive been looking into it and thinking that it would put more strain on the fuel pump. Lets hear some ideas on this topic?

well boi 6yrs later n i now trying this.. i install a inline filter after d original.. as a backup for my mazda bt50 n took out d strainer in d pump.. less restrictions. my theory is let the original filter/water separator do it's job n u could pump d primer n keep it pressurized. that way .. less work for the pump. n it small . so less area for fuel to pass

[Ted_v2]

the best bet is go with equipment filters like caterpillar ect, they have like 5 10 micron filters, extended life ect. buy the metal base and the filters online.

[supernedd]

the best bet is go with equipment filters like caterpillar ect, they have like 5 10 micron filters, extended life ect. buy the metal base and the filters online.

yes that is what i did ..a aeromotive brand . i sent a pic in your other reply post