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Author Topic: NACA 66 Special A/BGS  (Read 346096 times)
revolutionary, awelker and 1 Guest are viewing this topic.
Rex Schimmer
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« Reply #1215 on: May 20, 2019, 04:48:44 PM »

Rob,
If you only use the Pall filter for the dyno it would be worth the effort and cost over the Oberg. The Pall filter has a "beta" rating at 6 microns of 200 which means that it will catch 199 out of 200 6 micron particles that that go through it, that is 99.995% efficient. This means that it will actually clean your engine and oil tank during dyno operation. This filter was used by Nissan Racing as the dyno filter on all of their racing engines specifically to clean the engines during dyno testing. The Operg will catch rocks, birds and small children the Pall will literally clean your engine. 

Rex
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manta22
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« Reply #1216 on: May 20, 2019, 06:19:31 PM »

Wix says:

"We offer two very different and distinct racing filter lines. For maximum flow and horsepower the lowest restriction pure racing media filters are recommended – oil (T-10) and air (T-66). However, when endurance and better engine protection are needed, WIX’s high efficiency endurance media filters are the correct choice – oil (T-71) and air (T-88). "

http://wixfilters.com/Speciality/6-17-13%20wix%20racing%20catalog2.pdf

I don't know what the micron rating is of their AP and EE filter types but they recommend their AP filter for maximum flow while the EE filter element is intended for endurance applications. I assume that "endurance" filters have a finer micron filter rating.

Putting a filter between the dry-sump pan is a good idea but you need only a very low- restriction screen to keep big pieces out of the dry sump pump. Between its outlet and the oil tankshouldn'tn't need a very fine filter; the engine oil pump outlet needs a good filter but one that is way too fine may have higher pressure drop, especially as it becomes loaded with debris.

If I remember right, Ford made that mistake on one of their Indy cars back in the '60s or '70s- they used a small oil filter with a very fine micron rating and during the race it packed up and cut off the engine oil supply.

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
John Burk
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« Reply #1217 on: May 20, 2019, 08:34:59 PM »

Pall (Paul) oil filters also have very low pressure drop so normally nothing bypasses . The codes are available on line . When you understand the numbers you can get screw on filters and heads fairly cheap on ebay .
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Rex Schimmer
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« Reply #1218 on: May 21, 2019, 10:57:03 AM »

A comment on the Wix filters: Their filter media is organic fiber, i.e. paper held together with added resin. Paper fibers have a set diameter and density so how do you get a finer paper element? you compress it so that the channels between the fibers get smaller and then you glue them in place with the addition of resin. All of this just makes the pressure drop across the filter media increase and reduce its contamination holding ability. This, like screen filters, is 1940s filter technology. As John said, the Pall filter for a given micron rating will have substantially lower pressure drop than a paper filter of the same rating. I have personally applied Pall filtration in a large number of industrial application with flow rates exceeding 500 gpm and pressures exceeding 7500 psi and the Pall filtration always performed as we required which is why I am so positive on the Pall product. Automotive filters are mostly paper media and that is because it is cheap and does an acceptable job for the every day drive to the store car engine. I don't consider an engine that is going to power a car to over 500 mph as being in this same classification. If you are going to invest 20-30 K dollars in a race engine then why save money on the filter? Oil is the life blood of a race engine, clean oil gives the engine maximum life.

Rex
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« Reply #1219 on: May 21, 2019, 11:37:32 AM »

Rex & John;

I did not know that Pall made automotive oil filters!  Good grief, I've used them in industrial application- the type made of wound textile fibers- but that's all. Does Pall make a spin-on oil filter for a SBC?

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
John Burk
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« Reply #1220 on: May 21, 2019, 01:33:53 PM »

Pall makes industrial oil filters but they work fine for engine oil . Pall filters are crisscrossed layers of fine glass strands that are heated till the strands fuse together to maintain the gaps . Thanks Rex for telling us about them .
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