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Old 05-13-2022, 12:33 PM
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Originally Posted by Rookie
Damn, you have the 1-1/2" thread? I guess all of the cross reference places are wrong. I believe we ran those in the race boat. It was a pain finding filters for the non-standard BBC filter head. I believe we ran a Fram filter. I'll see if there are some still laying around.
Yes I have aftermarket 1 1/2"-12 threads on my housing. The charts are wrong, its like banging your head against a wall. The Donaldson I found was for a Big Cummings engine but looked like it would work. I can get that with my Amsoil Account.
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Old 05-13-2022, 01:33 PM
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Ive seen some Baldwin filters go down to 9.8 micron...
Just wondering why you want to go so small?
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Old 05-13-2022, 03:55 PM
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Originally Posted by SABER28
performance engineering did my motors and said not to use the racing filters as they were meant to be changed say after every race in a car car. ive tried both and never noticed any pressure changes so why not go with the better filtration?

now i'm really confused.......
Go with what your builder said

Everyone has opinions, mine is, I like better filtration but with a high volume oil pump its moving a lot of oil. Reducing the particle size may reduce flow (don't know). Going smaller may need to use 2 filters in parallel to keep the flow up
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Old 05-13-2022, 08:46 PM
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Originally Posted by Wally
Ive seen some Baldwin filters go down to 9.8 micron...
Just wondering why you want to go so small?
20 micron seems to be the standard, Wix racing is 60 micron.
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Old 05-22-2022, 10:02 AM
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After doing a bunch of research the Fram HP6A seems to be the best filter for the bigger 1.5"-12 filter threads. 20 micron rating, 20 psi relief valve with a screen, thicker metal. The standard filter by Fram is low quality cardboard, however this one seems to be built he best.
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Old 05-23-2022, 07:28 AM
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I use the Donaldson P550832 from Amsoil. It has the flow of the racing filters and super fine filtration, the best of both worlds.
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Old 05-23-2022, 07:33 AM
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Originally Posted by ThisIsLivin
I use the Donaldson P550832 from Amsoil. It has the flow of the racing filters and super fine filtration, the best of both worlds.
That has the standard chevy thread size, no ?
https://shop.donaldson.com/store/en-.../P550832/20534
OP has something totally different.
Last edited by SB; 05-23-2022 at 07:35 AM.
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Old 05-23-2022, 08:29 AM
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Originally Posted by ThisIsLivin
I use the Donaldson P550832 from Amsoil. It has the flow of the racing filters and super fine filtration, the best of both worlds.
I used to use that one, I now have a 1.5"-12 stud. Completely different filter. Been looking for a cross reference to Donaldson or Amsoil with no luck. The Fram HP6a seems to be the best.
Last edited by jeffswav; 05-23-2022 at 08:31 AM.
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Old 05-23-2022, 08:33 AM
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Originally Posted by SB
That has the standard chevy thread size, no ?
https://shop.donaldson.com/store/en-.../P550832/20534
OP has something totally different.
Yep, wrong stud size. I still have one sitting on the shelf.
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Old 05-23-2022, 09:33 AM
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Saw another post on FB that compared micron rating, flow rate and pressure from an episode of Engine Masters where they tested a bunch of them. I used to run the Wix Racing 51222R and switched to the K&N HP-5001.

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