Air cooled 911 filters

[SBFord]

Searched a bunch and didn't find anything.

Looking for recommendations for a filter for a 1987 Porsche 930 (911 turbo). Engine had been rebuilt and only has 2800 miles on the rebuild. Using HPL Badass Racing 10w60.

1-12 UNF threads, which greatly limits options. Maybe I could get a sandwich adapter and have a 1-12UNF to 26-1.5mm adapter bolt made.

Baldwin BT292
WIX 51283
Porsche Classic PC260
Mahle OC54
Mann W940-29

 

[JayhawkRoy]

O'Reilly has the Wix available for $17.99. I could get one by 4 pm today, or early tomorrow if I ordered it now. Your availability may vary.

 

[BrendanC]

i would check into the fleet guard or donaldson options here.

 

[Vercingetorix]

Why not just use the Porsche filter? No way I would allow a Non OEM filter on that car. Porsche(purolator?), Mahle, Mann or Hengst would be my choice.

 

[wings&wheels]

OEM preferably......but Mann & Hummel (Euro made) or Mahle are acceptable. I'd avoid any adapters or local auto parts stores wares, no logical reason for their use here.

As an FYI, a recent thread on the Mahle's for my 993.

I need a 930

Mahle, Austria vs. China COO

 

[drtyler]

The Austrian Mahle OC54 was the best for a long time. Mahle has moved this to Chinese origin. It no longer has the base end bypass as well.

Porsche filter and Mann W940/29 are identical, except for paint color.

WIX claims 95% efficiency at 20 microns, which is better than many options.

I still have a stash of Austrian Mahle OC54 that I use, but the Mann or Wix would be 2nd choice.

 

[SBFord]

The Donaldson P559418 looks to be a good fit. Roughly same stats as the Baldwin.

Porsche / Mann posts zero info about their filter other than the bypass PSI. Is it designed for 37 year old cars with 100k miles or essentially 3 year old cars with 2800 miles?

I'm always suspicious of WIX's filtration claims after the testing Ascent did on the XP but you're right, 95% at 20mu is by far the best. Baldwin claims 95% at 30 mu if you call them.

 

[drtyler]

The Donaldson P559418 looks to be a good fit. Roughly same stats as the Baldwin.

Porsche / Mann posts zero info about their filter other than the bypass PSI. Is it designed for 37 year old cars with 100k miles or essentially 3 year old cars with 2800 miles?

I'm always suspicious of WIX's filtration claims after the testing Ascent did on the XP but you're right, 95% at 20mu is by far the best. Baldwin claims 95% at 30 mu if you call them.

Per email from Mann, the W940/29 has 50% efficiency at 30 microns and 99% efficiency at 50 microns.

 

[SBFord]

WIX lists nominal filtration at 21 mu but also claims 95% at 20 mu? That doesn't make any sense to me.

The Mann filtration is a joke.

And this is why I'd explore an adapter. I have the Amsoil EAO15 on my Windsor. 99% at 20 mu. The EAO55 is the right size, has the right bypass psi, and has a large opening (wrong thread at 27x1.5mm).

 

[Bettez88]

I’d just run this