Using an FL-500S on a Modular V8

[Falcon_LS]

Reason I'm asking is, I cut open both filters and the FL-500S doesn't have as many uneven gaps between the pleats. If I can get away with it, I'm tempted to use the FL-500S.

I've been doing quite a bit of reading around, and it seems the FL-500S is rated at 9-15 PSI and the FL-820S at 12 PSI. Other than it being slightly taller with a different PSID, would that really make a difference?

 

[ZeeOSix]

The bypass valve in the FL500S isn't that far off from the FL820S. Besides, the bypass valve setting has more to do with the filter than the vehicle it goes on. Since the FL500S is a few PSI lower, it probably means it flows a little better (less delta-p under the same conditions) than the FL820S.

 

[Chris142]

Same threads?

 

[Canadastang]

Originally Posted By: Chris142
Same threads?


Same threads.

The only difference seems to be bypass PSI, filter dimensions and flow rate. Apparently the 820 flows a little bit better.

The holes in all the torn 820's probably help with flow rate too lol.

 

[Branson304]

If you take a vehicle requiring the 820S size to a quick lube, they'll put a 500S size filter on it. The 500S works just fine in place of the 820S.

 

[HemiHawk]

I looked into this before and the bypass pressure its either half, or double of the 820s. To me thats enough of a difference to only use what the car was spec'd for.

 

[ZeeOSix]

Originally Posted By: Canadastang

The only difference seems to be bypass PSI, filter dimensions and flow rate. Apparently the 820 flows a little bit better. The holes in all the torn 820's probably help with flow rate too lol.


Are you saying the FL820 flows better because of the tears?

Or you actually have data that shows the 820 flows better than the 500? As I mentioned above, if a filter has a lower bypass setting it's usually an indication it flows better - ie, has less delta-p across the media.

 

[Canadastang]

Originally Posted By: ZeeOSix
Originally Posted By: Canadastang

The only difference seems to be bypass PSI, filter dimensions and flow rate. Apparently the 820 flows a little bit better. The holes in all the torn 820's probably help with flow rate too lol.


Are you saying the FL820 flows better because of the tears?

Or you actually have data that shows the 820 flows better than the 500? As I mentioned above, if a filter has a lower bypass setting it's usually an indication it flows better - ie, has less delta-p across the media.


There's a thread on here somewhere; a user indicated (IIRC) that the 820 flows 11-13 GPM and the 500 10-12 GPM. Bypass PSI for the 820 is 16 PSI and 9 for the 500 again, IIRC.

Not that it's an issue either way, I highly doubt any of the intended applications' oil pumps flow more than say maybe 4-5GPM

And yes, a torn 820 can probably flow like 100GPM. Maybe they're good for racing lol.