Hengst H97W05 (7317 size) has few inlet holes

S

SC Maintenance

Joined
Jun 8, 2022
Messages
5,572
Threw this Hengst filter on an order from Rock Auto. Was hoping it was made in the plant her in South Carolina, but this one is made in Poland. Seems like a nice heavy filter. However it has fewer inlet holes than any other filter this size I have seen.

Compared to the OEM Nissan filter - pictured - the Hengst has 6 inlet holes at 6mm diameter each. The Nissan has 8 holes, also 6mm diameter.

For additional comparison, I have a standard Wix and Denso, both have 8 holes at about 6mm each. I have a Champ XL and Fram XG 7317 and they have more and or larger holes.

So I assume Hengst knows what there doing here - but this does seem a little concerning. No?

IMG_1374.JPG
IMG_1377.JPG


1704685977345.jpg
 
SC Maintenance said:
However it has fewer inlet holes than any other filter this size I have seen.
Click to expand...
Plenty of total base plate hole area in all of those filters ... nothing to worry about. A base plate like that only produces about 2 to 3 PSI of dP at 10 GPM and only ~ 0.5 PSI of dP at 5 GPM with cold oil (500 cSt). Even less with hot oil (10 ~ 15 cSt). And who drives around with cold oil causing the engine's oil pump to be putting out 10 GPM? 😄

The positive displacement oil pump doesn't care about 2 to 3 PSI of dP. The same oil volume is going to be forced through the filter as long as the pump stays out of pressure relief. The oiling system uses a PD pump for a reason ... to keep the volume per RPM the same regardelss of the downstream restiction.
 
Last edited:
Running one now on my ‘06 Honda Odyssey from Rockauto with Mobil 1 0w-20 EP.

All seems good to me! Maybe in the spring when it comes off I will cut it open.
 
A popular topic that has been covered before:

Holes.... What's with the holes?

Holes... I know how we love to dissect filters here. (Literally) Seeing how there's a thread on louvers and all. I've noticed "most" holes in the base plates of filters are round. They differ in size and quantity. There are some oval and teardrop (FRAM Titanium) for example. I just wonder...
bobistheoilguy.com

fram inlet holes

Recently while I was at Wal Mart, I looked at the PH line of fram filters to see if any had the new silicone ADBV. The PH10060 had one, but I did notice the holes in the center tube seemed small, smaller than I remember seeing on Frams. The TG and XG 10060 were the same, small holes. Would this...
bobistheoilguy.com

Baseplate holes: Number and Size?

Since I have purchased my new Nissan Titan, I have been acquiring some oil filters for it. There seems to be a lot of different designs for the number and size of holes that let the oil into the filter. So far the Wix filter seems to have the most surface area "holed out" to provide flow to...
bobistheoilguy.com

Baseplate holes vs baseplate holes

Take two different filters,both for the same application. Would the filter with larger and more baseplate holes be better than the one with fewer,smaller baseplate holes?
bobistheoilguy.com

Number of holes matter?

Sadly my local Ford dealer seem to have run out of EFL90 oil filters for my 1975 Capri, so i am going to have to use something else. What i noticed though when browsing oil filters is that they have different number of holes in them. For example this Mann W916/1 has only four...
bobistheoilguy.com

Fram Ultra Inlet Holes

So I am not a FRAM guy, however I been considering running the FRAM Ultra. I decided to take a look at the filter at Walmart for previous QC issues I seen and both the Ultra and the Tough Guard were clean and I didn't see any visible issues. But one thing I noticed on both of them was the inlet...
bobistheoilguy.com

filter with 4 inlet holes for 4.6L V8!

Hi all, my next oil change i am going to try MANN FILTER W920/45, but that 4 inlets makes me hesitant as it may restrict flow of this big engine, what do you think?
bobistheoilguy.com

OIl filter holes too small on Fram Ultra?

After reading a lot of people like the Fram Ultra oil filters here on BITOG I have been using them with no problems on several vehicles. I wanted to put one on my sons boat. It has a 454 385 HP Chevy big block in a 27' Formula. He keeps it wide open most of the time. The holes on the Fram...
bobistheoilguy.com

Inlet holes in oil filters

I've noticed comments in several threads about the relative merits of the various size inlet holes of different filter brands. I think a lot of folks are missing something when it comes to judging a filter based on this criteria: the size of the outlet hole. As long as the combined total area...
bobistheoilguy.com

Are these Filter Holes comparable?

i took a pic of these 2 filters, do the inlet holes have a comparable surface area? it looks to me like the filter with the 8 smaller holes has more overall surface area. the filter with the 8 small holes is mahle brand and the other is mann, direct link for a bigger pic...
bobistheoilguy.com

Oil Filter Inflow Holes => Flow Rate?

Hey Guys and Gals, I was there at Walmart trying to decide on a better filter for my V6 Nissan engine. Would the Fram TG6607 (top pic) give me a better flow than Bosch 3300 (bottom pic) because Fram has more inflow holes and each is larger? This filter is specified for some motorcycles and...
bobistheoilguy.com

Different oil filters - reduced oil flow?

Gentlemen, out of a accident and curiosity me and a friend compared diffenrent oil filters in the garage. I was stunned to found out that the OEM one (BLUE) have 6 holes with 7mm diameter, this gives a cross sectional area of 231 square mm. In contrast, the black filter for this car by a...
bobistheoilguy.com

Fram baseplate differences

Does anyone know why various models of Fram filters have different baseplates? The holes are bigger than one and not the other, so you'd think the bigger holes would flow a bit better and it would make sense to use them on everything. Or am I overthinking it? The PH3614 for my Tacoma has the...
bobistheoilguy.com

Which Would "YOU" Prefer?

Forget that one oil filter has a base end bypass (M1-209) VS the other with a dome end bypass (FRAM-3600). Also, forget that one is a M1, the other a FRAM. Which oil filter would you prefer on your engine? The "type" with (6) oil inlet holes, or the "type" with (8) oil inlet holes? Why? I...
bobistheoilguy.com

Oil filter inlet and outlet?

This will seem a dumb question to those who know the answer, and yes I did try the search function. Does oil enter the filter through the slots in the base, or through the threaded stem onto which it is mounted? I have read both on this board. It seems as though it must enter through the slots...
bobistheoilguy.com

Fram Pro and Fram Drive observations

Fram Pro 9688 baseplate. Note number of inlet holes Now, fram Drive 3614 Not as many inlet holes. I doubt it makes big difference; I just noticed it. And here I thought Drive filter was wire backed but appears not. Pro filter is first, Fram Drive 2nd pic. 3rd pic is Fram Drive...
bobistheoilguy.com

OIl filter holes too small on Fram Ultra?

After reading a lot of people like the Fram Ultra oil filters here on BITOG I have been using them with no problems on several vehicles. I wanted to put one on my sons boat. It has a 454 385 HP Chevy big block in a 27' Formula. He keeps it wide open most of the time. The holes on the Fram...
bobistheoilguy.com
 
fantastic said:
It looks like the 6 holes are slightly larger than the Nissan filter w/more holes. Hengst being a OEM supplier & reputable brand I'd have no issues running it. Nice comparison.
Click to expand...
I measured them with a caliper, and they are the same - just under 6mm.. However I could have done some math before posting I suppose because the 6 together are around the size of a 14mm diameter single hole, as mentioned above. The thread is M20, so I doubt the hole in the middle of the exit tube is any more than 14mm - probably much less. However since 6 smaller holes will have more restriction to flow than a single large hole, however I doubt its a problem or Hengst wouldn't be selling them I suppose.

I just found it odd.
 
Last edited:
SC Maintenance said:
However since 6 smaller holes will have more restriction to flow than a single large hole
Click to expand...
Not always. The velocity through one large orifice can make the dP through it more than the same total flow going through 6 smaller orifices (with less flow velocity due to 1/6th the flow through each hole) that equal the same flow area as the one large hole/orifice. You would have to run the numbers through a good dP calculator - I've done that, and it showed what I explained.
 
SC Maintenance said:
I measured them with a caliper, and they are the same - just under 6mm.. However I could have done some math before posting I suppose because the 6 together are around the size of a 14mm diameter single hole, as mentioned above. The thread is M20, so I doubt the hole in the middle of the exit tube is any more than 14mm - probably much less. However since 6 smaller holes will have more restriction to flow than a single large hole, however I doubt its a problem or Hengst wouldn't be selling them I suppose.

I just found it odd.
Click to expand...
Your exactly Right, The builders have already done the Inlet to outlet flow design math & that is a good way to compare them. I would've questioned the same thing though.
 
DannyM said:
Click to expand...

Thanks, another great video from WCW. Interesting how different the filter produced in Mexico is compared to the one produced in Poland.

While we're at it, I noted the filter media areas from his other videos of the equivalent filters:
- Fram PH7317: ~103 in²
- Wix 57356: ~67 in²
- Hengst H97W05 (Mexico): ~96 in²
 
You must log in or register to reply here.

Similar threads

A
Hengst oil filter inflow holes changed, should I use this new filter??
2
Replies
35
Views
2K
Reloader59
7
Is this filter really 10 microns? At what efficiency? Or is it a mystery (Sierra Marine 18-7758)
Replies
15
Views
2K
oil pan 4
Mewbs
STP S3600XL Cut Open - New
Replies
14
Views
2K
Scott S
92saturnsl2
C&P - 4 filters (Valvoline IOC, Champion, Fram Ultra, Generic Hastings)
2
Replies
27
Views
4K
ZeeOSix
B
FRAM Fresh Breeze Drop In Quality?
Replies
13
Views
2K
PW01
Back
Top