Thread: Short Oil Filter Application

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Originally Posted by 34_40

OK, I'll bite..

1. Are you really turning high rpm's or more just about town driving?
2. What about that adapter that turns the filter mount 90's and use a full size filter?

Not questioning your motives, just curious.

Mike,
While most of my driving is easy cruising I live out in the country and it is still a big rush to hit the skinny pedal and let it pull through the gears. I'll probably grow out of it some day, but not too soon
Like Dave says, the 90degree adapter might clear, but it puts a full size filter right into the motor mount. Some of the vans had a 90 degree skinny filter unit, but I don't like that approach much.

Originally Posted by Itoldyouso

I don't know if that guys theory holds any water (or oil ) in the real world, Roger. How much extra capacity can there be in that extra couple of inches? You figure, when you prefill a filter when changing it the thing only holds such a small amount and most of that is absorbed into the filter media. If there is an extra 4 oz in a longer one vs a short one, I would think that would not be enough storage capacity to even contribute anything.

When I swapped the 5.0 Ford into my old Jeep pickup I had to use that Volvo filter as the steering box was right there. I abused that thing regularly and towed trailers long distances at times with no oiling problems ever.

Don

Don,
I think the issue is that the larger filter has about four times the filter surface area of the super shorty, so if you push it to high rpm the oil volume increases and all of that oil is forced through the filter media. With the full size it handles the duty, but with only 1/4 (or less) the surface the super shorty creates high differential, and the pump bypasses the filter.

Another thing that is a bit bothersome is that one guy shared that because of the severe piston to rod angles created by the extended stroke of the 347 they tend to be relatively short life engines compared to the stock 302 or even the 331. His thought was "Why take the chance of any oiling problems when you're already trying to cheat the clock on internal wear?" I haven't sorted that one out yet, but I have a hard time arguing with the filter differential/bypass situation.

Just so we're all thinking of the same things, this "super short" filter is pretty small. Here's pictures of the three different WIX filters, all which fit the standard Ford 3/4x16 filter nipple.
Here's the full sizeWIX 51515.png
And the mid-size/shortyWIX 51085.png
And the super shortyWIX 51335.png The super shorty measures just 2" on the straight side.