Originally Posted By: 1JZ_E46
Race engines flow an incredible amount of oil, more than typical media can handle without bypassing, so they use a more porous media to increase flow at the expense of efficiency.
Originally Posted By: dlundblad
Fram says something about for racing use only too, which I find interesting. Are they around 50% effecient?
Originally Posted By: 69Torino
Ultra media is very efficient, and efficiency sacrifices flow usually. The Fram HP line is not efficient (as far as particulate removal) but flows like crazy.
A lot of bad information here.
Racing only usage? No. Fram says they can be used on the street, everday use. Really the media they use looks kinda typical. Strong blended glass fiber and paper media, made to take abuse. Street, yes.
Efficiency bad? No, it filters very well. 94% at 20 microns is better than most of the the oil filters out there. Not bad at all. Close to a Wix NapaGold rating actually. Range of %'s at 20 microns of all filters you can get are around ~50% to 99.5%, so this one is quite good at 94%. ....
http://www.fram.com/media/1075/fram-racing-filter-sell-sheet.pdf
They could have used the Fram Ultra's media. It flows just fine. I'm not sure why they went with the glass fiber paper blend type. It does work though.
*Metal end caps
*silicone adbv
*extremely thick tapping plate and can
*screen over bypass valve
*94% efficient @ 20 microns
Originally Posted By: Motorking
Originally Posted By: CT8
They have the screen over the bypass Like the Tough Guard used to have. I wonder why the U G element isn't used?
This filter media was engineered for flow, not capacity. It is a real nice balance of high flow and decent 94%@20 mcron efficiency. Still has enough capacity to meet OE change interval of any modern high performance car.
https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4346078/1