Quote:
Originally Posted by Formulas
The whole unfiltered oil concept is a little deceiving to me as soon as you hear that most peoples thoughts go to immediate engine death OMG should never happen not one drop, But if you step back from the Clift and analyze the life of a drop of oil, It goes in clean and gets filtered most if not all the time one pass or another because they are designed to keep oil clean so there should not be a chunk of death waiting at the door in case of a bypass and if there is your engine is probably disintegrating at that moment and nearly no filtration system known to man is going to help
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I agree, oil going thru the bypass basically never kills parts in the rotating assembly. It may leave a scar in a bearing, or a leave a score some place, but that is about it. Most flat tappet cams the lifter bleed rates are loose enough they can eat some debre and sludge and still function.
I do the filtering upgrades on Pontiac’s when the engine has a roller set up to prevent unfiltered oil that a shard of metal or piece of debre getting in the galley feed. It is extra prevention to keep the lifter’s feed free and clear on roller set ups to prevent collapse lifters and extend needle bearing life. That stuff does not apply to as much to splash fed mechanical lifters or a stock engine.
A secondary reason is after destroying engine bearings, with Pontiac’s stock bypass we did not save any of the roller cam parts when that happened, they galleys are all full of metal filings and everything is a mess. $$$$ of roller parts into the scrap barrel. After we started doing filtering upgrades with either the bypass blocked or higher bypass pressures, the roller valve terrain parts usually can get reused after an engine failure.