Originally Posted By: Trav
So all this blather and still coming up empty on your Google searches eh.
Now the Toyota car is something else now, a "real racing car"? Its a stock 200 HP engine, not some boosted high HP monster.
So lets get this right your track car is nothing more than a driver ed car going around a few times and you are no more a racer than i am an Mao Mao fighter pilot.
Okay how does this bypass mode work? My stock Honda bike has 98 PSI minimum oil pressure at 1100 RPM before tripping a low OP warning, it uses a spin on oil filter.
So you are claiming you cant run high oil pressure because its limited by the oil filter bypass? In the case of the FA anything 24 PSI and over the filter is in bypass.
So what? Are you claiming that on 0w20 it cant make 24 PSI? So it will go into bypass even on 0w20, whats your point.
I have not latched on to anything i read factual info and have a lot of experience (since 1992) with 10w60 oil in street engines both car and bike as well as race prepped 4 stroke bikes.
Over 250,000 Km on one street engine alone run on nothing but 10w60 from the first regular OCI.
I guess it went quarter of a million Km in bypass and is still going strong 21 years later with the new owner.
This really does look like a racing engine. LOL Spec on the FA "race car" Its a stock engine.
Quote:
Type Production based 2.0l 4-cylinder, boxer, naturally aspirated
Direct injection
Compression 12,5 : 1
Bore /stroke 86mm / 86mm
Displacement1998cm³
Power /torque 200hp@ ~7000rpm 205Nm @ ~6400-6600rpm
Max.engine speed 7450rpm
I think you need to figure this bypass thing out some more.
Take a common spin on oil filter with a high teens to twenties bypass valve setting and tell me how much is being filtered at running RPM and normal oil pressure and oil temp. Could it be about 10%?
How much is being filtered at idle when oil pressure drops dramatically like on some older cars?
Will the 10w60 ever be thin enough so the filter is not in bypass mode at idle?
Will both oils be filtered through a full flow filter at idle?
Is it true that only about 10% of the oil is being filtered by a full flow filer with a bypass at any given time at RPM's above idle unless you have a bad pump or other low oil pressure issues?
Answer these questions and you will see your filter bypass arguments evaporate before you eyes.
I believe he was talking about the oil pump bypass/relief, not the one on the filter, which only activates when there is a pressure differential and is independent of actual operating/observed oil pressure.
Of course pump relief pressure is engine family (and sometimes engine) dependant and when an engine will engage the relief varies wildly as per my own examples I've provided with my SBF experience. And there are other engines (like a specific Mopar that was mentioned) that is apparently on the pressure relief all the time.