Renesis OIL PRESSURE Discussion with Dealer Tech
#476
Registered
Filter bypass, think of the way a blower bypass valve works.
The filter bypass opens when the pressure difference between pre-filter and post filter is greater than the spring pressure.
The filter bypass opens due to a clogged oil filter.
The filter bypass opens when the pressure difference between pre-filter and post filter is greater than the spring pressure.
The filter bypass opens due to a clogged oil filter.
#477
Ayrton Senna Forever
Am I missing something? If oil is getting bypassed, then it is going back into the pan (unfiltered, but so what?).When it gets picked up again, any oil that finds it's way into the engine must go through the filter first. So it shouldn't matter if bypassed oil isn't getting filtered because it's not getting used for lubrication/cooling. What's the prob, Bob?
Actually the problem is the low oil pressure in the e-shaft, I think.
#478
Ayrton Senna Forever
It's not supposed to. It's got a setting designed to protect parts if there was a problem like a clogged filter or something else that could be catastrophic.
Under some really adverse condition , it would relieve; like a fuse protecting expensive electrical components.
Paul.
Under some really adverse condition , it would relieve; like a fuse protecting expensive electrical components.
Paul.
Where is the 65-71 PSI control valve (regulator) in the S1's oil system, if the front valve has 156 PSI (emergency), and the rear valve has 78-92,5 PSI?
A lot of people see max 71-80 PSI oil pressure, so this 65-71 PSI control valve could not be a print error.
#480
Ayrton Senna Forever
...and pressure drop from an emergency 156 PSI to 71 PSI? There is no reason for it. It is too much. ???
#481
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I imagine that the valve is unable to dump the full volume of oil supplied by the pump at ~70 psi, in which case you would see a little bit higher pressure on your gauges.
#483
Ayrton Senna Forever
This is the table that confused me (attached).
According to this, we have an oil pump pressure regulator with 64-71 PSI in the S1 Renesis. We call it front regulator valve. Our gauges show that this is the valve that determines the max oil pressure in the S1 Renesis, because our max pressure is between 71-80 PSI.
So what about the rear regulator? Is this table wrong, and the 64-71 PSI regulator is the rear one instead of the front, and we have the same oil pump regulator (front valve) like in the S2 (156PSI or something high open pressure emergency valve)?
Paul said that the front valve usually never moves, so if it is true, we can't have 64-71 PSI oil pump regulator (front valve).
One thing is sure (according to the gauges), we have an 64-71 PSI regulator in the system, but where?
According to this, we have an oil pump pressure regulator with 64-71 PSI in the S1 Renesis. We call it front regulator valve. Our gauges show that this is the valve that determines the max oil pressure in the S1 Renesis, because our max pressure is between 71-80 PSI.
So what about the rear regulator? Is this table wrong, and the 64-71 PSI regulator is the rear one instead of the front, and we have the same oil pump regulator (front valve) like in the S2 (156PSI or something high open pressure emergency valve)?
Paul said that the front valve usually never moves, so if it is true, we can't have 64-71 PSI oil pump regulator (front valve).
One thing is sure (according to the gauges), we have an 64-71 PSI regulator in the system, but where?
Last edited by ayrton012; 11-03-2009 at 01:29 AM. Reason: more detail
#484
Super Moderator
Thread Starter
As I have said before IMO this table is in error..
The Front "relief" valve should still be set to relief in the event Oil Pressure Exceeds 156 PSI, the reason I say this is because FC, FD RX-7's are 156 PSI and IMO earlier rotaries have had a similar relief valve pressure...as Paul says in the event of a failure in the system somewhere this front valve opens to relieve pressure at 156 PSI.
I somehow don't believe the Series 1 figures listed are for this O Pump Relief, but are for the REAR By Pass Valve.
Remember the series II does not have a Rear By Pass Valve, but an external OCV (Oil Control Valve) on the Left side on top of front timing cover, this valve is a Spool Stepper Valve arrangement that controls by pass to oil pan and also oil supply to the two EMOP's and has an Oil Diversion or Cleaning Mode, and I can't find the "Actual By Passing Pressures" for the Series II, even in the 09 factory WS manual.
All I can find is the Oil Pressure reference is 50% higher than S1 at 212F @3000 RPM, 72.5 PSI to 50.8 for Series I, this is where I believe the S1 can cope with an increased Rear BP pressure of around 20 PSI, some don't agree, but as I have also said all internals of these two engines are the same and could cope with an OP increase.
The Front "relief" valve should still be set to relief in the event Oil Pressure Exceeds 156 PSI, the reason I say this is because FC, FD RX-7's are 156 PSI and IMO earlier rotaries have had a similar relief valve pressure...as Paul says in the event of a failure in the system somewhere this front valve opens to relieve pressure at 156 PSI.
I somehow don't believe the Series 1 figures listed are for this O Pump Relief, but are for the REAR By Pass Valve.
Remember the series II does not have a Rear By Pass Valve, but an external OCV (Oil Control Valve) on the Left side on top of front timing cover, this valve is a Spool Stepper Valve arrangement that controls by pass to oil pan and also oil supply to the two EMOP's and has an Oil Diversion or Cleaning Mode, and I can't find the "Actual By Passing Pressures" for the Series II, even in the 09 factory WS manual.
All I can find is the Oil Pressure reference is 50% higher than S1 at 212F @3000 RPM, 72.5 PSI to 50.8 for Series I, this is where I believe the S1 can cope with an increased Rear BP pressure of around 20 PSI, some don't agree, but as I have also said all internals of these two engines are the same and could cope with an OP increase.
#485
Ayrton Senna Forever
Thank you, now it is almost clean.
Almost, because the European Service Bulletin writes about a 78-92,5 PSI OR MORE !!! control valve, but everybody who has gauge see max 71-80 PSI oil pressure. So is it a print error, or (and) we have a 64-71 PSI regulator in the system which justify our gauges?
"• An oil pressure regulator has been adopted on the rear side housing to release oil when the oil pressure is 538-638 kPa {5.5-6.5 kgf/cm2, 78.0-92.5 psi} or more."
Almost, because the European Service Bulletin writes about a 78-92,5 PSI OR MORE !!! control valve, but everybody who has gauge see max 71-80 PSI oil pressure. So is it a print error, or (and) we have a 64-71 PSI regulator in the system which justify our gauges?
"• An oil pressure regulator has been adopted on the rear side housing to release oil when the oil pressure is 538-638 kPa {5.5-6.5 kgf/cm2, 78.0-92.5 psi} or more."
#487
Super Moderator
Thread Starter
Thank you, now it is almost clean.
Almost, because the European Service Bulletin writes about a 78-92,5 PSI OR MORE !!! control valve, but everybody who has gauge see max 71-80 PSI oil pressure. So is it a print error, or (and) we have a 64-71 PSI regulator in the system which justify our gauges?
"• An oil pressure regulator has been adopted on the rear side housing to release oil when the oil pressure is 538-638 kPa {5.5-6.5 kgf/cm2, 78.0-92.5 psi} or more."
Almost, because the European Service Bulletin writes about a 78-92,5 PSI OR MORE !!! control valve, but everybody who has gauge see max 71-80 PSI oil pressure. So is it a print error, or (and) we have a 64-71 PSI regulator in the system which justify our gauges?
"• An oil pressure regulator has been adopted on the rear side housing to release oil when the oil pressure is 538-638 kPa {5.5-6.5 kgf/cm2, 78.0-92.5 psi} or more."
So what ever the by pass was 33 years ago, it is the same today.
This is my point, you have a Rotary that Revs far higher than 33 years ago but with the same oil pressure in the e-shaft.
IMO for Internal Oil Lubrication and Oil Cooling it should be slightly higher, because most owners are actually 'Using' this higher rev range.
Your Diagram is a good one to show how it works and why crushing or shortening the spring travel will increase BP Pressure.
Last edited by ASH8; 11-03-2009 at 02:45 PM.
#488
SARX Legend
iTrader: (46)
I did a little test very early this morning and once my temps were steady at around 180 degrees, I did a couple of hard runs to 8300RPM and then one hard run redlining each gear to 110MPH and at full song I was a tick under 80PSI.
#493
Ayrton Senna Forever
As I have said the rear valve 3648-14-250 was last used in an FC (in Mazda Parts Model code originally from a 1976 13B RX-4,5), so if it is the same it is the same.
So what ever the by pass was 33 years ago, it is the same today.
This is my point, you have a Rotary that Revs far higher than 33 years ago but with the same oil pressure in the e-shaft.
So what ever the by pass was 33 years ago, it is the same today.
This is my point, you have a Rotary that Revs far higher than 33 years ago but with the same oil pressure in the e-shaft.
Actually our gauges justify the 64-71 PSI regulator, so it's strange how Mazda informs its own services in the actual Europen WEB Service Bulletin (MESI).
We need max oil pressure data from FC owners with gauges, PLEASE!
#495
So if we should know the max oil pressure (by gauge) in an FC, than we should say that the 78-92,5 PSI S1 regulator data is a print error in the European Service Bulletin, and the 64-71 PSI regulator data is the good value.
Actually our gauges justify the 64-71 PSI regulator, so it's strange how Mazda informs its own services in the actual Europen WEB Service Bulletin (MESI).
We need max oil pressure data from FC owners with gauges, PLEASE!
Actually our gauges justify the 64-71 PSI regulator, so it's strange how Mazda informs its own services in the actual Europen WEB Service Bulletin (MESI).
We need max oil pressure data from FC owners with gauges, PLEASE!
#496
Ayrton Senna Forever
#497
This should be true but how much data is "interpreted\translated"? How much sees the revision due to political\marketing strategies? (ie, 1service every year\20.000km).
Our compression chart shows both the minimum and maximum graph line, while the american manuals i read only show one of the 2!
Strange things... anyway the oil pressure is what is reported by the almighty ASH8 so the 9x psi debate is just a moot point.
Our compression chart shows both the minimum and maximum graph line, while the american manuals i read only show one of the 2!
Strange things... anyway the oil pressure is what is reported by the almighty ASH8 so the 9x psi debate is just a moot point.
#498
Ayrton Senna Forever
This should be true but how much data is "interpreted\translated"? How much sees the revision due to political\marketing strategies? (ie, 1service every year\20.000km).
Our compression chart shows both the minimum and maximum graph line, while the american manuals i read only show one of the 2!
Strange things... anyway the oil pressure is what is reported by the almighty ASH8 so the 9x psi debate is just a moot point.
Our compression chart shows both the minimum and maximum graph line, while the american manuals i read only show one of the 2!
Strange things... anyway the oil pressure is what is reported by the almighty ASH8 so the 9x psi debate is just a moot point.
Last edited by ayrton012; 11-04-2009 at 07:48 AM.