Food for thought….2016 Polaris Axys Electronic Oil Pump configuration.
The new 800 HO in the Axys platforms switch to electronic oil injection was exciting, but after seeing the table controlling oil delivery in reference to atmospheric pressure we were stunned. Attached is one of the factory oil injection tables.
The picture shows RPM on the left column, Intake Air Pressure across the top and the numbers in the table are percentages of oil output. At sea Level the atmospheric pressure is roughly 14.7 PSI so the sleds are configured to provide nearly 100% of the configured flow (There are other tables relative to TPS and other parameters that control output). At 5000-7000 feet you are roughly 11-12 PSI atmospheric pressure so oil delivery under max load has been reduced by nearly 20%. At 8000-11000 feet you are roughly 10 PSI atmospheric pressure resulting in a reduction of roughly 30% under max load! This compensation has likely been added to maintain a more consistent oil ratio than previous year sleds but it results in a significant decrease in oiling. This is vastly different than a traditional oiling system where output remains constant with elevation.
This concerned us from a turbo manufacturers perspective as we are “sharing” the engine oil supply with our turbo. While the turbo adds very little oil demand when you combine two of the engine oil ports on one circuit you reduce oil flow to each bearing. This coupled with the pre defined oil flow reduction at altitude leads us to believe that engine durability could be compromised for any sled operated at altitude. We know there are going to be people out there who think this must be the right way and Polaris would never do anything to compromise durability but that isn’t accurate. They need to balance several pieces of the puzzle and unfortunately they are forced to make sacrifices. We have spoken with several engine builders about this issue and they agree with our approach and recognize the only drawback to increasing the oil output is the additional 40-50 dollars a year you will spend on oil.
Silber Turbos was initially committed to keeping this information under our hat believing this puts our competitors at a disadvantage, especially those lubing the turbo with the factory system. We now see this as an opportunity to provide a service to all the Axys owners, especially the turbo ones. We now have reflash kits available for all Axys sleds that will provide constant oiling to the motor at elevation without changing any additional parameters. This will work for all 2015-2016 800HO sleds and will not effect the tune of piggyback systems or interfere with other turbo manufacturers kits.
You can PM me for pricing.
The new 800 HO in the Axys platforms switch to electronic oil injection was exciting, but after seeing the table controlling oil delivery in reference to atmospheric pressure we were stunned. Attached is one of the factory oil injection tables.
The picture shows RPM on the left column, Intake Air Pressure across the top and the numbers in the table are percentages of oil output. At sea Level the atmospheric pressure is roughly 14.7 PSI so the sleds are configured to provide nearly 100% of the configured flow (There are other tables relative to TPS and other parameters that control output). At 5000-7000 feet you are roughly 11-12 PSI atmospheric pressure so oil delivery under max load has been reduced by nearly 20%. At 8000-11000 feet you are roughly 10 PSI atmospheric pressure resulting in a reduction of roughly 30% under max load! This compensation has likely been added to maintain a more consistent oil ratio than previous year sleds but it results in a significant decrease in oiling. This is vastly different than a traditional oiling system where output remains constant with elevation.
This concerned us from a turbo manufacturers perspective as we are “sharing” the engine oil supply with our turbo. While the turbo adds very little oil demand when you combine two of the engine oil ports on one circuit you reduce oil flow to each bearing. This coupled with the pre defined oil flow reduction at altitude leads us to believe that engine durability could be compromised for any sled operated at altitude. We know there are going to be people out there who think this must be the right way and Polaris would never do anything to compromise durability but that isn’t accurate. They need to balance several pieces of the puzzle and unfortunately they are forced to make sacrifices. We have spoken with several engine builders about this issue and they agree with our approach and recognize the only drawback to increasing the oil output is the additional 40-50 dollars a year you will spend on oil.
Silber Turbos was initially committed to keeping this information under our hat believing this puts our competitors at a disadvantage, especially those lubing the turbo with the factory system. We now see this as an opportunity to provide a service to all the Axys owners, especially the turbo ones. We now have reflash kits available for all Axys sleds that will provide constant oiling to the motor at elevation without changing any additional parameters. This will work for all 2015-2016 800HO sleds and will not effect the tune of piggyback systems or interfere with other turbo manufacturers kits.
You can PM me for pricing.
