Oil system mods for Track

[Qmulus]

Originally Posted by Gelbster

This may help explain how they proved the lubrication deficiencies had been corrected - but how?
https://www.youtube.com/watch?v=fv53RbvgfGc

Gee, I wonder why they made that fixture..? Not really. They obviously found the oiling issues on the M96/97 that those racing them are just finding now and realized that they had to do something about it. This is a much bigger problem than the IMS on tracked cars. It is a bit interesting that getting rid of the IMS on the newer engines also helped the oiling issue.

[jaykay]

Why would an oil to coolant htxchr be helpful to any great degree on track? I would imagine the differential temperature would be quite useless in driving heat transfer from the oil when things get hot.

An oil to air htxchr is what would work to cool oil.....just like what has been used on ic engines for decades

[JFP in PA]

Originally Posted by jaykay

Why would an oil to coolant htxchr be helpful to any great degree on track? I would imagine the differential temperature would be quite useless in driving heat transfer from the oil when things get hot.

An oil to air htxchr is what would work to cool oil.....just like what has been used on ic engines for decades

One word: efficiency. Because liquid heat exchangers are more efficient at transferring heat than oil to air units, they can be much smaller. To use an oil to air unit that has the heat transfer capability of an S cooler, you would need one that would be more than three times the size of the oil to water unit, and then the question becomes where would you put it so it got enough air flow over it, keeping in mind that the oil pump in these engines preclude running it at the front of the car. People seem to forget that there is often a 30-40 degree temperature differential between the coolant (even when hot) and the oil, so there is plenty of temperature difference to accomplish cooling the oil.

[jaykay]

Originally Posted by JFP in PA

One word: efficiency. Because liquid heat exchangers are more efficient at transferring heat than oil to air units, they can be much smaller. To use an oil to air unit that has the heat transfer capability of an S cooler, you would need one that would be more than three times the size of the oil to water unit, and then the question becomes where would you put it so it got enough air flow over it, keeping in mind that the oil pump in these engines preclude running it at the front of the car. People seem to forget that there is often a 30-40 degree temperature differential between the coolant (even when hot) and the oil, so there is plenty of temperature difference to accomplish cooling the oil.

Excellent food for thought as usual JFP...

[Qmulus]

Originally Posted by JFP in PA

One word: efficiency. Because liquid heat exchangers are more efficient at transferring heat than oil to air units, they can be much smaller. To use an oil to air unit that has the heat transfer capability of an S cooler, you would need one that would be more than three times the size of the oil to water unit, and then the question becomes where would you put it so it got enough air flow over it, keeping in mind that the oil pump in these engines preclude running it at the front of the car. People seem to forget that there is often a 30-40 degree temperature differential between the coolant (even when hot) and the oil, so there is plenty of temperature difference to accomplish cooling the oil.

^ What he said. Porsche obviously knew about air to oil coolers. They used them for decades on the air cooled cars. The thing is, it is quite easy to add an appropriately sized oil to coolant heat exchanger and then design the coolant system to work with the thermal load imposed by both oil and coolant. It works for the 911 Turbo as well and if anything would need lots of cooling, a turbo car would.