MHD sport cooling

[Hasan]

I don’t think the crank case pressure is that low. However, your point on evaporation makes sense.
In addition, the fuel consumption goes up significantly on sports cooling targets. Which would result in higher dilution in the engine oil.
I still believe the oil temperature closer to 100C is better than 90C. Perhaps I’m too old.

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[Subydude]

I don’t think the crank case pressure is that low. However, your point on evaporation makes sense.
In addition, the fuel consumption goes up significantly on sports cooling targets. Which would result in higher dilution in the engine oil.
I still believe the oil temperature closer to 100C is better than 90C. Perhaps I’m too old.

Without running a true vacuum gauge, it's hard to tell because the readout on the MHD gauges doesn't seem to show much below 1 bar absolute. Most other engines I've worked with will be running around 3.5-5 psi or that .3-.4 bar absolute. It'd be an interesting test to see if the gauge is right and the engine is truly almost at atmospheric, or if it's the more normal low value.

The consumption is something I noticed also, which makes sense since engines get more efficient at higher coolant temps. I only noticed about a 1 mpg drop (30 down to 29) when I enabled it, but I have to imagine that every car is different as are the conditions it's being driven in.

Given how robust the B58 is, I don't see anything wrong with wanting to leave it alone. I just also don't see anything wrong with running sport cooling mode. I have to imagine 30C in general temps for plastic will help longevity. My car still gets to 230F coolant and 275F oil temp on track in summer here, and I'm not worried about that since it's already not that far off stock running temps. I just use the sport cooling to start at a lower target which gives more laps.