Zohan

Any one got a legend to this info screen? What is the meaning of all the bars red, blue, white
Thanks

Just J

White is current measurement.

Red is bad (too high or too low).

Blue is cold (e.g., not yet warmed up, best to take it easy).

At least, that's how I would read that.

Zohan

why red and blue bars show for the same parameter?

Noah Fect

They're just indicating the ranges in question. Some parameters like temperature have red zones for "Too hot to continue driving" and blue zones for "Temperature is normal but it's still too cold to jump on it." Other parameters like oil pressure are considered dangerously out of range at both ends of the scale, so both of their bars are red.

stealthboy

I think red means danger. In the cases of the top two temperatures, too low doesn't really indicate any danger, so that's why blue is used. It means cold in that case, which isn't bad.

Red also means beef if it's a bullion cube.

MarcusG

Slight tangent.

My 2013 June build C2S water temp rises to 194 F. and stays there indefinitely.

How about everyone else?

My oil temp usually stays around 192 - 210 F at the most.

I realize the water temp is just the idiot temp and stays there for peace of mind. Honestly wish it read an actual live temp at all times but it goes there and stays so not to worry us.

Just curious as to what others are reading? I noticed a couple others staying at 196 water temp.

Noah Fect

194F on my 981BS too. Annoying...

Tapeworm

Battery voltage is a bit boring. It's possible to configure these to other values - I have height above sea level instead of voltage for example.

wanderfalke

I have seen the oil temp push 250f on steep inclines under heavy throttle. 220f is more common when pushing it. I typically float around until the oil temp hits 190f that is the white bar I watch. Now i am reading here that the coolant reading is not actual?

chuck911

Why do you think its not the actual temp reading?

Coolant temp tends to stabilize because it is thermostatically regulated with a huge overhead cooling capacity. Oil temp stabilizes as well, but because oils primary function is lubrication not cooling its temperature is secondary to pressure, and so allowed greater variance. All these gauges display accurate live readings. They are not idiot lights.

Noah Fect

Not in the 981's case, per the Boxster Service Information Book. Looks like the 991 instrumentation works the same way. The 194F reading is just a meaningless placeholder indicating normal operating temperature.

The correct oil temp is displayed at all times, as I understand it.

Zohan

Water boils at 212f / Oil boils at + -400f at STP -sea laver / 14.5 psi. (Fluids in the engine are at higher pressures => will boil at higher temp.) antifreeze is a water / ethylene glycol mix - got higher boiling and lower freezing points.
Obviously the fluids should stay blow boiling temperatures as pressures are greatly increased above boiling point.
In a water cooled engines thermostat opens at around 190f sending coolant to to the radiator. This is what keeps water temp constant.

Some cars have oil / transmission fluid cooling system. In some cars oils is cooled from the coolant in the engine block. Coz oil temperature in 991 not very stable I don't think there is a oil cooling system in 991 engine.

Zohan

I guess I am confused because the red and blue bar values change as engine worms up. You would think that normal operating renege would be constant

Just J

It could be that the graphs are having they're scales adjusted. Just to pull some numbers of of thin air for the purposes of illustration, let's say this is the oil temp situation when cold:

And this is the situation when warmed up
This way, they have effectively "zoomed in" on the optimum operating temp range of 150-250 to give the indication better precision between those values.

Zohan

Donnoo, maybe u are right. this info should be in a owners manual