Is this a bit Hot

[targabill]

What do people see on there temp gauge? Do you think this is a bit hot?
82’ SC Targa..
Been driving for 30 minutes, steady at this temperature..

[wazzz]

Not hot for me but that also depends on ambient temp and how hard you run the engine. If it is steady, your outside thermostat is opening and regulating, so this is good.

[SlateBlueTarga]

This is a good reference pic. Thanks to whoever originally posted it.

John

[GH85Carrera]

30 years ago, when I bought my 85 911, I hated the vague no numbers temp gauge. I bought a new sender, and gauge insert. It was super easy to put in a numbered temp gauge. Then just a year or two later, my tach was bouncing around. That is almost always from the alternator overcharging.

I put in a volt meter under the tach, and it got rid of that stupid shift light.

I have driven for hours in 105+ degree temps, and the AC blowing cold. I had to install a fan on my front oil cooler. The fan simply works. And contrary to popular belief, even on the highway at 75 MPH, the fan helps. I tested that on August driving back from Savannah, GA in 100+ degree heat.

Since my 85 had a front cooler, but no factory fan, I had to add the fan. I was unwilling to buy a new oil cooler with the bung for the electric switch. My fan has a total human interface, a toggle switch I flip on once the temps get to 210, and back off once it is below 210.

[pmax]

Originally Posted by targabill

What do people see on there temp gauge? Do you think this is a bit hot?
82’ SC Targa..
Been driving for 30 minutes, steady at this temperature..

What's the ambient temp ?
In traffic, on the freeway, "mountain" roads ?

It depends.

At a constant 65 mph on a pleasant day, that's too high.

[PeteKz]

Best oil temps are between 212F/100C and 230F/110C-ish. Why? Above boiling temperature drives moisture out of the oil much faster than temps below boiling, and moisture is the internal enemy of an engine, especially one that does not get driven often. 230/110 is comfortably below the oxidation point of even cheap dinosaur oils.

Contrary to some popular opinion, cold oil is not good for an engine. In fact, many of our cars run oil temps too low during cool or cold days.

[fallingat120mph]

Originally Posted by targabill

What do people see on there temp gauge? Do you think this is a bit hot?
82’ SC Targa..
Been driving for 30 minutes, steady at this temperature..

I always thought this was normal (For the 3.2 anyway). I used to creep above that a bit in the Texas Hill Country on 90/95 degree days, driving pretty hard. When I get close or above the top white dash I usually take a break or call it a day...

I run VR-1 20/50.


Erik

[fallingat120mph]

Originally Posted by PeteKz

Best oil temps are between 212F/100C and 230F/110C-ish. Why? Above boiling temperature drives moisture out of the oil much faster than temps below boiling, and moisture is the internal enemy of an engine, especially one that does not get driven often. 230/110 is comfortably below the oxidation point of even cheap dinosaur oils.

Contrary to some popular opinion, cold oil is not good for an engine. In fact, many of our cars run oil temps too low during cool or cold days.

Just reading about this - I have a couple old BMW bikes and same goes for the old air/oil cooled.

Got to drive them and ride them

Erik

[wazzz]

Originally Posted by fallingat120mph

I always thought this was normal (For the 3.2 anyway). I used to creep above that a bit in the Texas Hill Country on 90/95 degree days, driving pretty hard. When I get close or above the top white dash I usually take a break or call it a day...

I run VR-1 20/50.


Erik

Pretty sure I've never seen mine reach the top white dash line in nearly 30 years of ownership. But if it should go that high, the heater blower in the engine compartment should kick in and help the engine cool down a bit. Hence the importance of the "over-engineered" heater relay.

[shadowjack1]

If you look under the lip of the gage, where the needle is pointing you will see the temp in C. You have got to get your head around the steering wheel.

[GH85Carrera]

Originally Posted by PeteKz

Best oil temps are between 212F/100C and 230F/110C-ish. Why? Above boiling temperature drives moisture out of the oil much faster than temps below boiling, and moisture is the internal enemy of an engine, especially one that does not get driven often. 230/110 is comfortably below the oxidation point of even cheap dinosaur oils.

Contrary to some popular opinion, cold oil is not good for an engine. In fact, many of our cars run oil temps too low during cool or cold days.

Yep. In sub freezing temps my oil temp will never get to up to 180. I keep the RPMs below 4,000 and even on a long highway trip of hours, the temps will not get enough to open the thermostat to the front cooler. I can't even check my oil level accurately with the temps that low.

At least the heater still works great in those temps!

[porschedude996]

You may see the calibration numbers if you look at the gauge face kinda hidden towards the bezel.

[$yncro]

I have a 80 sc and even with 30* Celsius weather, mine doesn't go that high after 30 min drive. Could be stop and go? Somebody mentioned blower fan kicking in once high temp reaches.. are you talking about alt fan or you have another blower in the engine comp? Just curious.

[MrBonus]

On a summer day or during spirited driving, I wouldn't think twice about that temperature.

[wazzz]

Originally Posted by $yncro

I have a 80 sc and even with 30* Celsius weather, mine doesn't go that high after 30 min drive. Could be stop and go? Somebody mentioned blower fan kicking in once high temp reaches.. are you talking about alt fan or you have another blower in the engine comp? Just curious.

Heater blower in the engine comp, but that's only for Carrera 3.2, not for SC.

[pmax]

Drove the SC on a nice 70F day, temp gauge pegged at the first white bar even after 15 minutes of idling while I measured the temps using the IR gun, oil filter at 200-210F ... exhaust ports around 450-500F give or take a bunch, hard to get a good bead on those.

[A930Rocket]

On the 930, the mark circled in red is 212*. Probably the same for others.

[David Inc.]

Cruising along at the highway at 3,000rpm that would strike me as warm. Spirited driving at lower speeds that would be expected.

[fallingat120mph]

So, yesterday with the temperature at 90 degrees (32C ?) and humidity around 60-70% (dew point 68-74 per app) averaging 75-85 miles per hour (may have been higher???), for nearly an hour, here in the Midwest, this was my reading -I may have been in fourth as I was getting ready to exit the interstate:




This engine has 200,000 miles on it with a broken headstud, and some seepage near the front oil cooler in the lines. AC has been removed (so, no AC running) and I use Valvoline 20/50 oil...

Anyway, just contributing...


Erik