Redline and warm up time
03-18-2019, 06:17 AM
#1
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Redline and warm up time
So, I like to be sure my s8 is adequately warmed up before dropping into sport mode or pushing her a little harder. When I start up first thing in the morning the redline is 5,400 and drops back to 6,400 after 5-10 minutes of driving. I typically use the redline adjustment to assume she's warm. Am I being too conservative? Anyone else with me? Doing anything else?
03-20-2019, 01:02 PM
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I've tried to pay attention to the temp gauge since I read this. Seems that it gets up to temp before the redline adjusts from 5,400 up to 6,400 - at least according to my observation. And, I still wouldn't consider my driving anything near full throttle or redline, just a little more spirited in sport mode 😁😉
03-21-2019, 06:34 AM
#5
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You might also want to consider that it takes longer for the oil to get to 'operating temperature' than it does for the coolant. I've heard from racing mechanics that it can be as much as 3X as long.
Gary
Gary
03-21-2019, 07:55 AM
#6
This can be seen to be absolutely true in Porsches where the oil and coolant temperature are reported for the driver. Coolant temp is up to operating level within 2 or 3 miles, but all of mine have taken about 10 miles for the oil temp to reach operating temperature.
03-21-2019, 08:00 AM
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Thanks for the input. I think there is a vag-com option to add a lap timer that also shows oil temp...
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03-21-2019, 09:44 AM
#8
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Correct. And as you will likely observe, the redline reduction at cold seems tied to oil temp in reality, which makes sense to me--as opposed to coolant. Both are going to tend to be coupled until temps and load get high when oil temp will rise more. The lap display doesn't show oil temp below a certain temp (150F IIRC??), and when it displays a temp is right when redline reduction goes away. Sorry, a little vague because the display mod got blown up when dealer refreshed mine--either an MMI update or ECU/instruments when the fuel reading got flaky after fill up. I need to put it back still; novelty of it sort of wore off after a while.
03-21-2019, 10:01 AM
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Correct. And as you will likely observe, the redline reduction at cold seems tied to oil temp in reality, which makes sense to me--as opposed to coolant. Both are going to tend to be coupled until temps and load get high when oil temp will rise more. The lap display doesn't show oil temp below a certain temp (150F IIRC??), and when it displays a temp is right when redline reduction goes away. Sorry, a little vague because the display mod got blown up when dealer refreshed mine--either an MMI update or ECU/instruments when the fuel reading got flaky after fill up. I need to put it back still; novelty of it sort of wore off after a while.
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