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Turbo Timer Question...how long?
Posted 25 April 2004 - 05:49 PM
Posted 25 April 2004 - 08:33 PM
On a turbo car with no oil cooler, I dont belive in T-timers. The oil just does not get cool only running thru the pan at idle. The WRX's do ahve a cooler...it runs thru the rad. So the oil, in theory is around 180-195 deg. However...temp at the pan on the EA82T is about 220-240....hm. Sit and idle, it will get warmer and stay there no matter how long it runs.
Now, Ive got an oil cooler adapter for sale....its $35 shipped....if you want it.
Posted 25 April 2004 - 11:08 PM
"It is highly recommended to let the engine idle for one minute after heavy hightway driving before shutting it down.
Idling for one minute before shutdown of the engine helps to assure maximum performance of the turbocharger for years to come.
This one minute period of idleing allows the turbocharger to stop spinning and cool down while oil is circulated through the turbocharger by the running engine.
These percautions are common practice in the industry with high performance turbocharged engines."
So there you have it from the horses mouth.
Posted 26 April 2004 - 12:32 AM
Posted 26 April 2004 - 12:53 AM
Our turbo's are also water cooled. Water is a much better heat dissapater (sp?) than oil. So allowing the car to idle a bit before shut down allows the coolant to cycle and pull the heat out of the turbo bearings. It also keeps the oil circulating through the hot bearings, not allowing it to sit and burn. If too much burnt oil is present in the bearings, they begin to wear quicker. Eventually this leads to making the turbo ineffective. Most people call this process "coking".
So, i feel its not about the hot oil, but about the hot bearings.
I run 30 seconds standard on my RX, occasionally she gets more if I deem it neccasary. Sometimes even less.
Posted 26 April 2004 - 01:11 AM
WJM that was a great set up for an oil cooler sale. Thats a good thing as I have one of those adaptors all set up on my car from you. It now runs cooler on a day like today with close to 100 deg. temps and the A/C on.
as for my turbo timer it is also a boost guage and knows when you have been running hard. It alters you idle time off of that. I make a lot of short trips so my base setting is at 30 sec. after a good drive I may see closer to 60 sec.
yes coking is the term.
Posted 26 April 2004 - 06:23 AM
Now for someone who drives on the insterstate, comes off, has an immediate right turn, then into a parking and bam you are there...then i see a real need to let it cool...it hasnt had a chance to!
Posted 26 April 2004 - 08:06 PM
thanks for the input all! After I make this work I will let you know how it goes!
Posted 26 April 2004 - 08:18 PM
Posted 27 April 2004 - 02:37 PM
Posted 27 April 2004 - 06:44 PM
Posted 28 April 2004 - 07:57 PM
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