when starting a cold engine... which DIC data
Thread Starter
Team Owner
Joined: Apr 2001
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From: S.W. Ohio. . . . . . NRA Life Member
when starting a cold engine... which DIC data
do you look at to determine when it's OK to smile and say "Lets Rock".
At first I thought oil temp... but then I was thinking tranny temp (A4).
Wondering what youz C5 peeps have your DIC set to; and what value to you like to see before getting on it.
At first I thought oil temp... but then I was thinking tranny temp (A4).
Wondering what youz C5 peeps have your DIC set to; and what value to you like to see before getting on it.
Burning Brakes
Joined: Jun 2005
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From: Jacksonville Florida
Before backing out of the driveway I check the oil temp and make sure it's at LEAST 100 degrees fahrenheit. Sounds a little high to guys up north but here in Miami that's a minute or two of idling. Next DIC option is coolant temp which I verify is warming up correctly and move on to tranny temp.
I like to have the tranny fluid warmed up to at least 100 - 125 before really getting on it. I do not have a deep sump pan or tranny cooler at the moment as I'm still rolling with the stock converter and gears. As such the fluid temp in the transmission gets to that range fairly quickly.
When just driving around I leave the DIC readout on coolant temp to keep an eye on it in case something goes wrong...
Last edited by Bounty; Feb 23, 2008 at 02:28 PM.
Tech Contributor
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From: Dyer, IN
I would think everything you need to know is right in front of you in analog form. Coolant temp, and oil pressure. I never get on it until the engine has reached operating temperature.
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Team Owner
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From: S.W. Ohio. . . . . . NRA Life Member
Le Mans Master
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From: PNW
Burning Brakes
Joined: Jan 2006
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From: Jacksonville Florida
This might sound strange, but I would think that the settings used which indicate CAG shifting should be optimum. I might have to double check this to see what the oil temp is though for the CAG's prompt.
Then again I guess it would also depend what you are getting ready to do, the quarter mile? Auto-cross?
Then again I guess it would also depend what you are getting ready to do, the quarter mile? Auto-cross?
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Le Mans Master
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From: PNW
Safety Car
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From: San Rafael CA
It is linked to engine coolant temperature (ECT) ... it "turns on" when the ECT reaches 169 degrees and then only engages between 15 and 19 MPH and at 20 percent throttle or less.
Last edited by BlackZ06; Feb 23, 2008 at 08:59 PM. Reason: Fix typo - 20 percent throttle
Safety Car
Joined: Jan 2001
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From: Boise ID
Gear Select (Skip Shift)
To ensure good fuel economy and compliance with federal fuel economy standards, SECOND and THIRD gears are inhibited when shifting out of FIRST gear under the following conditions:
Coolant temperature is above 50°C (122°F).
Vehicle speed is between 20 and 29 km/h (12 and 19 mph).
Throttle is opened 35 percent or less.
Safety Car
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From: San Rafael CA
That's what I do too. Since I can't monitor the tranny temps (manual) I use the DIC to watch oil temp and I will not do anything other than "granny" starts and acceleration until the oil hits 160. Once it's at 160 I feel OK going "heavy" into the throttle (say 3/4 pedal travel for a quick merge onto the highway) but for WOT I usually wait until oil is at least 180.
If I'm gonna get "serious" and really want to beat the car (say at a road course race track) then I want to see the oil temp stable for a lap (warm-up lap) at about 200 degrees. Then it's ***** to the walls baby ... beat that LSx engine like Chevy designed it to be beaten, and listen to the awesome sound it makes ....
Burning Brakes
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From: Arlington Texas
Tech Contributor
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From: Dyer, IN
I suppose the simplest answer to that is lack of change or steady state. When you first start the car, the temp is ambient. It will continue to increase, through the thermostat opening, until it reaches a temperature where there is little variation. Once you reach the point where there is little to no variation, you have reached operating temperature.
Melting Slicks
Joined: Apr 2007
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From: Willow Springs IL
I always wait until the OIL temp is 160F before getting on it. You could have a 180F water temp and still have oil that is under 100F.
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Team Owner
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From: S.W. Ohio. . . . . . NRA Life Member
Race Director
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From: Haymarket VA
I usually have mine set to instant average when I'm drivgin so that's what is usually up when I start the car. I immediately flip to oil temp before I drive off. I take it very easy 2000-2500 rpm until oil temp reaches 150 but wait until about 175 before I really slam it hard. Comp 921's a brittle buggers when cold.
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From: PNW
Tech Contributor
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From: Dyer, IN
