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View Poll Results: For all you EOCers: after a cold startup, how long to you wait before EOCing?
Immediately 13 72.22%
After the engine is idling normally 5 27.78%
After the engine is fully warmed up 0 0%
Voters: 18. You may not vote on this poll

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Old 09-29-2014, 11:12 AM   #1 (permalink)
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For all you EOCers: after a cold start when do YOU start EOCing?

I start once the engine is idling normally, when the cold engine enrichment mode is finished.

When preheating with my block heater, I start the engine at 115F on a 50F morning, and it takes about 30 seconds of running before it is idling normally.

When starting cold at work from 70F, it takes about a minute for the coolant to reach 100F and the engine to idle normally.


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Old 09-29-2014, 11:43 AM   #2 (permalink)
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In the Black Widow I would start EOCing within a hundred yards of my driveway, where the first stop sign is.
It's easier to re-start with a warm engine of course, but hey, gas is gas and if the motor isn't on you aren't burning any.
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Old 09-29-2014, 12:26 PM   #3 (permalink)
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Define 'fully warmed up'.

I'll first engine off once the coolant hits it's normal spot, plus a few km. I don't want more cold starts than necessary.

My Fiat has auto stop start and will switch of once the coolant reaches about 60*C, which is a bit low for my liking so I leave stop start off until 88*C (normal coolant temp).

In either case the engine won't be fully up to temp for many more miles.
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Old 09-29-2014, 12:31 PM   #4 (permalink)
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EOC is more optimal than burning gas at any temp.

Except in the winter. Heat coming out of the vents is more optimal then.
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Old 09-29-2014, 12:38 PM   #5 (permalink)
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As soon as I reach the crest of the hill ~100 yards from my driveway. If you want good mileage, EOC is even more important at the start, because the ecu is programmed to burn extra fuel to warm up faster.
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Old 09-29-2014, 01:10 PM   #6 (permalink)
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Quote:
Originally Posted by oldtamiyaphile View Post
Define 'fully warmed up'.
I guess 'warmed up' can be broken into two levels: 'Operating Temperature' and "Fully Warmed Up', which are two different things.

Operating Temperature - thermostat opening temperature, which is 177F on my car, normal for a 180F thermostat in cooler ambient temperatures

Fully Warmed Up - thermostat opening temperature plus half an hour (or maybe an hour?); the time it takes for the engine oil to be fully warmed up and all the residual water/hydrocarbon vapours to be fully boiled off.
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Old 09-29-2014, 01:52 PM   #7 (permalink)
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Quote:
Originally Posted by Fat Charlie View Post
EOC is more optimal than burning gas at any temp.

Except in the winter. Heat coming out of the vents is more optimal then.
+1. To me comfort from the cold outweights a few MPG.
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Old 09-29-2014, 02:03 PM   #8 (permalink)
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In winter, I often don't reach "operating temperature", even after 10 miles. I employ the DWG technique.

Driving with gloves.
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Old 09-29-2014, 02:06 PM   #9 (permalink)
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In winter, I often don't reach "operating temperature", even after 10 miles. I employ the DWG technique.

Driving with gloves.
Does Texas really get that cold?
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Old 09-29-2014, 03:37 PM   #10 (permalink)
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They think 40 is cold.

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