View Single Post
Old 12-07-2012, 02:24 PM   #128 (permalink)
Daox
Administrator
 
Daox's Avatar
 
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,184

CM400E - '81 Honda CM400E
90 day: 51.49 mpg (US)

Daox's Grey Prius - '04 Toyota Prius
Team Toyota
90 day: 49.53 mpg (US)

Daox's Insight - '00 Honda Insight
90 day: 64.33 mpg (US)

Swarthy - '14 Mitsubishi Mirage DE
Mitsubishi
90 day: 56.69 mpg (US)
Thanks: 2,484
Thanked 2,553 Times in 1,537 Posts
The programming will be almost entirely based off of engine coolant temperature (I'll also open it up when the A/C is turned on). I don't see a need to have ambient temperature or vehicle speed effect things.

I plan on having it closed all the time until engine coolant hits around 200F / 93C. This should be well above the thermostat temp (so radiator is fully saturated at 200F) and still below the coolant fan turn on temperature. This will utilize the radiator only at the maximum delta temperature which allows greater cooling efficiency so that the time the grill block is open can be minimized. I'll shut the grill block when the coolant temp falls back down to around 190F / 88C which should be just above the thermostat opening temperature. If I find that this is cycling things too much I'll adjust it so that the block closes say... 15 seconds after the coolant temp hits 190F to give some time to cool down the radiator.
__________________
Current project: A better alternator delete
  Reply With Quote
The Following 3 Users Say Thank You to Daox For This Useful Post:
aerohead (12-07-2012), SoobieOut (12-08-2012), WesternStarSCR (12-07-2012)