Open the engine lid or let the fans kick in?
08-02-2012, 01:25 PM
#47
I currently open the lid after driving because the fan goes off after I turn off the car. How long does it take for the fan to come back on, because I haven't noticed the fan coming on by itself when I go somewhere and I have to leave the lid closed. Makes sense that the compartment would bake with no ventilation at all.
08-02-2012, 02:54 PM
#48
Race Director
then you have to turn it of, move the fan, and shut the engine compartment.
What do you guys do when you have to park the car somewhere other than your house? do you bring a really long extension cord with you and plug it into the grocery store outlets for your external fan?
What do you guys do when you have to park the car somewhere other than your house? do you bring a really long extension cord with you and plug it into the grocery store outlets for your external fan?
08-02-2012, 02:59 PM
#49
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then you have to turn it of, move the fan, and shut the engine compartment.
What do you guys do when you have to park the car somewhere other than your house? do you bring a really long extension cord with you and plug it into the grocery store outlets for your external fan?
What do you guys do when you have to park the car somewhere other than your house? do you bring a really long extension cord with you and plug it into the grocery store outlets for your external fan?
Fan stays.
Yes, I close the lid.
On my 310 miles weekend sprints. I stop about 4 times. Starbucks, 2 bathroom breaks, and a burger at Culvers in Janesville, WI. Less than 30 minutes total. If I could find a place to plug-in, I'd consider bringing the fan.
The temps on the 993 drop like a rock (as you have noted in the past). No engine tray and no mufflers helps this a ton.
The Boxster takes forever to cool down, as expected.
08-02-2012, 03:42 PM
#50
Drifting
Just consider that it may also be a problem if the engine and surrounding parts cool down too quickly.
Things cooling slowly lets them all resize and change shape at a gradual pace, with the stresses dissipating gradually as the parts cool. If you cool it very quickly, you may have excess stresses on some components that would possibly lead to premature failure or cracking.
Cooling too quickly can be worse than letting it cool at the designed rate.
Things cooling slowly lets them all resize and change shape at a gradual pace, with the stresses dissipating gradually as the parts cool. If you cool it very quickly, you may have excess stresses on some components that would possibly lead to premature failure or cracking.
Cooling too quickly can be worse than letting it cool at the designed rate.
08-02-2012, 03:49 PM
#51
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Just consider that it may also be a problem if the engine and surrounding parts cool down too quickly.
Things cooling slowly lets them all resize and change shape at a gradual pace, with the stresses dissipating gradually as the parts cool. If you cool it very quickly, you may have excess stresses on some components that would possibly lead to premature failure or cracking.
Cooling too quickly can be worse than letting it cool at the designed rate.
Things cooling slowly lets them all resize and change shape at a gradual pace, with the stresses dissipating gradually as the parts cool. If you cool it very quickly, you may have excess stresses on some components that would possibly lead to premature failure or cracking.
Cooling too quickly can be worse than letting it cool at the designed rate.
When I first park, I can barely touch (rubber gloves) the turbo's oil sump tanks. Easy to reach under and test. They are very-very hot. After about 2 hours, they are warm to cool.
08-02-2012, 04:22 PM
#52
Rennlist Member
I didn't miss it - I thought it was his opinion (educated it may be) - it still makes more sense to me for the hot air to exit into an open area above the car and not be pushed onto the garage floor where it would radiate back up into the engine...even then I wonder about how much airflow that little fan generates and how it pushes the air through the maze of wires and plumbing.
08-02-2012, 06:45 PM
#56
So, do we need to install intake louvers and exhaust fans in our garages as well?
How many air exchanges per hour? Four or less?
Average 2 car garage has volume of about 10,000 cu. ft. @ four air exchanges per hour, that gives me about 40,000 std. cu. ft per hour that is 666 std. cu. ft per minute and that should be about how many HP exhaust fan motor?
Well, just leave the garage door open overnight and hope for some wind, I guess….
Can we talk about IMS or RMS instead, please?
How many air exchanges per hour? Four or less?
Average 2 car garage has volume of about 10,000 cu. ft. @ four air exchanges per hour, that gives me about 40,000 std. cu. ft per hour that is 666 std. cu. ft per minute and that should be about how many HP exhaust fan motor?
Well, just leave the garage door open overnight and hope for some wind, I guess….
Can we talk about IMS or RMS instead, please?
08-02-2012, 07:25 PM
#57
Rennlist Member
Yellow cab drivers in Chicago pop the lid over their engines when they get hot.
-just sayin
-just sayin
08-02-2012, 07:37 PM
#58
Nordschleife Master
08-02-2012, 07:42 PM
#59
