Subject: Re: Good gosh, thats a sexy fan! by BillH on 2011/3/16 17:17:04
Quote:
Ultraman wrote: So in the older cars were the belt ran the fan the fan would always run but it would kick on when the temp got over 180 if that was where the thermostate opened. My assumption in the old days was the thermostate opens at 180 then the car would work to maintain that 180 temp. No computers back then so what told the fan to kick in or just freewheel as the work load on the engine changed.
The fans and thermostat are still a big part of the equation but the computer tells the fan when to run and when not to and for how long, right? The thermostat opens at 180 or 195 and the fan would have to be set to maintain that temp is what you guys are saying.
In the 50's, the belt driven fans ran all the time, in the mid 60's thermal clutches were put on the fans, they free wheeled until reaching a set temp then kicked in fully.
The ONLY purpose of the thermostat is to warm up the motor faster. The 180/195 temp is best for emmissions and motor wear.
Today's fans are set to come on when the temps get too hot, not to maintain a temp on the road.
