Quote:
Originally Posted by martureo
It's going to be a pusher. There just isn't any room for a puller.
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I am testing an upgraded pusher fan (16" dia. from a 560 SEL) on my 85 300D as the only fan for both AC condenser and engine radiator cooling. I added a temporary test shroud made from cardboard in front of the condenser and with that, it is keeping the coolant temp gauge within reasonable numbers (85 to 90 C) with ambients up to 85F. I am waiting for hotter days to come to see how it performs in 90F and above ambient.
I have the stock 65A alternator. At idle and the aux fan and blower running, charge voltage is 12.5 V, i.e. = not charging. Once I start driving , charge voltage goes up to 13V, i.e. charging although lower than the 13.4 V if both fans were off. If the car is idling in city traffic most of the time with the AC on, the battery may run down, otherwise it may be just fine.
I may try modifying the regulator to get a higher charge current at idle, or upgrade the alternator to a 115A unit, if tests shows that it is necessary. Or leave the 65A unit, if tests shows it is sufficient.