I have a 1991 Mercedes 190e that has 2 electric fans on the front and a mechanical (w/clutch). I noticed that only one is used for the A/C and the other kicks on when the temp gets up around 90C (typical seems to be about 82C).
Have you noticed any improvements? I was thinking about removing my mechanical fan and doing a similar mod using one or both of the electrics.
McIntyre's First Law: "Under the right circumstances, anything I tell you may be wrong."
O'Brien's First Corollary to McIntyre's First Law: "I don't know what the right circumstances are, either."
Yeah, I did the mod but I screwed up my testing. I was so eager to get it installed that I didn't do a proper before and after. It seems like I gained an mpg or two. I do mostly low speed city driving. My truck does warm up faster though.
Ooops...don't mean to step on the original thread...my 'title' didn't really say it correctly. :-)
Have you seen any improvements?? I was thinking of doing much the same. Does anyone have a good rule of thumb for the amount of power consumed by a mechanical fan?
Not yet....To early to tell.
2 big side effects for me so far.
#1 is power! I can feel it. Didn't think I could and it's not much but on a engine with 70hp to start off with I can feel it.
#2 is how much quieter the engine is. No fan spinning all the time to make a huge whooshing sound.
So far I love this mod.
Super easy to do.
Not sure how much power the fan drains, but since my t-stat is 180 and the fan doesn't even kick on to 185 it hardly runs. Even in hot heavy traffic after 5 minutes the t-stat opened and the temp dropped before the fan kicked. So it rarely is used. When I tested it after the install it only took 2 minutes to get the temp down to the 165 kick off temp. This is in 88 degree 100% humidty in New Orleans.
yup i did this to my s-10 and what a difference in power(not much but noticeable) and it makes it alot quieter. also increased the throttle response. ive noticed its given my truck a good 2 mpg improvement. in the winter my efan never really kicked on cuz of the moving air thru the radiator kept it cool enough. at highway speeds if your car gets enough moving air thru the radiator you dont need a fan at all.