[TR] TR3A Radiator Fan

[DAVE HOGYE]

An electric fan mounted in front of the radiator, should "push" air through the radiator.  One mounted on the engine side of the radiator "pulls".  It sounds like your pusher fan has been wired incorrectly.  It definitely shouldn't be pushing air out the grill.  
I think it is true that an electric fan is only useful in very slow driving and while at rest. 
An electric fan is all that I have on my TR3 vintage racer and it is only needed in those conditions.  It never comes on during a race.  The electric fan switch/sender is 200 degree.  I have an override switch to operate it manually when the temp rises.

DH
> On March 10, 2018 at 8:28 AM TERRY SMITH <terryrs at comcast.net> wrote:
> 
> 
> I seem to remember that the last time this came up, comment was made that an electric fan helps most when the car is at idle or close, but doesn't add much at speed.  Don't quote me, though.  You're right, it seems to me, that cruising at speed the fan would be pushing instead of pulling, which would counter the airflow coming through the grill, which would logically exacerbate the tendency already for the electric fan to somewhat impede natural airflow at speed.  
> 
> I've used the yellow blade fan for over a dozen years in my daily driver.  Been happy with it.  I've tried the modified water pump with the additional vanes but didn't notice a difference, though it might help with an engine more on the margin of overheating due to clogged water passages and whatnot.  I've rebuilt the engine twice on mine, boiling the block and head each time, so haven't really had to reach for cooling solutions.  Have an electric fan to install, but never had to bother.  
> 
> I love the name "hurricane" for a fan...:o)
> 
> Terry Smith, '59 TR3A  
> New Hampshire
> 
> 
> > On March 9, 2018 at 3:48 PM Jim Henningsen <trguy75 at gmail.com> wrote:
> > 
> > 
> > 1961 TR3A, stock motor setup, with stock radiator that includes crank hole.
> > My temp even on a 68 degree day in Florida today runs at the mark between
> > 185 and 230.  Assume 200 or a little higher?  I have a stock four blade
> > metal fan and prev owner put electric fan on front of radiator with manual
> > on/off switch under dash.  The electric fan blows the air out the grill.
> > Seems backward to me.  Doesn't help cooling either way.  Is there a
> > preference on the best alternative fan blade to use for better cooling?
> > Macy's hurricane fan?  TRF Yellow blade fan? Other?  Thanks in advance.
> > 
> > Jim Henningsen
> > Ocala, FL
> > 
> > 61 TR3A
> > 62 TR4
> > 75 TR6 (Yes my old TR6 is coming back home to papa!)
> > 
> > 
> > 
> > 
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