Mike -
I had the exact same experience with a pusher fan 10 years ago - took it out
and noticed immediate improvement in cooling. Went with the Nock's metal
hayden type fan and have never had a problem since.
The problem with the electric pushers is they put the pancake motor right in
the middle of the radiator, and right in the middle of the air stream on our
healeys. I've never understood why they haven't been able to use a narrower
longer motor rather than these stupid fat pancake motors... but then again a
more normal motor would probably add to clearance problems as these are
universal application products.
One option I have considered is to mount up late model ('78-'80) US spec MGB
pusher fans - these have the flexibility of mounting out of the primary air
flow on the radiator and with their more traditional motor design, should
not cut off that much air flow. Also, I think the CFM on these fans are
quite good because of the big traditional motor they use.
Glad to see you got everything sorted.
Alan
'52 A90
'53 BN1
'64 BJ8
On 6/19/07, M Lempert <mlempert@bellsouth.net> wrote:
>
> It got through ! Must have been too long.
>
> Cooling Update, Part Two. The Solution...
>
> Fired it up and took a drive. While it was only 80 degrees that day, ten
> less than the trouble day, all was well. In fact, the temperature was
> barely
> hitting the 160 mark. After some spirited driving, partly to listen for
> horrible noises that might indicate a problem with the fan, I pulled into
> the driveway and let it idle for several minutes - at least the duration
> of
> four or five stop lights. The temperature rose, but didn't get much above
> the 180 mark. I'm pretty happy with that as its better than it's ever
> been.
>
> In conclusion, I believe the timing did contribute to operating
> temperature
> and I would have liked to know how much, but oh well. I believe the
> pusher
> fan impeded air flow and was more of a problem at speed than help at idle.
> The big new fan no doubt draws more air through this thicker radiator at
> idle and this I believe makes a big difference. However, I would
> recommend
> the smaller flex fan for most people and recognize that cutting down the
> diameter of a fan risks balance issues and more - don't try this at home
> yourselves folks.
>
> The one last thing I will do before hitting the long road to Conclave is
> add
> some water wetter as added insurance. I hope to leave Charleston on
> Wednesday or Thursday at the latest. As much as I hate it, I'll probably
> be
> taking route 95 all the way north. I'll break in Jersey for a couple of
> days
> before the second leg to Vermont. Anyone else traveling that route ?
> There's safety in numbers.
>
> Regards,
> Mike Lempert
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