After reading the tech articles, I added a pusher fan and horn hole blocking
plates.
The radiator was recored to stock specifications.
The PO had added a 6 blade water pump fan.
Now my Tiger will idle for an hour or more in 100 degree Atlanta heat without
going over 200 degrees.
I will also seal the bottom of the shroud this summer which should help a few
degrees.
Allan Ballard
Mk1a
Sent from my iPhone
On Mar 21, 2012, at 12:42 PM, "Smit, Theo" <Theo.Smit@dynastream.com> wrote:
> Hi Mark,
> I don't think that there are any quick cooling aids for the Tiger - all of
> them require attention to detail to get more than just a marginal benefit.
>
> The Cressida fan is about 12" diameter and has an integrated steel shroud;
it
> just barely fits below the sheetmetal in the nose. I used foam adhesive
tape
> to seal the gap between the rad matrix and the shroud. The problem you
always
> have with pusher fans is that the motor obscures some of the available area;
a
> second thing is that if the gaps aren't filled, then the air can just go
out
> the side rather than through the radiator. The reason why I used this fan
is
> that it was evidently designed from the outset as a pusher application. A
lot
> of aftermarket fans are designed as a puller, and then when they're used in
a
> pusher application they really don't move anywhere near the air that
they're
> supposedly rated at.
>
> The only thing that would be nice is to have a similar fan, but larger, so
> that it would move more air over more of the radiator. You'd end up with
part
> of the fan output deadheading against the lower radiator support though.
>
> Moving air through half the rad should be more than sufficient, since the
fan
> is only required to boost airflow at low speeds. You just have to make sure
> that the air you're moving is really going through the rad rather than
around
> it, and that it's moving with sufficient speed.
> A secondary issue is that if the fan only covers part of the radiator core,
> are those core tubes actually flowing enough coolant to do the job?
>
> Theo
>
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