Mark,
My experience has been the opposite.
My stock 260 ran hot, too hot for idling in Atlanta
traffic.
The replacement 289 building ~270 rear wheel
horsepower will idle forever in 100 degree Atlanta
traffic without going over 200 degrees.
The suggestions in the United article Do work.
I forgot to add that I also installed a smaller
pully along with horn hole blocks and a pusher
fan, with a recored stock radiator.
Allan
Mk1a
Sent from my iPhone
On Mar 21, 2012, at 1:31 PM, CoolVT@aol.com wrote:
> Allan,
> With a stock engine I think the problem is much easier solved. Double the
HP and it doubles the trouble.....it seems.
> Mark
>
> In a message dated 3/21/2012 1:02:25 P.M. Eastern Daylight Time,
aballard@ix.netcom.com writes:
> 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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