Theo,
I agree with directing the flow through the radiator and blocking the
proper areas. I have done everything that you've done in that area.
In regards to the type/material of the radiator. I was at a show recently
where a radiator supplier (all aluminum models) had about 100 rads on
display. Most were ready made for certain cars. I was impressed because the
prices looked awfully good. He said they could make up any configuration
that someone would want. I asked how much more efficient aluminum would be
over brass for the same size. He said about 25%. I said that I thought the
brass would be a better conductor or heat and therefore more efficient. He
said "no". He said you put your hand on a brass radiator after a hard run
with a car and you'll burn your hand. Do the same with an aluminum and it
will feel cool. This, in his mind, was saying that since the al. felt cooler
that it was dissipating heat better than the brass. I came to the
conclusion that he was probably not someone i would want designing a radiator
for
a Tiger.
Mark
In a message dated 3/21/2012 12:43:10 P.M. Eastern Daylight Time,
Theo.Smit@dynastream.com writes:
Hi Mark,
I donbt think that there are any quick cooling aids for the Tiger b all
of them require attention to detail to get more than just a marginal
benefit.
The Cressida fan is about 12b 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 arenbt 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 theybre used in a pusher application they really donbt move anywhere
near the air that theybre 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. Youbd 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 youbre moving is really going through the rad rather than
around it, and that itbs 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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