First off I would not use a TR7 fan as the mounting holes are too far apart to
be easily converted. There is a red 13 blade TR6 fan
that you can use or the Yellow TR4A fan which is readily available from the big
three. I used a yellow fan on my TR4 and am very
happy. The temp will just touch 190 stopped in traffic on a plus 90 degree day.
The trick for me was the swapping of the stock TR4 fan extension for a TR3 one.
The TR3 extension is about 3/4" shorter which allows
the new plastic fan to be mounted in it's normal orientation. Without it you
have to mount the fan backwards to have enough free
space between the blades and the back of the radiator.
Edward Hamer
Petaluma CA
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