colindavies898@btinternet.com Posted July 7, 2020 Share Posted July 7, 2020 The output from the original motor seems very poor. Has anyone managed to increase to power of the original or managed to replace it with something more powerful? Any suggestions or ideas should be appreciated, thank you. Colin. Quote Link to comment Share on other sites More sharing options...
sparky_spit Posted July 8, 2020 Share Posted July 8, 2020 I've fitted a heater fan motor from a Smart Car (in this case it was a Smart Fortwo) and it fitted my Mk 3 Spitfire with a few modifications. The motor's mounting flange needs trimming so that it fits in place on the heater box and your original fan is reused with the motor spindle hole drilled out to suit the new motor's shaft. Also, the motor needs spacing out an inch or thereabouts from the heater case; I used longer bolts and short lengths of metal tubing. It's easy to do and the motor is really powerful; much more so than the original fan's Gnat's fart power. I also fitted an eBay sourced Chinese 12volt variable power controller, which cost me about £2.50 including shipping. This made it a really worthwhile modification and it all works very well; demisting now takes seconds rather than minutes. Quote Link to comment Share on other sites More sharing options...
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