NaFe Posted 27March, 2014 Report Share Posted 27March, 2014 Hi Guys, As i'm not close to mine for quite a while (working away) I wonder if anyone could tell me what the diameter of the crankshaft pulley is. I'm looking at buying a clewett Engineering crank trigger kit and they sell two diameters - a 116mm and 127mm. Any ideas what years these refer to? Cheers, NaFe Link to comment Share on other sites More sharing options...
Russ Posted 27March, 2014 Report Share Posted 27March, 2014 according to the Porsche PET catalogue there are quite a few different options for 81 SC pulleys: http://www.porsche.com/all/media/pdf/originalparts/en/E_911_83_KATALOG.pdf and then this thread has different measurements to the ones you have above.. http://forums.pelicanparts.com/porsche-911-technical-forum/436255-crankshaft-pully-coolinf-fan-pully-half-questions.html#post4246618 might have to resort to getting someone to measure it? Link to comment Share on other sites More sharing options...
NaFe Posted 2April, 2014 Author Report Share Posted 2April, 2014 I will wait until I can get someone to measure it for me. Would it not be best to just go for the larger pulley anyway as this will give me me maximum fan speed for cooling. Link to comment Share on other sites More sharing options...
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