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Discussion Starter · #1 ·
Installed Evosport Pulley set, thanks to a board member and installed custom electrical fan using bmw oem parts..
 

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Nice! Do tell... what is the story behind the electric fan. :dunno:
 

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Discussion Starter · #3 ·
Modified e39 fam srout, BMW 335 turbo fan, modified electrical plug was a bit modified. Original fan clutch in the trash. Took about 5 hours to make the fan fit perfect.
 

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I've seen references to new pulley sets, but am not sure what they do to improve the performance of the engine. Can someone enlighten me?


under or over-driven accessories, and lighter weight assemblies (sometimes). most of which reduce parasitic drag on the engine.
 
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