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The electric fans are variable speed. The engine driven fan has a viscous clutch. This engine should never run hot - my viscous clutch was not engaging last summer and even in the Florida heat it never topped 100*C. After about a year of freewheeling, the clutch eventually seized and started spitting out its bearings.
The smoking aklim referred to at the beginning of this thread is from overfueling at low RPM, and it disappears once the boost comes on about 2000 RPM. Lightman has had one of these chips in his car for about a year, and he also mentioned that it smokes like a freight train if you floor the accelerator from a dead stop. IMHO, a little smoke is a small price to pay in return for performance when you want it. I plan on getting a chip soon.
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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References
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