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Eclat fan throughput increases on overrun? - Engine & Ancilliaries/Gearbox - The Lotus Forums #ForTheOwners Jump to content

Eclat fan throughput increases on overrun?

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Here's one for you. My 1979 Eclat 521 never had a great throughput from the fan but it's pretty low now, but that's not the purpose of the post. The throughput definitely increases on the overrun, if I'm cruising on a dual carriageway, barely a breath, but almost the second I lift off for an exit, there's a detectable increase in air from the vents.....what's that all about?

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Hmmm.  I think the vents are vacuum operated so, if there is a leak on the system, they may be closing as the vacuum drops and, with the increase in vacuum on the overrun, opening up again and allowing more air through.

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S4 Elan, Elan +2S, Federal-spec, World Championship Edition S2 Esprit #42, S1 Elise, Excel SE


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