Originally posted by dave_r
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Higher ambient = higher intake temp + less cooling from intercooler = hotter charge air = less boost before detonation!
My runs at 16deg felt noticeably faster than my runs at 24deg (the numbers confirmed it too). Adding 5% weight (1pax) also makes a difference, less so in the Golf than the Lotus though, where 1pax is 10% or more weight increase!
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