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Dec 12, 2013 7:49 pm
Dec 12, 2013 7:49 pm
Subject: Re: Water Pump Modification
Andy Chapman would stress that the only proper way in for air is through the radiator aperture, so the slats are for air exit, aided by the low pressure areas in the front wheel arches. Air in through the unsealed bonnet allows turbulence or static under-bonnet air which as Ray says causes heat soak; from practical experience heat soak is reduced if the bonnet is "up" on its first catch where flow is aided by the low pressure region at the base of the front windscreen, which suggests that the bonnet seal might be usefully omitted in this area. That said there is a slight lip on the underside of the bonnet here which might disable the flow when the bonnet is fully closed. It's for these reasons that I'm sceptical about the effectiveness of the additional bonnet air inlet scoops fitted to the Australian car 110
Andy Chapman would stress that the only proper way in for air is through the radiator aperture, so the slats are for air exit, aided by the low pressure areas in the front wheel arches. Air in through the unsealed bonnet allows turbulence or static under-bonnet air which as Ray says causes heat soak; from practical experience heat soak is reduced if the bonnet is "up" on its first catch where flow is aided by the low pressure region at the base of the front windscreen, which suggests that the bonnet seal might be usefully omitted in this area. That said there is a slight lip on the underside of the bonnet here which might disable the flow when the bonnet is fully closed. It's for these reasons that I'm sceptical about the effectiveness of the additional bonnet air inlet scoops fitted to the Australian car 110