Thread: Bonnet Scoop Advice

Fair point. The slope of the windscreen prob forced the air upwards from the last 1/3.

Not sure if you’ve helped or hindered my question tho!

It's confusing, but from what I can figure, for the radiator to function at peak, the air pressure behind the radiator should be lower than in front, so air is sucked through the radiator to try to equalise the flow.
Adding a front facing bonnet scoop might force air behind the radiator, raise the air pressure there and reduce the flow through the radiator.
To lower the pressure behind the radiator, a rear-facing scoop might vent air and lower the air pressure, increasing radiator flow.
This is counter-intuitive, so it's hard to take in. Have fun working this one out.

Originally Posted by DiscoMick

It's confusing, but from what I can figure, for the radiator to function at peak, the air pressure behind the radiator should be lower than in front, so air is sucked through the radiator to try to equalise the flow.
Adding a front facing bonnet scoop might force air behind the radiator, raise the air pressure there and reduce the flow through the radiator.
To lower the pressure behind the radiator, a rear-facing scoop might vent air and lower the air pressure, increasing radiator flow.
This is counter-intuitive, so it's hard to take in. Have fun working this one out.

So, Mick, that's what you have done on your Defender. And it works?

Just ceramic coat the exhaust manifold and turbo

Yeah, that’s where I’m thinking also. Turbo also? Haven’t heard that before

Originally Posted by Mick_Marsh

So, Mick, that's what you have done on your Defender. And it works?

No, I'm leaving mine alone. Only thing I might do is remove the driving lights, which the light bar has made redundant, to increase airflow.

so when money is no object,, and you want cooling,,


an original GT40--

Wonder if the water pools in the black one