Will a bonnet scoop reduce heat in the engine bay?

**Fausto79** · 26th January 2018, 02:38 PM

Originally Posted by DiscoMick

Having those on each side look like they would be very effective at venting hot air, which would lower the air pressure in the engine bay and so draw more cool air through the radiator, as I understand how this works, so they look excellent.
From what I can see, we want the cool air coming in through the radiator, not being rammed down from the top into the back of the engine bay.
I've decided to add side vents for the Defender to my wish list. Maybe these:
Grilles and Vents for Defender Inlcuding SVX - Vehicle Enhancements - Land Rover Defender (R) - Shop by Vehicle

It's like people who put solar panels on an angle on their roof rack and then wonder why there is so much wind noise and their fuel consumption rises. They've just created a wind block. The panel should be flat. Not the same issue of course, but just an example of not understanding aerodynamics, I think. Mind you, I'm just a novice at this stuff.

The angled solar panels help with traction. Seeing as landrovers are so fast, putting them on an angle increases downforce and helps corner faster and keep the car on the road when going at insane speeds.

**blackrangie** · 26th January 2018, 03:33 PM

Originally Posted by Fausto79

The angled solar panels help with traction. Seeing as landrovers are so fast, putting them on an angle increases downforce and helps corner faster and keep the car on the road when going at insane speeds.

Will a bonnet scoop reduce heat in the engine bay?

**blackrangie** · 26th January 2018, 03:35 PM

Originally Posted by DiscoMick

That does look good and the driver's side one should vent hot air and keep water out. I like it.

About the cool-looking forward facing vent shown above, it's not just river crossings that concern me, but normal driving in rain. When driving in rain wouldn't the airflow push the rain in the vent and onto the engine, possibly causing electrical issues?

The same reply as river crossings applys to rain as above

DiscoMick · 26th January 2018, 04:35 PM

But a river crossing is only a brief event whereas prolonged driving in rain would subject the electricals to sustained water pressure, making water entry more likely.

**AK83** · 26th January 2018, 09:34 PM

Originally Posted by Fausto79

The angled solar panels help with traction. Seeing as landrovers are so fast, putting them on an angle increases downforce and helps corner faster and keep the car on the road when going at insane speeds.

I'm thinking instead of roof mounted, maybe better doing it as a diffuser, mounted with hydraulic rams to adjust it according to speed.
May help keep a bit more downforce on the front to help with front end grip on those insanely fast landrovers!

And if angled just right, could help direct some cool air under the bonnet to help keep under bonnet temps in check too!

**blackrangie** · 26th January 2018, 10:30 PM

Originally Posted by DiscoMick

But a river crossing is only a brief event whereas prolonged driving in rain would subject the electricals to sustained water pressure, making water entry more likely.

Only an issue with dizzy v8s if dizzy at rear, change to coil packs if worried

**Ancient Mariner** · 27th January 2018, 10:46 AM

Discreet

**trout1105** · 27th January 2018, 12:08 PM

Originally Posted by Ancient Mariner

Discreet

Simply removing/moving the two spotlights would have more affect on the airflow than that scoop would

DiscoMick · 27th January 2018, 03:00 PM

Yeah I'm going to remove my driving lights now the lightbar has made them redundant.

**blackrangie** · 28th January 2018, 10:17 PM

Originally Posted by Ancient Mariner

Discreet

Is this your rig? Looks tuff

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