Thread: Project bonnet scoop

Originally Posted by brend0n

I've fitted a side vent.


I have no number evidence but I can tell its working cause driving along if i put my hand out in the path of the vent I can feel quite hot air coming out

Mine is the same but different. I fitted my vent into the side of the bonnet itself.

Have seen RRS vents in the sides of a P38. Looks pretty good to me. I think it would work better than a bonnet scoop. Most bonnet scoops are for getting air into the induction system not for getting air out.

.Gary

Originally Posted by brend0n

I've fitted a side vent.

very easy to do and I think looks the goods on the RRCs. (I realise this is for a P38)
I'm considering adding vent to the bonnet (similar to the ones Mick_marsh put up) to help the air con and other electrics out. however these will be towards the edges to ensure hot air doesn't go straight into the interior vent.

I have no number evidence but I can tell its working cause driving along if i put my hand out in the path of the vent I can feel quite hot air coming out

Thats exactly what I was getting at. Seems quite a common mod on Classics.
Even works as a hand warmer too.

I removed my bonnet insulation foam and hood front and side rubber channel (not the rear one near the bulk head or the bulk head foam will hang).

That helps a lot and i can see the heat coming out when it's raining and cold outside.

A friend of mine put some spacers under the hinges to lift the back of the bonnet. Works well.

But you'll have more noise.

Would this work for the Defender?


The Rover V8 puts out a fair bit of heat, and once the hot air is up under the bonnet, it has nowhere to go.

I've seen some Defender bonnets with a set of holes on the rear / side portion of the Defender bonnet, probably cut using a 50mm hole saw.
Or would a set of rear-facing louvers/slats work?

Looking to put some side vent into my RRC too.

Apparently cutting them into the bonnet will lead to rust.
Better to fit them in the ally panel behind the bonnet.


Here's an interesting concept:
http://www.landroversonly.com/forums...classic-32899/

Yes louvers in rear of bonnet would work. Just as lifting the rear of the bonnet also. Something we all did on our hot Holdens & Falcons 30 + years ago. So nothing new there. Didn't do much for the air coming into the cab tho. Its was like a furnace. Hot Dam Hot

Gary

There is a modified black p38 "expedition style" on ebay UK last week or so that has similar vent to GlenHendry's suggested one mounted rear facing that looked quite nice. Not sure about escaping air going into cabin vents under plenum though. Not qualified in aerodynamics but am certain about that low pressure area at base of windscreen drawing air out at speed.

Have also been thinking about removing rubber seal from rear of under bonnet along with those foam bits on the rear outer sides that wrap around the bonnet struts. Again, not sure about hot air being directed into cabin plenum vents... especially in summer when you would want it out of under bonnet most but in cab least. So may just try taking the foam side bits out in hotter times.

I like the idea of having GlenHendry's one rear facing and shut-able... but also like the other vent style ones from Ipswich mounted to the rear outer top sides of the bonnet. In saying all that, I also like the idea of getting my thermo fans pushing air through the radiator whenever the car is stationary or at slower than approx. 40km/h.

As with anything P38... decisions, decisions, decisions!

FANTASTIC someone is having a crack though! Good onya Glen.