Patrol bonnet scoop?

G'Day ACDC,

Mine has a seal between the scoop and the intercooler, don't know if much air gets out. Not much going either way at the moment

Regards

Rolande

How can the air pressure be greater under the bonnet than on the outside,especially if you are driving?.I would have thought that it would be lower due to a vortex effect seeing it is basically enclosed on all sides except the bottom. thus any opening like an air scoop would be exactly that - an air scoop designed to direct the air over the inter cooler

G'day,
I'm a bloke whose fitted a 3L scoop to my 2000 model 4.2 TD (non-intercooled). I fitted it on the opposite side to normal in the belief that it might direct air over the turbo and help keep motor cooler. I did that on New Years Day 2004. I initialled tried it fitted reverse as I'd read that it would help "extract" hot air from the engine bay, up onto the windscreen. That didn't help the coolant temp, so I've since turned it around to face forwards. At one stage I attached some cotton to the fin in the hole of the scoop and (from memory), it did blow outwards as much as it "sucked" inwards....this was with the forward facing aspect.

It's still on there, but if I knew then what I know now, I wouldn't have bothered fitting it.

The Patrols do have a plastic "air dam" under/behind the radiator, angled back/down at about 45 degrees. The sole purpose of this is to cause a vacuum effect within the engine bay to draw hot air out through the bottom of the engine. I would imagine that that the intercooler, being sealed by a rubber fitting on the 3L, would have a positive air flow through the scoop and air would be drawn through and downwards.

Just my observations.

Cheers

Roachie

I have two things to say.

1. When driving at 100 kilometres per hour, stick your head out the window and tell me if you recon air wouldn't be rushing in throught the scoop on the bonnet. When travelling a low speeds the scoop does may not work, but I recon it would at highway speeds.

2. If infact what you say is true, why is the patrol engine puting out more pony's compared to the navara, which has the same motor but doesn't have the intercooler?

2" bodylift and a 10" Davies Craig fan on top of the intercooler and a switch on the dash.

Must be some pressure at Hwy speeds as the air would not enter the pulman tube to the heater air con etc.
Roachie' your idea with the scoop not so good eh, I was about to go down that lane with my 4.2td.

BUGGER wanted an easy fix.