Bonnet Scoops

Now that is ugly.

Do they have a practical purpose? How would they go in a water crossing ?

Doug,

If the scoops are for an inter-cooler a single scoop like the Nissan one would be good.

If they are for cooling the engine bay they should face the other way so the they will act like an venturi.

Some of the early Land Cruisers, 40 Series I think, had a series of lots on the bonnet to suck the hot air out.

Raising the back of the bonnet and inch will also allow the hot air to escape.


Wayne

Doug, From what I can see, it looks like the bar will stop the airflow to the scoops anyway. The cops in WA would have a canary on that in a flash. If you go the Nissan scoop which is a much better idea, prior to fitting get a piece of heavy knitting wool about 15cm long and tape it to the bonnet and take it for a drive. This will let you know what is happening with airflow over the bonnet. Gliders use them and are known as a "yaw string"


Cheers

Mark

Doug,
I know what you mean about the battery temps under the bonnet of a Troopy.

Funny thing, when I fitted the 6.5l engine the under bonnet temps dropped.

There is a cruiser running around here with 2 Nissan bonnet scoops and it looks quite good.

There is a product called the Cell Saver that we will have in the new year. This keeps batteries cooler and reflects heat.

Regards

Derek from ABR

Here is a cheap solution, do this one and the washers under the hinges.

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=130331656824&ssPageName=STRK:MEWAX:IT

Doug

Just pop the bonnet and put a couple of dog food tins inbetween the bonnet and the grille. Hold the bonnet down with an ockey strap. Works a treat...:-)

Hullo Doug,

I saw a 100 series with a scoop from a Patrol or Hilux in Broken Hill once.

It looked really good.

I would do it, mate.

When I finally get around to it I'll add a photo, I'll have to keep them forward then re-mount my bug deflector on top of them or behind .
Thanks to all replyers .



.

I know you will say "Not the Kingswood guy again". Suffer mate.

We had the same trouble with our old car (Ha!!!) and lifted the rear of the bonnet as suggested by some above.

Worked a treat.

Not too keen on the air scoop though. Unless it has something in it to stop rain getting in. A well "filtered" one is worth considering though.

Preference though is for the siomple bonnet lift.Miles cheaper also.

Phil

Landrover defenders have a huge gap around the bonnet so "Landy's Do It Naturally".
Cheers,
Mary

I read a forum where there is an engineer who works for a well known manufacturer of aftermarket turbochargers and intercoolers and his take on these types of contraptions the supposedly feed air under the bonnet is that they generally don't work. His theory is that with air being fed through the radiator at speed and then the addition of another source of air, that this creates a 'high pressure' area under the bonnet and actually reduces the 'flow' of air through the engine bay and may lead to overheating problems. This may be especially true with the design of the front of the troopy which is tapered and thus has reduced air flow from factory in comparison to say the LC wagon etc.

From memory, the idea of creating a 'vent' at the back of the bonnet by packing the bolts is apparently a better option.

I'm no engineer, but seems to make good sense.

If you're a member, do a search of LCOOL as ther is a great deal of information on these bonnet scoops there, written by some very knowledgeable people.

Cheers,

Mark

While I agree to what people are saying about under bonnet air pressure's, I wonder what speed you have to drive to get this pressure happening.Remember we're talking 4WD's, not race cars.
I fitted a Patrol replica scoop to our 100 series after fitting a top mount I/C and also a thermo fan to the I/C, right under the scoop.Our cruiser runs cool, never has it had a heating problem, before the scoop was fitted or after.
I purchased the scoop from ebay, $60 and sikaflexed it down.[img][/img]

Doug,
I forgot to say that I have seen the left hand inner guard cut away where it joins the outer guard at the front, a deflector was then added to route air between the guard and the inner guard. The air enters the engine bay via the holes that are already there along the side where your batteries sit.

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Also Doug, the old 75 series to 1989 had a breather on the outer guard that had a pipe that lead to the battery.

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Hi Doug,

If you want to keep it legal, read this.
http://nt.gov.au/transport/mvr/vehiclestandards/infobulletins/ibv20.pdf

Cheers Tony.