Sitec's 101..

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Originally Posted by Sitec

With Melrose and the trip to whoop whoop afterwards, I thought I'd do something to combat the dust in the rear load area issue when traveling on dirt roads. The idea was to supply the cab with a guts full of air in the hopes to pressurise the whole cab. Here's a pic of what I thought would work. Two roof flaps for floats purchased and fitted to the outside if the vehicle. Fantastic idea I hear some of you say.. Well, its not! Due to the brick like front end on all 101's, when traveling in a forward direction, the air hits the flat face and does a 90deg turn and flow a straight around the side, missing these flaps all together!! Just contemplating my next move. I originally planned to fit them in the engine cooling tunnel, but didn't want to steal precious air from the rad and intercooler.

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You need to relocate the vents or to place a deflector to catch some of that air flowing at 90 degrees at the front corner. Some station wagons used to have such a deflector to force air going along the roof to deflect down and keep dust and water off the back window.

I've ridden in one with similar vents on the inside of the tunnel, worked really well.
I hear you, regarding radiator air flow though, I've envisaged a scoop, full height of the rad opening each side but only 20mm wide, with some sort of filter on the inside. A similar plan for heater/air con fresh air intake....
All a long way off though, will probably change my plans by the time I get to it.

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Originally Posted by slug_burner

You need to relocate the vents or to place a deflector to catch some of that air flowing at 90 degrees at the front corner. Some station wagons used to have such a deflector to force air going along the roof to deflect down and keep dust and water off the back window.

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Looking at that now. Over skinning the vent with two pieces of alli sheet that follow around the corner... A bit like some trucks.

The site called roverworx is no longer on the internet.
A fellow in the USA tried large two way air scoops on the side of the front body and on the top of a metal cabin.
His side scoops were in the same spot as the ones as Sitecs and they didn't work.
He later tried to make good the side scoops by adding a alloy plate over the top of the scoops he fitted so they reached out further.......only small improvement.
To solve the problem he ended up running a duct to the front edge of the cabin body along the sides......it worked but was very large and ugly.
In a nut shell the flat front of a 101 causes a bow wave which uses much fuel above 80 kph and pushes the air flow well away from the sides and top of the cabin.
The fellow in the USA did alot of work with tuffs of string ect to study the flow of air around the cabin of a 101 after he cut the metal for the side vents and found they didn't work.
Air vents in the fan tunnel will not work as well as one ones on the front face of the cabin.
The front face of the cabin is max air pressure when driving.......the fan tunnel loses air pressure though the engine bay when driving.
In a soft top air pressure inside the cabin drops with speed especially if the drivers and passengers door windows are slid open and the reason why you need a flume curtain fitted to a soft top to stop the exhaust killing you.
Maximum pressure difference of all these effects is the front cabin panel centring near the lower dash panel.
My vents are not very big at all and are very,very effective at high and low speeds.
They are kicked open and closed by your feet.
They look factory.
The other good part about the location is the way the air gets to the driver and passenger.
The air flow follows the floor and seat etc up to your face ect.
The private parts get cooled first and then the rest of you.
On a really hot days the 101 is not much fun to drive.....but if moving along at 40 kph or more I would rather drive the 101 than stand beside it stationary with my vents.
Of all the mods you can do to a 101 my vent mods is cheap and simple and works better than expected.
The thing is being trying to tell my fellow 101ers the benefits.
Only Bacicat and Garrycol have driven my 101 with the vents in operation and taken interest....both were impressed.
Only heavy rain seems to come in the vents and yes dust will too.............if it is a problem, I just close them or lead the front of the pack.
Ron

Not an issue we have over here... were normally trying to fix the drafts...
but those front vents could be mounted on their side infront of the rad and when open they would scoop the air into the cab then and invisible from the outside

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Originally Posted by nrs91

Not an issue we have over here... were normally trying to fix the drafts...
but those front vents could be mounted on their side infront of the rad and when open they would scoop the air into the cab then and invisible from the outside

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That was my original plan, but I was worried about taking too much air from in front of the rad.. especially on a 40 deg day.
They have however been modified.. And they do now work.... Picture to flow this eve! :D

I'll get to see them in person. :)

I think ur a bit horny today at melrose. I kept looking for the train...lol

Sent from my GT-P5110 using AULRO mobile app

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Originally Posted by Sitec

Picture to flow this eve! :D

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How long after "this eve"? :p

Its a very wet morning here at Melrose, and its also the first time I've been able to access Internet.. Telstra are that useless up here!! When the rain stops and we r out, I'll take a pic. Clean forgot!! As for the horns.. I think Ian Turner really likes them!!! ;)