Cabin air-scoop on roof panel
Discussion
You are probably wondering what on earth I am thinking of but I had a Griff for 10 yrs and become hugely bored of taking the roof off a long time ago.
Basically, the roof is always on whatever the weather.
As such I found myself wondering yesterday as I trundled down the M1 what the feasibility would be of adding a small scoop on the lid to bring fresh air into the cabin.
There are obvious pressure issues to be considered but this would finally give a use to all the air gaps around the windows
But wondered if anyone has any experience of such a device or knows where a little bit of research can be done?
TIA
Basically, the roof is always on whatever the weather.
As such I found myself wondering yesterday as I trundled down the M1 what the feasibility would be of adding a small scoop on the lid to bring fresh air into the cabin.
There are obvious pressure issues to be considered but this would finally give a use to all the air gaps around the windows
But wondered if anyone has any experience of such a device or knows where a little bit of research can be done? TIA
Horse_Apple said:
You are probably wondering what on earth I am thinking of but I had a Griff for 10 yrs and become hugely bored of taking the roof off a long time ago.
Basically, the roof is always on whatever the weather.
.....
Next you'll be telling us you're bored with life
. Surely the roof stays off for at least 4 months of the year, could even leave it in the garage, well you can on the sunny south coast
. Harry
I do some of my finest thinking when sweating my bollocks off on the M1.
Yes, the windows do go down and normally back up (which is a nice feature and an option worth specifying when buying new
) However, The dynamics of Griffs is such that even with the windows down you get very little air coming in. Sounds daft but when you have crossed Europe repeatedly in hot weather it makes sense.
An air scoop along the top ala rally wagons would completely solve this problem and make the car far more comfortabale on long journeys and when spanking around the Ring.
I have two lids and so can butcher the older one.
The key would be how to prevent water coming in and so some form or shut-off would be needed.
I'm just 'flying a kite' at the moment but do keep the abuse coming, as I'm confident I can survive it
but some handy tips would be gratefully recieved as well. 
Horse_Apple said:
You are probably wondering what on earth I am thinking of but I had a Griff for 10 yrs and become hugely bored of taking the roof off a long time ago.
Basically, the roof is always on whatever the weather.
As such I found myself wondering yesterday as I trundled down the M1 what the feasibility would be of adding a small scoop on the lid to bring fresh air into the cabin.
There are obvious pressure issues to be considered but this would finally give a use to all the air gaps around the windows
TIA
Great minds and all that, I had a similar thought. If it was'nt to high I recon it's a good idea. i guess it would need to slope back to blend into the roof panel like some of the LeMans/GT cars
I assume you haven't got air conditioning then.
Why not see about getting it retro-fitted, the RV8 lump has the anchorage points for it on the front of the block. Keeps you happy, although most other Tiv owners will lookk at you funy to see you with the roof on on a nice summers (or sunny winters) day .
Harry
Why not see about getting it retro-fitted, the RV8 lump has the anchorage points for it on the front of the block. Keeps you happy, although most other Tiv owners will lookk at you funy to see you with the roof on on a nice summers (or sunny winters) day . Harry
HarryW said:
You are probably wondering what on earth I am thinking of but I had a Griff for 10 yrs and become hugely bored of taking the roof off a long time ago.
Basically, the roof is always on whatever the weather.
.....
Next you'll be telling us you're bored with life
Surely the roof stays off for at least 4 months of the year, could even leave it in the garage, well you can on the sunny south coast
Harry
I never bought the car for its soft top qualities. I actually have no desire to own a convertable but at the time the Griff was the finest toy available on the global market for the money.
And still isHorse_Apple said:
Yes, the windows do go down and normally back up (which is a nice feature and an option worth specifying when buying new
I'm just 'flying a kite' at the moment but do keep the abuse coming, as I'm confident I can survive it
Horse_Apple said:
However, The dynamics of Griffs is such that even with the windows down you get very little air coming in. Sounds daft but when you have crossed Europe repeatedly in hot weather it makes sense.
True but a well placed elbow on the window sill directs a lot of fresh air into the car when needed.
Horse_Apple said:
the roof is always on whatever the weather.
I think if you change that sentence to read ...
"The roof is always OFF whatever the weather."
You will have sorted the problem with becoming hugely bored of taking the roof off - as if you don't put it back on you won't have to take it off again !
markh said:
Great minds and all that, I had a similar thought. If it was'nt to high I recon it's a good idea. i guess it would need to slope back to blend into the roof panel like some of the LeMans/GT cars
Yup. The Scooby scoop kindly shown above is a shade too Max Power and I would hope that most people here would take me out and shoot me if I were to do something so offensive.
What I had in mind was a very low (1-1.5cm) scoop lieing accros the near full width of the lid. This could be either black or have the lid re-trimmed to incorporate the change.
It would need to be very subtle.
Internally, a series of drill holes would allow the air through without altering structural integrety too much.
The questions is: How to stop water coming in? Clearly the verticle face needs to have a shutter system, having it on the inside lower exit(underside of lid) would lead to water being stored and pooring in when opened.
HarryW: Aircon retrofit is an engine out job and at the last check 3 yrs ago TVR wanted £3K+ for it. Also it does not solve the problem of bringing in air which is not saturated with toxic hydrocarbons.
FourWheel: The elbow is a useful tool and will keep the right armpit dry but it really does nothing to assist in the lowering of cabin temp.
SpielBoy: Leaving the roof off has huge implications to do with people urinating in car when parked in town. Rain damaging the interior. Dirt ruining interior. Me being burnt to cr4p on the days that the sun does shine. And the fact that I prefer the roof on in general anyway.
FlipFlop: I looked at this idea but while it makes stowage more simple I still have no interest in taking the lid off the wagon, it is simply more trouble than it is worth for me.
If I wanted a convertable I would buy one of those dull cars with an electric hood. But what I want is a fantastic British sports car which costs very little to run and is a huge lump of fun. The Griff fits this bill perfectly and it is incidental to me that it is a softtop.
There is no accounting for taste and there is nowt stranger than folk
If you put the scoop on the other way round and opened the windows slightly, wouldn't the air passing over the scoop create a low(er) pressure area, thus drawing air out of the cabin?
This is how pressed-in louvres are supposed to work, right? Air passing across the bonnet creates low pressure across the mouth of the louvre, thus drawing air out from under the bonnet?
VS
This is how pressed-in louvres are supposed to work, right? Air passing across the bonnet creates low pressure across the mouth of the louvre, thus drawing air out from under the bonnet?
VS
In order to avoid the water problem, perhaps you could use the vent in the roof as an extractor instead of an inlet? Bernouilli effect stylee. Instead of having the low-profile scoop thing facing forwards, have two of them running front to back (i.e. facing out sideways) so that air flows across them when the car is going forwards, amd sucks the air out of the cabin. Open up the airvents in the footwell, and you should get some air circulation. You'd need to check there isn't a high pressure patch over the roof, but I would expect the exact opposite.
Echo???
>> Edited by ATG on Wednesday 7th July 13:08
Echo???
>> Edited by ATG on Wednesday 7th July 13:08
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