Whats best valance or splitter?

[Peter Empson]

Thanks Alan, that's just what I wanted to hear.
Good luck with the install.
best regards,
Peter

 

[cococola]

Had my rear splitter painted and fitted yesterday by a company called Bodywork Solihull who were very helpfull and did a great job.I would reccomend to anyone who needs paintwork.Pictures to follow[]

 

[DivineE]

pics please!!![]

 

[sawood12]

Yes, pics please! also have you got a link to the ebay site you got it from?

 

[cococola]

I have some new pictures of my rear splitter and tried to upload them but I get the message that the image is too large,can anyone please help?[8|]
There is a splitter still for sale from the same link on ebay item number 033120076189033

 

[Suffolk944]

Cococola - do you have photoshop on your pc ? - it often comes free with the machine. If so you can use it to crop the pic until its small enough to be uploaded. Its what I had to do when I posted pics of my 944 here - hadn't ever tried using it previously but its a doddle.

If not then putting the pix on something like photobucket may be the only answer and linking them to here. Never tried that but others here seem to have done.

 

[cococola]

I have kodak easyshare and have just cropped the pictures,when I upload it still says file too large[8|]

 

[Suffolk944]

Hmm does it say how many pixels by length and breadth the cropped pix are plus the total file size ? Can't recall what the dimension limits are off hand for uploading. Took me a few attempts to get the pix the right size.

 

[cococola]

It says 1624x1084 pixcels.

 

[Mark_Bennett]

It seems to be the filesize that is the limit - the post picture dialogue says Max. 9,999KB


By the way, 1624x1084 pixels is massive for a computer screen - many people will have a much smaller resoloution screen - try 1024 x 768 as a max for pictures (not the originals, just resize a copy for posting)

 

[Diver944]

The max size for a pic on here is 200kb

800x600 or 640x480 will be fine for a forum and should be well under 200kb

 

[Mark_Bennett]

Paul, that's what ~I thought - but mine says otherwise.... must be a bug...

 

[924nutter]

ORIGINAL: sawood12

I'm a bit sceptical of the aerodynamic claims of the turbo/S2 under bumber 'spoiler'. For one there is a thumping great spare wheel well and a big exhaust back-box that blocks the airflow to the majority of the spoiler so if it did have any aerodynamic properties they would be rendered useless. Not to mention the turbulent airflow from under the car that would prevent any downforce being extracted from it. All the apendages on F1 cars are only there to smooth the turbulent airflow to make the rear wings more effective so you can imagine how useless the turbo S2 rear spoiler would be sat just behind the wheel well and back box. I think the rear spoiler is for asthetic purposes only so if you have a dedicated track car you would probably be better not having one at all and save the weight and drag. I can't imagine Porsche spent much time in wind tunnels developing the spoiler and paying much attention to the airflow under the car!

I have seen photo's somewhere for a proper rear diffuser but it was so low (as it would have to be to make it effective) that it wouldn't be suitable for the road.

Erm, phone call from a Mr Adrian Newey. Can I shave millions of my aero budget by chucking away all my diffusers then? []
I always though the diffuser speeded up the airflow underneath the car. Based on Bernouilly's theory that increased air speed reslults in a reduction of pressure, the car is sucked on to the road. It is why carburettors and aeroplane wings work.
Re: 924/944 tailgate spoilers, I had the rotten luck for a tailgate to come open while cracking along, and it popped open a good 20 mm. Once stopped, it was interesting to note that the tailgate only opened by another 6mm so I reckon, IMHO that it is more a case of preventing lift being generated, rather than adding any signifcant amonuts of downforce. After all, if it was doing much then the tailgate shouldn't have opened much in the first place should it?

 

[924nutter]

So how does the toast rack work then? Do you put two bits of bread either side of the exhaust and bung in a couple of hot laps? []
So handy, and you can hold up to seven slices the otherside.[]

 

[John Sims]

ORIGINAL: sawood12

..... I can't imagine Porsche spent much time in wind tunnels developing the spoiler and paying much attention to the airflow under the car!....

IMHO there seems to be too much attention under the car, with plastic panels and the like, to assume Porsche had done nothing.

While I prefer the look of the toast rack I am not sufficiently confident that the Turbo rear does nothing to swap.

Diffusers do enough that we had them banned in kit car racing.

 

[cococola]

Still having no joy shrinking my pictures to display a before and after of my splitter.Is it possible to email to anybody who may be able to shrink and send back to me so that I can show them please?[8|]

 

[Diver944]

ORIGINAL: cococola

Still having no joy shrinking my pictures to display a before and after of my splitter.Is it possible to email to anybody who may be able to shrink and send back to me so that I can show them please?[8|]

Email sent

 

[cococola]

Thanks Paul I have emailed pics just now.
Alan

 

[sawood12]

ORIGINAL: 924nutter

ORIGINAL: sawood12

I'm a bit sceptical of the aerodynamic claims of the turbo/S2 under bumber 'spoiler'. For one there is a thumping great spare wheel well and a big exhaust back-box that blocks the airflow to the majority of the spoiler so if it did have any aerodynamic properties they would be rendered useless. Not to mention the turbulent airflow from under the car that would prevent any downforce being extracted from it. All the apendages on F1 cars are only there to smooth the turbulent airflow to make the rear wings more effective so you can imagine how useless the turbo S2 rear spoiler would be sat just behind the wheel well and back box. I think the rear spoiler is for asthetic purposes only so if you have a dedicated track car you would probably be better not having one at all and save the weight and drag. I can't imagine Porsche spent much time in wind tunnels developing the spoiler and paying much attention to the airflow under the car!

I have seen photo's somewhere for a proper rear diffuser but it was so low (as it would have to be to make it effective) that it wouldn't be suitable for the road.

Erm, phone call from a Mr Adrian Newey. Can I shave millions of my aero budget by chucking away all my diffusers then? []
I always though the diffuser speeded up the airflow underneath the car. Based on Bernouilly's theory that increased air speed reslults in a reduction of pressure, the car is sucked on to the road. It is why carburettors and aeroplane wings work.
Re: 924/944 tailgate spoilers, I had the rotten luck for a tailgate to come open while cracking along, and it popped open a good 20 mm. Once stopped, it was interesting to note that the tailgate only opened by another 6mm so I reckon, IMHO that it is more a case of preventing lift being generated, rather than adding any signifcant amonuts of downforce. After all, if it was doing much then the tailgate shouldn't have opened much in the first place should it?

You are absolutely spot on. But Bernouli's theory assumes smooth and laminar airflow, so in order for these aerodynamic devices to work at all they absolutley require smooth laminar airflow over their surfaces. My observation is that with a dirty great big exhasut back box, a spare wheel well and a huge transaxel inches from the leading edge of the spoiler the airflow hitting the spoiler will be turbulent therefore rendering the spoiler utterly useless. When an aeroplanes wing stalls it is because it looses smooth laminar airflow over its top surface therefore loosing lift.

 

[cococola]

At last with the help of Paul(many thanks!)Here is the rear splitter fitted and painted.What does everyone think??[8|]