Discussion
i`ll be surprised if it lasts a week.
Often read threads on this splitter and keep meaning to do something... Since i now have a light weight bonnet which lifts rather a lot on the passenger side, maybe i should fit one. May go down the route of an electromagnet on the bonnet to keep it tight when engine running. This was suggested by Plasticman. Top idea.
I thought for ages about doing this. Therefore in true TVR style instead of buying one that might make no difference and fall off anyway, I went for a cut down piece of hexagonal guttering. Cut it down to two sides, and stuck to the undertray with no more nails - I wasn't expecting it to make a difference or stay on. I've half knocked it off once on a large speedbump that I know well but took too fast, and I think it really makes a difference. It had markedly stopped any bonnet lift, and I'm sure given a slight inprovement to the feel of the car. Overall worth it to me, all for a bit of strong glue and spare drainpipe!
Those magnetic store security labels are a brilliantly simple design 
(Bonnet catch comment)
I posted the gutterteknic splitter ages ago http://tvr3.dspen.com/Splitter/splitter.html
(Bonnet catch comment)I posted the gutterteknic splitter ages ago http://tvr3.dspen.com/Splitter/splitter.html
Edited by spend on Sunday 16th November 01:47
Yes it assists, but if your cooling is marginal then better to fix it first
It helps mainly in pulling air out from behind
oerrmissusmoment: just about anything / any shape under the front can create this effect (just so you don't get bogged down thinking its a complex aero scenario) IYSWIM.
It helps mainly in pulling air out from behind
oerrmissusmoment: just about anything / any shape under the front can create this effect (just so you don't get bogged down thinking its a complex aero scenario) IYSWIM.spend said:
Try putting it on backwards (trailing back) like a lot of teh cerbs have, I have tried and can't tell any difference. It does move the low point nearer to the wheelbase, so lasts longer?
Would make some difference to the cooling benefit. But I reckon it'd make a bucket load of difference to the stability issue!! Mounted backwards trailing in the airflow it would be doing a great impression of the first stage of flap you see sticking down at the back of an aircraft wing at take off. Just the job to give you extra lift at take off speed - or in this case at a lower speed than would be the case without the splitter at all! Nick.
The air is not directed into open space by the splitter, so I don't think the wing analogy holds true. I tend to think that just about any 'obstruction' in a confined space will create a leading bubble of air that is actually doing the hard work.
Having said that, all mine have had the lower lip vertical whichever orientation they have been fitted? Kind of:
______..______
....\...or.../....
.....|......|.....
Having said that, all mine have had the lower lip vertical whichever orientation they have been fitted? Kind of:
______..______
....\...or.../....
.....|......|.....
As Dave has said it will make absolutely no difference what so ever which way you fit it, it's there to 'disturb the air and create a swirl which creates a negative air pocket and so aid air being sucked in through the rad, it also has the benefit of sucking the bonnet down.
I've exprienced the car with the splitter present and missing and the only real benefit I've seen or felt is the bonnet didn't flap with it fitted.
Also as Crazynick has said on a similar thread elsewhere TVRs never went anywere near windtunnels so anything such as this is a suck it and see solution.
I've exprienced the car with the splitter present and missing and the only real benefit I've seen or felt is the bonnet didn't flap with it fitted.
Also as Crazynick has said on a similar thread elsewhere TVRs never went anywere near windtunnels so anything such as this is a suck it and see solution.
Found this:
Splitters, extending forward and underneath an air dam/spoiler, use the same principle as a spoiler but operate differently. Since the front of the car is a blunt shape, the oncoming air is slowed substantially, resulting in a high-pressure zone known as a stagnation point. By placing a horizontally protruding splitter plate right in the thick of this high-pressure zone, a large amount of efficient downforce can be generated. The splitter, hence its name, splits the high-pressure zone from the low-pressure high-speed flow moving under the car. Pressure varies with the car's speed squared, so downforce increases quickly as the speed increases. Generally, the effects are felt at speeds over 75mph.
By having the splitter facing back it will be assisting the flow of air from the high pressure area to under the car. High pressure under the car equals lift.
Splitters, extending forward and underneath an air dam/spoiler, use the same principle as a spoiler but operate differently. Since the front of the car is a blunt shape, the oncoming air is slowed substantially, resulting in a high-pressure zone known as a stagnation point. By placing a horizontally protruding splitter plate right in the thick of this high-pressure zone, a large amount of efficient downforce can be generated. The splitter, hence its name, splits the high-pressure zone from the low-pressure high-speed flow moving under the car. Pressure varies with the car's speed squared, so downforce increases quickly as the speed increases. Generally, the effects are felt at speeds over 75mph.
By having the splitter facing back it will be assisting the flow of air from the high pressure area to under the car. High pressure under the car equals lift.
Edited by poorpeet on Wednesday 19th November 18:43
Nice quote, but the splitters described there are the flat (horizontal) pieces you see protruding forward of some air dams/spoliers.
The TVR 'splitters' are incorrectly named once you start getting technical and are in fact merely a piece of bent alloy or fibreglass that sticks out into the airflow and as a result creates a bit of disturbance and hence negative air pressure behind them so should really be called 'spoiler's if anything. Apart from being in the wrong place to work as described the airflow is not contained or separated (split) by any sideplates, airdam/spoiler or complex aerodynamics that would make it 'work' in the way that piece describes.
I guess you might start to see lift if the bottom of the car was flat but as it's full of holes you won't
The TVR 'splitters' are incorrectly named once you start getting technical and are in fact merely a piece of bent alloy or fibreglass that sticks out into the airflow and as a result creates a bit of disturbance and hence negative air pressure behind them so should really be called 'spoiler's if anything. Apart from being in the wrong place to work as described the airflow is not contained or separated (split) by any sideplates, airdam/spoiler or complex aerodynamics that would make it 'work' in the way that piece describes.
I guess you might start to see lift if the bottom of the car was flat but as it's full of holes you won't
Edited by V8 GRF on Wednesday 19th November 18:24
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