15 replies to this topic

[Lordbenny]

I hope you dont mind me postind a seperate 'How to...' thread (I know there is atleast one other on the site) but I was so happy with the result I thought I'd share it with you.

Here's how it looks out of the bag


Trim off the small 'lips' on the 'pegs' so it sit flush with the underside of the car


Cut off the 2 centre sections, these sit behind the number plate so arn't seen anyway


Centre the splitter in place and hold with gaffer tape


Drill 2 6mm holes to fix the corners of the centre section down neatly


This is what they look like when they're riveted in place. The rivets are strong and I used 5 on each side. I used the original turbo splitter holes where I could and drilled a couple of extras.


Halfrauds 6mm plastic closed end rivets did the job well


Underside


I trimmed the ends (using strong scissors!) flush with the wheel arch


JOB DONE

[GeorgeBC]

Looks good what car is the splitter from?

[Lordbenny]

Looks good what car is the splitter from?

Seat Leon Cupra, just go into your local SEAT dealer and ask for a : 1ML805903 Pay no more than £25 including VAT!

[zx9rjason]

Does is actually improve downforce at the front? Mine is still standard and want to add a diffuser to the rear soon, but I feel I need more donwforce at the front not rear! Obviously it needs 60mph plus to start working presumably?

[Lordbenny]

Does is actually improve downforce at the front? Mine is still standard and want to add a diffuser to the rear soon, but I feel I need more donwforce at the front not rear!

Obviously it needs 60mph plus to start working presumably?

Unless your rear diffuser sticks at least a foot out the back and the front one 10 inches at the front AND your car is a maximum 4 inches off the ground Im pretty sure that there are no advantages to be had from any non-motorsport aero add-ons apart from the fact that they look cool!

[GiGo]

Looks great! Also well done on showing me the Halfords Trim Panel Rivits, I need some of them, was wondering where to get them, 

[2.2_na]

Seat Leon Cupra, just go into your local SEAT dealer and ask for a : 1ML805903 Pay no more than £25 including VAT!

Looks really good

How long did in total did it take you to fit it?

[Lordbenny]

Looks really good

How long did in total did it take you to fit it?

Thanks Took about 3 hours. All you need is a very strong/sharp pair of scissors (I used kitchen ones!), a tape measure, 6mm drill, plastic rivets, some gaffer tape and that's about it! You have to jack the car up so you can get underneath it. I've read threads where you're told that you will need to warm up the bend on the splitter to make it fit easier in a hot bath or heat gun but it didn't find that necessary and I did the job on my own!

[siztenboots]

Does is actually improve downforce at the front? Mine is still standard and want to add a diffuser to the rear soon, but I feel I need more donwforce at the front not rear!

Obviously it needs 60mph plus to start working presumably?

Unless your rear diffuser sticks at least a foot out the back and the front one 10 inches at the front AND your car is a maximum 4 inches off the ground Im pretty sure that there are no advantages to be had from any non-motorsport aero add-ons apart from the fact that they look cool!

i don't see lots of aeroplane falling out of the sky, so I think we can safely assume these do work.

[Lordbenny]

Does is actually improve downforce at the front? Mine is still standard and want to add a diffuser to the rear soon, but I feel I need more donwforce at the front not rear!

Obviously it needs 60mph plus to start working presumably?

Unless your rear diffuser sticks at least a foot out the back and the front one 10 inches at the front AND your car is a maximum 4 inches off the ground Im pretty sure that there are no advantages to be had from any non-motorsport aero add-ons apart from the fact that they look cool!

i don't see lots of aeroplane falling out of the sky, so I think we can safely assume these do work.

Sorry, I dont really know what you mean? Ok, the down force wings on the back make some difference but I cant see what lip spoilers & non-motorsport diffusers really add to down force on our cars, They're just too short at the front and back and most of our cars ride height is too high from the ground to make any difference.

But then again, I know absolutely nothing about the physics of it all so if they do work then that's great!

Edited by Lordbenny, 14 November 2010 - 03:39 PM.

[siztenboots]

i think this link gives a nice easy to understand explaination http://www.racecar-e...-explained.html

[2.2_na]

But then again, I know absolutely nothing about the physics of it all so if they do work then that's great!

As long as the air pressure pushing down on the splitter (when driving fast) isn't enought to make it fall off.

[Lordbenny]

i think this link gives a nice easy to understand explaination

http://www.racecar-e...-explained.html

When I said "absolutely nothing" I do realise that the front lip spoiler needs to be attached to the leading edge of the car and that it protrudes as far as possible so that as much of the air flows over the car as possible, the same at the back. I also realise that for this system to really work your car needs to be a maximum of 50mm from the floor. Totally impracticle for road cars!

[siztenboots]

I have remade new mounting points for the diffuser to the subframe, to allow me to quickly adjust the height in the pitlane. For track I run it at 60mm on the step.

[zx9rjason]

Well looks like a good mod to me, with or without dramtic effects to downforce....I may have a go at doing this myself!

[sford]

Whilst I understand that diffusers are supposed to be as close to the ground as possible, I can't help but think that moving them closer to the road/surface away from the body of the car is going to make very little difference. My understanding of them is that they create lower pressure, forcing/sucking air out from under the car. I recently read the Competition Car Aerodynamics book and it would seem the angle of the diffuser compared to the angle of the underside of the car is what made the difference to how effective it was(creating a bigger void for air leaving the underside of the car to fill). The fact that the diffuser is closer to the ground, reducing the angle of effectiveness of the diffuser surely will just mean that the underbody of the car is longer and there is no lower pressure area for the air to evacuate into. Forgive my ramblings as I have had a couple of beers and the book is now wrapped for it's intended recipient as a Christmas gift and I cant re-read it any more. Edit, followed a link to this page so apologies for the crazy thread resurrection, if that is the case!

Edited by sford, 21 December 2011 - 10:27 PM.