problems with wiping my bum?

[Bobfish]

not at 170 granted, buy easily 100+ in a lot of places if you use the car on circuits a lot.

[T11MNM]

Data generated from the links above suggests that the spoiler doesn\'t do anything and is merely a cosmetic part.
 
I doubt very much the standard spoiler generates enough down force for it to be noticeable around a circuit.

[weejimmy]

Where are you going to be cornering at 170mph?

the ring . . . .

[Bobfish]

Show me a video of you going round any corner at the ring at 170mph and i will buy you the spoiler of your choice

[AtomicRex]

Where at the Ring are you cornering at 170mph???
 
Diffusers do work.  The problem with the aftermarket ones is they don\'t!  Its that simple.  They cause drag so will slow you down, they weigh more so will slow you down, and if you crash because you think you have improved aero then that will slow you down also.
 
The purpose of a diffuser is to slow the air down having been first sped up at the front of the car.  So rather than considering just the rear you need to consider the front...to speed up the air, the flat floor....to keep the air smooth and at the same speed, the side skirts to avoid air from spilling out, and the diffuser to slow the air down to avoid pressure drops thus creating drag.  The problem with the show diffusers is they have to work around the exhaust and the other problem is the fuel tank doesn\'t allow a deep enough tunnel to increase the volume to bring the air back to the correct speed.
 
Get round these problems....and you will have an aero package that works.  As Sam says...."Watch this space"

[AtomicRex]

I think the other problem with most spoilers is their positioning.
 
Get hold of your spoiler firmly in both hands....and wiggle it. If the spoiler moves back and forth then its about as much use as a chocolate fireguard...nice to look at but will produce drag....granted the chocolate fireguard wont produce any drag...maybe a sticky mess, but it will taste a lot better!!!
 
Most of the spoilers are attached to the rear boot which is made of very thin metal...not much rigidity
 
We ran a wing last year, same as TonyC, modelled from a Formula 3000 car and this was attached via Carbon stays to the rear quarters.  You can stand on the wing...even jump up and down on it...bring your mates over and have a party on it....and it will be fine!
 
This year we\'re running a bespoke double element wing, but still mounted on the rear quarters. However because we are running a diffuser we don\'t need to run such an acute angle of attack on the wing, so our drag will be a lot less.

[ENVYD]

this looks like a good wing, looks like the fitting AtomicRex
 
http://www.youtube.com/watch?v=xbKtHL06xmQ

[AtomicRex]

This is the one we made for Tony
 

 
If you are being purist...and this discussion is about getting the best. The stays need to be solid otherwise they disturb the airflow around them.
 
The ones featured in this picture are a two piece stay....and we have now made some new ones that are connected, we put on Tony\'s car for the Race. These use a Wing profile on them too.

[weejimmy]

Show me a video of you going round any corner at the ring at 170mph and i will buy you the spoiler of your choice

the whole point is i dont want a spoiler lol
 
i havent even ever been to the ring .
 
i but i have had a 300bhp astra "skip" at an indicated 175 it wasnt as funny as i thought it was aperently.
 
well im split decisions now.
 i see the point about aftermarket diffusers.
but then if my spoiler isint doing jack anyway mayby ill just be in the same position as i am now anyway,.
 
i thought the idea was to get air traveling as fast as possible under the car to reduce presure didnt know you had to slow it down again. why is that?
 
what time scale are you thinking for your proper diffuser then?

[interloper393]

just do a simple test bud, do a corner at 170mph without the wing, when u crash buy a new car, then do the same corner with a wing at 170mph, when u crash buy another car and make your decision

[AtomicRex]

One of the points that is missed is suspension set up.
 
Bumps in the track, as I assume you were on a track whilst doing a 175, can often affect the car dramatically.  The wrong springs and damping will exacerbate the issue even further!
 
Your speedo in the Astra should start working on Jackanory with stories like that!

[AtomicRex Racing]

what time scale are you thinking for your proper diffuser then?

To answer your question, They are pretty much complete however it really isn\'t a simple bolt in job as you wont be able to keep standard fuel tank, or exhaust, rear bumper would need modifying, as would some of the boot floor. Ow and the rear sub frame would need a little bit of work.

And to make it effective you will need to run a proper aero front splitter and flat floor.

(unfortunately they wont be available for sale or any pictures shown until our cars are launched, *Not too long now*)

So basically to sum up.
Our defuser wont suit too many people, but it looks the dogs danglys and will actually work.  The Re-A and simular defusers do look cool for sure but please dont be under the impression that they are in any way helping with downforce as the only way they are doing that is by adding weight to the rear.

[weejimmy]

mmm not too shure on cuting up my boot floor.
would be nice to see it thoe.
 
would a tamed down version not be viable? just a bit less effective?

[AtomicRex Racing]

would a tamed down version not be viable? just a bit less effective?

perhaps we could look into it, but to be honest as i said before without a flat floor it would be practically useless anyway.  

And also if you wanted to keep standard exhaust it would be useless  as it would have to interrupt one of the channels.  

What we sell is not for show it is for performance as that it our target area. As said, it wont be everyones cup of tea unfortunately :Tongue1.

[weejimmy]

flat floor as in a flat under tray from front to diffuser?
 
, well look forward to seeing the proper one anyway