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Aerokits

mbrands

mbrands

PCGB Member
Member
Does anyone have any pictures that show the difference between the various Aerokits that were available on the 993 (Aerokit I, 1b, II etc)?

I quite like the one that '986er' has on his 993C4 (have you sold it yet ?).
Is it the Aerokit 1b ? I'm actually more interested in the front splitters than the rear wing. Porsche doesn't recommend it, but would I really be risking life and limb by mounting the front bits without having the big fixed rear spoiler ?

Regards,
Marc
 
Marc,

As you have obviously seen mine no need to post a picture! Don't see any reason not to just fit the front splitters, different about the rear spoiler as that does make the front very light at speed!

Car has not been sold, getting fed up with tyre kickers and dreamers. So if anybody is looking for a 993 drop me a line[:D]
 
Marc there are 3 main variants on the front splitter, which are supposed to air front downforce ! may be more ?!!

a normal add on, an RS version and a GT2 type all with increasing levels of front downforce through the effect of changing the air pressure as the air flows around......
 
These are the RS splitters, without the rest of the RS aerokit. I think Maurice disapproves on aerodynamic grounds... but I've found the car stable enough and I like the look.
 
ORIGINAL: MoC2S

Hey, if you keep under 100 MPH, it doesn't really matter. But the rear lift figures with the flip up are significant, and you will exacerbate the situation with a better front .... so don't do hard cornering above 120 ... [8|]

cheers, Maurice
Click to expand...

been busy driving miss daisy..... [8D]
 
ORIGINAL: MoC2S

Hey, if you keep under 100 MPH, it doesn't really matter. But the rear lift figures with the flip up are significant, and you will exacerbate the situation with a better front .... so don't do hard cornering above 120 ... [8|]

cheers, Maurice
Click to expand...
No worries, Maurice, I strictly limit my hard cornering to 110. [:)] More seriously... been thinking... will a better front really reduce downforce at the back? Won't that just stay the same???
 
No, a better front will increase downforce at the front and leave the rear unchanged. Resulting in a more tail happy car.

Ian.
 
I don't get it! Why will no change to rear downforce mean a more tail-happy car? If there's no change the rear will be just as stable (or unstable as the case may be). More downforce at the front will mean it'll be more planted there, so there could be a change in feel based on the relative downforce balance. But that's it.

Or am I missing something??? [&:]
 
You are changing the balance of lift front-back. I think that's the issue.

I think "more downforce" is a bit of a misnomer... As Maurice says - "less lift" might be more appropriate [;)]

Have we any aerodynamisits in the house? [:D]
 
No you are not going mad I should have been clearer with my answer ...

If you go currently go around a corner at 70 miles an hour because this is what feels safe then if you fit only a front spoiler and go around the same corner at the same speed of 70 miles an hour nothing will be different. The front has more downforce, the rear has the same but there was already enough to safely navigate the corner.

What changes is how the car behaves when you get nearer the limit. As Mark says its the balance that changes. Where as previously the car would tend to understeer as you approach the limit now the front would turn in better and because you have turned in faster the rear would now tend to start to slip causing oversteer which I described as tail happy.

Also yes technically there is a difference between 'down force' and 'less uplift' as the first means 'being pushed into the ground' and the second means 'being lifted from the road less'. The shape of the 993 means that as the air passes over the roof it wants to go straight on not down over the engine lid thereby causing a vacuum over the rear of the car which results in the back of the car being lifted from the road as the car goes faster. The RS spoiler reduces this effect significantly. Can't remember off hand which it is at the front but you can find the front and rear forces for the standard 993 and all the different Aerokits if you look.

Ultimately if have too much downforce at the front and not enough at the rear a car will flip 180 degress rear to front at very high speed. Sometimes seen on Le Mans racers in the past. That's why Le Mans racers tend to be 'long tail' versions of a particular car. Doesn't apply to us road drivers fortunately!

Ian.
 
Got it! Thanks. I suspect that the science is rather more complex than discussed here, but this level will do me fine... [8|]
 
Thanks guys I'm going for just the Aerokit 1 front splitters for now, but will take care in those 120mph corners [;)]. Any idea how to attach them ? Are they glued on ? (by the way the difference between Aerokit I and 1b is that the 1b has a 3rd brake light).

So, still no rear downforce with the standard RS rear spoiler ? I wonder how much lift there must be with just the flip up...
 
ORIGINAL: mbrands

Thanks guys I'm going for just the Aerokit 1 front splitters for now, but will take care in those 120mph corners [;)]. Any idea how to attach them ? Are they glued on ? (by the way the difference between Aerokit I and 1b is that the 1b has a 3rd brake light).

So, still no rear downforce with the standard RS rear spoiler ? I wonder how much lift there must be with just the flip up...
Click to expand...

They screw and bolt on using the original bolts/screws. Very easy DIY
 
I guess you get them painted before, right ? Or do they need to be on the car prior to painting so that the colours can be 'blended' in with the rest of the bumper ?
 
They need to be painted before. I'd get that done by a bodyshop and ask them about matching/blending issues.
 
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