Little Red Devil

[Jmac]

Cool, ill be keen to grab his contact info mate
Cheers
Jmac

[VWindahouse]

Here you go bud 02 9556 1799 it actually diverts to his mobile so just let it ring out.

Most of what he says goes over my head but you'll drink it up like mothers milk

[VWindahouse]

Just had a look through the gallery section on the APR site and found another hatchback with the same wing and it seems to be at the same angle of attack (as they call it) I just have the drag style side plates to reduce the overall height.





And they say this about the design

All GTC Series wings feature an aerodynamic 3D designed airfoil shape to obtain the optimal balance of downforce. This design allows for a reduction in drag, yet maintains an ideal level of downforce. Computational Fluid Dynamics (CFD) Analyses were performed on these wings to support validation of their aerodynamic design.

With some good technical data about the wing here

APR Performance - GTC-300 - CFD Data & Analysis

Thoughts?

[seangti]

You'll be best to answer your own question after some track time and recording you max speeds with differing set ups.

[VWindahouse]

That's a solid point mate, guess I finally need that G-tech upgrade!

[team_v]

At least it's angled in the correct direction, the amount of dodgy wings i see that would actually increase lift in the rear is phenomenal.

[seangti]

That's a solid point mate, guess I finally need that G-tech upgrade!

You're always welcome to use mine when I'm not. I find that it's essential to be able to review it on the computer, even for acceleration, power and brake testing as it displays the data much more accurately.

[blackbetty]

At least it's angled in the correct direction, the amount of dodgy wings i see that would actually increase lift in the rear is phenomenal.

yeah the design on most is purely for looks - some are totally non functional and act only as additinoal drag creaters.

but this wing on the little red devil looks bloody brilliant - i love that style.
one of the thing about rear wings on fwd cars - you dont want too much downforce back there, just enough to stop the tail being too happy. most rear wings are designed for rwd cars, to assist with the power staying in contact with the road. they will hurt your top speed but the loss should be offset nicely by better power out, especially on the medium to high speed corners. a way to experiment with how much downforce you need is with weight (start with empty vs full fuel tank) and then add ballast bags. and insterestingly the weight is not always best placed in the rear most point in the car. with a mid 90's honda civic it was best placed right over the rear wheels. we ended up with a dead flat roof extension / spoiler with adjusters for angle - i didnt design or make it (that was 10 yrs ago and i was merely the novice along for the ride).

fwd hatchbacks have a interesting air pressure system behind them (google wind tunnel images), compared to the pic of the porsche in the wind tunnel in the link above. the rear wing with the porsche assists in keeping the airflow as straight as possible over the top of the car - less change in direction the better. with a hatch its already pretty straight. so sticking the wing up too high will give you more downforce, but at high speed it will cause lots of drag.

its a fine art to get wings to a point where they work in balance with the rest of the car. and all sorts of little things can effect how well they work, tyre pressure, cross winds, tail winds, head winds...its a big topic.

[Jmac]

Here you go bud 02 9556 1799 it actually diverts to his mobile so just let it ring out.

Most of what he says goes over my head but you'll drink it up like mothers milk

Smashing

[VWindahouse]

At least it's angled in the correct direction, the amount of dodgy wings i see that would actually increase lift in the rear is phenomenal.

Lol yep, usually accompanied by a rear bumper in a lovely shade of primer!

You're always welcome to use mine when I'm not. I find that it's essential to be able to review it on the computer, even for acceleration, power and brake testing as it displays the data much more accurately.

Thanks mate, don't suppose you'd want to join the "pit crew"! I can see you laptop in hand deliberating with Gavin between sessions and telling me to man up and brake later

yeah the design on most is purely for looks - some are totally non functional and act only as additinoal drag creaters.

but this wing on the little red devil looks bloody brilliant - i love that style.
one of the thing about rear wings on fwd cars - you dont want too much downforce back there, just enough to stop the tail being too happy. most rear wings are designed for rwd cars, to assist with the power staying in contact with the road. they will hurt your top speed but the loss should be offset nicely by better power out, especially on the medium to high speed corners. a way to experiment with how much downforce you need is with weight (start with empty vs full fuel tank) and then add ballast bags. and insterestingly the weight is not always best placed in the rear most point in the car. with a mid 90's honda civic it was best placed right over the rear wheels. we ended up with a dead flat roof extension / spoiler with adjusters for angle - i didnt design or make it (that was 10 yrs ago and i was merely the novice along for the ride).

fwd hatchbacks have a interesting air pressure system behind them (google wind tunnel images), compared to the pic of the porsche in the wind tunnel in the link above. the rear wing with the porsche assists in keeping the airflow as straight as possible over the top of the car - less change in direction the better. with a hatch its already pretty straight. so sticking the wing up too high will give you more downforce, but at high speed it will cause lots of drag.

its a fine art to get wings to a point where they work in balance with the rest of the car. and all sorts of little things can effect how well they work, tyre pressure, cross winds, tail winds, head winds...its a big topic.

Yes took me a long time to decide on the "right" wing for the application. Which is why this one uses parts from three different applications. And so far so good. My fuel average consumption has returned to normal



That's a 45min drive home after work in traffic with aircon blasting. Also took Deans advice and took a side on shot which shows the middle is in fact almost flat at the attack side and then lips up only a an inch or so right at the rear. So I think it's the 3D airfoil design that makes it look like a much steeper angle of attack because the sides dip a fair way and it bulbs around at the bottom (look to the left far side of the pic). They say this is what helps reduce the drag.



Anyway I haven't had it off yet to be honest. Been driving some high speed twisty stuff out the back of Brisbane's north side where the speed limits go up to 100kph and have to say it's like being totally glued to the road. An amazing feeling so I can only imagine what it's going to be like at Lakeside. No doubt I will loose some top speed as I find the car won't coast as easily when you go completely off throttle at speed so there must be some drag. But that hopefully won't be an issue with the power figures we have planned

And these arrived today!!

[blackbetty]

i really like that wing, it just looks plain sexy.
i'd be interested in the general feeling you get from this wing as you start to make adjustments with it.
once its all adjusted as you want it, you should get a nice feel as you brake from speed, but ur mid corner and exit speed should be higher. and this will more than compensate any top speed loss from drag.

[VWindahouse]

Thanks mate, I'll definitely keep that in mind. Can't wait to let it rip

[seangti]

Thanks mate, don't suppose you'd want to join the "pit crew"! I can see you laptop in hand deliberating with Gavin between sessions and telling me to man up and brake later

Yup, would be happy to help out and be part of the journey, though am pretty time poor once uni kicks off again. Where and when I can be of assistance I'd be chuffed to be part of the journey/learning

[VWindahouse]

Fantastic mate, would be great to have you on board!

[9n3 Turbo]

You fitted those top mounts yet?