Little Red Devil

[seangti]

hey mate, the effect of adding downforce is to add directed (useful) drag/resistence. Given the "black art" of downforce, lots of time and money goes into it with variable results, or at least hard to quantify. Could an alternative approach be to focus on minimising drag and therefore focus on say the polo bluemotion which has a very low drag coefficient. Low drag = high speed.

My train of thought is that lakeside has one high speed corner, the dog leg. QR has two, turns one and two, so downforce during cornering on these 2 local circuits isn't a critical component of putting together a good lap. All other corners on these 2 circuits are sub 100km/h or thereabouts.

[jasn78]

Car sounds good mate

[VWindahouse]

hey mate, the effect of adding downforce is to add directed (useful) drag/resistence. Given the "black art" of downforce, lots of time and money goes into it with variable results, or at least hard to quantify. Could an alternative approach be to focus on minimising drag and therefore focus on say the polo bluemotion which has a very low drag coefficient. Low drag = high speed.

My train of thought is that lakeside has one high speed corner, the dog leg. QR has two, turns one and two, so downforce during cornering on these 2 local circuits isn't a critical component of putting together a good lap. All other corners on these 2 circuits are sub 100km/h or thereabouts.

Wise words mate. And that was the exact decision I came to a few pages ago when concentrating mainly on reducing rear end drag instead of going a very complicated rear diffuser design.

For the Blue Motion the only changes I know of from our cars are the front upper grille deflecting air over the bonnet (not an option as I want as much air to hit the upper part of the front mount and Rad.
The front lip which seems to channel air flow uniformly under the centre of the car as there are minimal restrictions getting in the way of the flow of air (I think at the speeds I'll be travelling a small splitter that also acts as an underbody tray to about the start of the front underbrace will do). Once again the category rules only allow for a 50mm distance from the front bumper so that's fine and means I don't have to bolt it up to the chassis to make sure it won't fly off.
The side mirrors I believe are the same.
And finally the weird looking rear roof spoiler which is meant to reduce turbulence close to the rear of the car reducing drag (I have one of the best designed rear wings on the market for added downforce yet minimal drag so good compromise)
APR Performance - New GTC-200 - CFD Data
And the side skirts which I'm looking into

However Sydney Motorsport Park is a very high speed track so down the track I may have to reconsider a few things.

Cheers.

[VWindahouse]

Car sounds good mate

Haha thanks mate! Not too loud for morning traffic?

[VWindahouse]

Sound clip

[team_v]

Sounds really deep and throaty, can't wait to hear it at Happy Laps

[Lito]

Sounds tough as bro!

[h100vw]

Too quiet?

Gavin

[gavs]

hey mate, the effect of adding downforce is to add directed (useful) drag/resistence. Given the "black art" of downforce, lots of time and money goes into it with variable results, or at least hard to quantify. Could an alternative approach be to focus on minimising drag and therefore focus on say the polo bluemotion which has a very low drag coefficient. Low drag = high speed.

My train of thought is that lakeside has one high speed corner, the dog leg. QR has two, turns one and two, so downforce during cornering on these 2 local circuits isn't a critical component of putting together a good lap. All other corners on these 2 circuits are sub 100km/h or thereabouts.

Irrespective of if Anth goes with a diffuser at some point, the point I was making previously was that at the expense of less drag, the addition of high velocity, positive pressure into the negative pressure wake of the car would more than likely make the rear of the car unstable and render the wing useless. What I was suggesting was that he explore the addition of a flat floor on the car, with or without a basic diffuser to eliminate the drag issues cause by the rear bumper. I've seen many a Soarer or supra lose their expensive, votex rear bumpers on drag strips due to the drag from the bumper and I've also seen how just covering that area in can solve the issue cheaply, effectively an without the cutting of holes.

Undercar aero tuning does not increase drag and is why so many exotics now no longer sport the garish wings present during the 90's. you can have highly efficient negative lift without the traditional sacrifice of drag caused by wings and spoilers.

Anth I'll try to draw my thoughts up at some stage for you.

[MountainBikeMike]

Irrespective of if Anth goes with a diffuser at some point, the point I was making previously was that at the expense of less drag, the addition of high velocity, positive pressure into the negative pressure wake of the car would more than likely make the rear of the car unstable and render the wing useless. What I was suggesting was that he explore the addition of a flat floor on the car, with or without a basic diffuser to eliminate the drag issues cause by the rear bumper. I've seen many a Soarer or supra lose their expensive, votex rear bumpers on drag strips due to the drag from the bumper and I've also seen how just covering that area in can solve the issue cheaply, effectively an without the cutting of holes.

Undercar aero tuning does not increase drag and is why so many exotics now no longer sport the garish wings present during the 90's. you can have highly efficient negative lift without the traditional sacrifice of drag caused by wings and spoilers.

Anth I'll try to draw my thoughts up at some stage for you.

+1. Been having a good read of this thread. Interesting stuff!