boi racers..

**Devil** · 17th August 2005, 11:16

Originally Posted by chris

...as wings don't tend to work when a car is sideways or travelling slowly.

I think that is all correct.

The wings do work when cornering, and yes, they're still just as effective. The whole point is to keep the car balanced.

**SARGE** · 17th August 2005, 11:18

Originally Posted by ManDownUnder

Word of advice Sarge San - never confuse rich for credit. I'm willing to bet they have shallow pockets with credit cards in them... one day they gotta pay it off...

true MDU..or mummy and daddy foot the bill.. or the P they sell to primary school kids..

giving me a Visa is like giving a monkey a hand grenade

**Mr Skid** · 17th August 2005, 11:19

*wants a wing on the XT600*

**scumdog** · 17th August 2005, 11:19

Regarding the last post by Chris #28 I think); a spoiler at the front is to dirrect air from going under the car and becoming 'dirty air' when it 'snags' on all the sticky-out bits under the car, it can also cause a low pressure area under the car at speed which increases the down-force on the tyres.

A rear spoiler is to streamline the flow of air so that the various airstreams that have parted to go around the car will merge without creating a vacuum (that would 'hold' the car back so to speak).

A wing has to have sufficient area and angle of attack to be effective - the downside being the increased drag at higher speeds.
Most wings on boy-racer type cars would at best put about 30-40kg downforce at 200kph.

Harumph,
(puts bifocals back in spectacle case, straightens all 4 pens in pocket protector, hangs up white coat and walks off).

**ManDownUnder** · 17th August 2005, 11:20

All this chat reminds me of the (ahem *cogh* only) day I had out at Pukekohe open day.

They boys in their cars getting out and going for it - got up to some reasonable speeds too, but there was the small issue of all the money being spent on making it go FASTER.

None (or not enough) of it had been spent to make them STOP faster... One skyline was doing a good rate of knots down the backstraight - and to be fair sounded nice too...

It disappeared in a cloud of dirt off the end of the backstraight. Brake fade!

OH DEAR

The guy was ok - so I was happy...

**SARGE** · 17th August 2005, 11:21

Originally Posted by Mr Skid

*wants a wing on the XT600*

wonder if i can mount one on my helmet...hmmmm

**Devil** · 17th August 2005, 11:23

Originally Posted by scumdog

Most wings on boy-racer type cars would at best put about 30-40kg downforce at 200kph.

There was a bluebird sedan (completely stock!) in my street that had a very purposeful looking wing. i.e a no bullshit, carbon fibre twin slat type wing. But it must have been at LEAST 45 degrees from the boot of the car. Apart from looking extremely gay on a nanna car, i'd love to know what they do to the fuel mileage. It had the sort of angle where you'd just get drag and no downforce!

**Pixie** · 17th August 2005, 12:39

Originally Posted by SARGE

i need to have a rant about these geniuses who feel the need to tack a spoiler the size of a Cessna wing on the back of their car. What the hell is wrong with these guys?

.

They suffer from misdirected masturbatory urges.And their shit boxes don't go fast enough to get aerodynamic effects,due to not having any suspension

**Pixie** · 17th August 2005, 12:48

Originally Posted by Devil

I hate the stupid spoiler thing too, BUT...
They're there for a reason, no matter what the drivetrain of the particular vehicle is. Its not just for getting power to the ground, its keep the car stable and stuck to the road while cornering. Take my mates race car for instance. Front wheel drive, needs a rather large wing on the back because theres no weight back there. It helps keep the back wheels on the ground while braking at speed (in the straights and corners) and stops the back of the car from overtaking the front when he's stomping round corners. Its all to do with holding the car down.

The vertical wings and tips (the ones that are there for a reason other than show) are for increasing stability at speed, straightening out turbulence as the air passes over/under the wing.

Im all for performance, but some of the wings you see around the place are just shit.

.
With all due respect ,Bullshit,How many Ferraris,Astons,Maseratis etc.that can approach 300kph are designed to look like a pram or lawnmower?

**Lou Girardin** · 17th August 2005, 12:58

Consider the ground effects in F1, they produce so much drag that just backing off the throttle produces around 1 g deceleration.
Get 'em sideways and they lose all downforce. Whoops!
Get behind another car and you lose so much downforce you can't pass.
Most grip problems on your average race sedan is due to poor mechanical grip caused by the compromised suspension systems they have. Aero packages attempt compensate for these problems.

**Pixie** · 17th August 2005, 13:00

Originally Posted by vifferman

Dumbest looking ones are those on small convertible sportscars, like the S2000 at the end of our street .

My MX5 had the factory spoiler on the back when I got it,That was the first thing to go.It didn't even have an airfoil section,so probably afforded no down force anyway.Then I raised the excessively lowered suspension and now it does go round corners.
These arseholes wouldn't have a clue.

**scumdog** · 17th August 2005, 13:05

Originally Posted by Devil

. Take my mates race car for instance. Front wheel drive, needs a rather large wing on the back because theres no weight back there. It helps keep the back wheels on the ground while braking at speed (in the straights and corners) and stops the back of the car from overtaking the front when he's stomping round corners. Its all to do with holding the car down.
.

Car must be a tad unaerodynamic if it needs enough spoiler to help him cornering/braking, the inverse lift it is needed to perform must cause a fair bit of drag at higher speeds.

Has he actually DONE any experiments to see how much down-force he is actually getting?? I have and it's easy to set-up a test rig on the car.

Be better if he could move existing weight further to the rear.