aerodynamics

[dnbsi]

are there any numbers on the aerodynamics/downforce our car creates. as you pick up speed does it create more downforce? what about with the hfp front lip? will it prevent lift?

[Gone]

I highly doubt it will make much of a difference really. In fact, I bet it causes slightly more drag considering the increase in frontal surface area.

[SoCal07Si]

The spoilers might produce a few pounds, but thats it

[dnbsi]

i remember a post about a race built si for autocross by a well known company and they put the front lip on theirs. i think the way the bottom part of it angles out would provide a little downforce. either way, i'm curious about the design of our car in general. how aerodynamic is it?

[Gone]

If I remember correctly, the 2006 Civic's Cd is like 0.31 or so.

I don't know if thats with the HFP kit or not (but probably not)

[dnbsi]

yeah, it is .31 which is fairly good. i'm more curious about the downforce characteristics of it. for example the iroc z had a certain speed where it would become much more stable and planted to the road. the new gtr is designed to add more downforce the faster you go, as well as some porsches.

[Izzy]

All race cars are designed to have downforce at speed. You can't have downforce that will make the car run on the ceiling while only going 40.

I don't particularly think our cars are designed with that in mind.

[SoCal07Si]

Originally Posted by Izzy

All race cars are designed to have downforce at speed. You can't have downforce that will make the car run on the ceiling while only going 40.

I don't particularly think our cars are designed with that in mind.

Mine can

[habitat]

In order to accurately measure downforce, you'd have to put the civic in a wind tunnel. And if someone put a civic in a wind tunnel, it would probably be the Civic Hybrid to lower the Cd for increased mileage.

If you want more frontal downforce, get some kind of front splitter... anyone of them will do.

[eXe]

Originally Posted by dnbsi

i remember a post about a race built si for autocross by a well known company and they put the front lip on theirs. i think the way the bottom part of it angles out would provide a little downforce. either way, i'm curious about the design of our car in general. how aerodynamic is it?

Its pretty decent...but nothing to really boast over.

Originally Posted by Gone

If I remember correctly, the 2006 Civic's Cd is like 0.31 or so.

I don't know if thats with the HFP kit or not (but probably not)

Originally Posted by dnbsi

yeah, it is .31 which is fairly good. i'm more curious about the downforce characteristics of it. for example the iroc z had a certain speed where it would become much more stable and planted to the road. the new gtr is designed to add more downforce the faster you go, as well as some porsches.

. Cant compair to the porches, they have certain techniques they add to their vehicles that would out-due our downforce.

[dnbsi]

the hybrid does actually have a significantly lower Cd

[TMR Net Shark]

Roll down your windows.. there's your downforce you need..


But to be honest.. the rear spoiler does very little. But I do believe it makes the car stay straight at higher speeds.

[habitat]

Originally Posted by TMR Net Shark

Roll down your windows.. there's your downforce you need..

Nope, that's called increasing drag.

[TMR Net Shark]

Originally Posted by habitat

Nope, that's called increasing drag.

I was kidding.. lol

[habitat]

Originally Posted by TMR Net Shark

I was kidding.. lol

Just making sure... sounds like BACKforce to me anyhow

[TMR Net Shark]

Originally Posted by habitat

Just making sure... sounds like BACKforce to me anyhow

No, it's just drag.. that's all.

[humboldt1498]

All race cars are designed to have downforce at speed. You can't have downforce that will make the car run on the ceiling while only going 40.

You'd be suprised! Ever heard of Chaparral?

The most unusual Chaparral was the 2J. In addition to a powerful 700 hp engine, and a three-speed semi automatic transmission, the back of the 2J housed two 17-inch fans driven by a 45 hp snowmobile engine. The purpose of the fans was to 'suck' air from under the car and propel it out the back. This gave the car tremendous gripping power and enabled greater maneuverability at all speeds, which cannot be achieved by simpler aerodynamic devices such as diffusers and wings. Since it created the same amount of vacuum under the car at all speeds, down-force did not decrease at lower speeds. With other aerodynamic devices, down-force decreases as the car slows down or achieves too much of a slip angle, both of which were not problems for the 'sucker car'. It also had ground effect skirts to keep air from leaking in, a technology that would appear in Formula One several years later. The 2J competed in the CanAm series and often qualified at least a couple of seconds quicker than the next fastest car, but was not a success because it was plagued with mechanical problems. It ran for only one racing season in 1970 as its technology was quickly outlawed by the SCCA (even though it was approved by the SCCA prior to the car's first race). The SCCA succumbed to pressure from other teams, McLaren in particular, who argued that the fans constituted 'movable aerodynamic devices' which were outlawed by the international sanctioning body, FIA. There were also complaints from other drivers saying that whenever they drove behind it the fans would throw stones at their cars. McLaren argued that if the 2J was not outlawed, it would likely kill the CanAm series by totally dominating it - ironically, something McLaren had been doing for years[1]. A similar suction fan was used in Formula 1 eight years later for the 1978 Swedish Grand Prix, by the Brabham BT46B but was banned soon after. The 2J is the other Chaparral to appear in Gran Turismo 4.

[fiji-blew]

^^

[xheartcore_boyx]

what is the benefit of down force ?


note:nice enough to tell? no nerdy wiki please.

[Gone]

To put it in really laymans terms, think of it as the force of the wind going over a particular part of the car that pushes it down into the ground.

Does that help?

Originally Posted by dnbsi

the hybrid does actually have a significantly lower Cd

I don't think 0.27 is significantly better than the normal civic's 0.31