Ferrari's underbody work

[GaryE30]

Not entirely true...

the lift results from circulation around the wing, the airfoil shape is the most efficient way to get the circulation.

That's the reason you can put an engine on a pizza box and get it to fly.

Also, the lift vector will be tilted back more producing drag.

I believe you're referring to the delta wing (seen on jets) where the shape of the aircraft/wing generates a vortex above the wing resulting in extremely high velocity air and therefore extremely low pressure, ultimately resulting in lift.

On an automobile wing or commercial airliner its due to the same principle of velocity and pressure just in a different manner as stated in my first post. I cannot relate to your "circulations".

Just some tests I've run in the past.

Delta Wing (16 deg. angle of attack)

Airfoil (symmetric and 0 deg. angle of attack) Similar to non-symmetric if angle of attack is increased.

[JMil86]

I'm so insulted! Of course being part of R3v/E3s since 2002 has nothing to do with my post count, right? 6.5 posts a day since 2003, wow I must be a loser. The only person making a big deal out of my mod status is you (famous? with an anonymous SN? On an E30 forum? LOL).

BTW I'm married. ;)

Sorry for off topic.

Burying the hatchet on my end. I'm done with this. So many more pointless insults, and stupid bs could go back and forth. No point in wasting anymore of either of our time.

[metroya_performance]

volvo lips?

[Jean]

This all sounds like a huge waste of time and money that would be better spent elsewhere.

Exactly...like volvo lips and angeleye headlights ...

[nando]

Oh man, you are so cool, because you have a ton of posts and are a moderator. Never mind, sorry I'm not famous in the r3v community like you are. Famous like Michael Jackson. Who are you again? Nando who has nothing better to do than post on a forum. I bet you get any girl you want.


Interesting diagram. Saved.

I'm so insulted! Of course being part of R3v/E3s since 2002 has nothing to do with my post count, right? 6.5 posts a day since 2003, wow I must be a loser. The only person making a big deal out of my mod status is you (famous? with an anonymous SN? On an E30 forum? LOL).

BTW I'm married. ;)

[JMil86]

who are you again?

oh yeah you drive like a moron and r3ved your car. You're just butt hurt because I didn't give you a cookie for being stupid.

Oh man, you are so cool, because you have a ton of posts and are a moderator. Never mind, sorry I'm not famous in the r3v community like you are. Famous like Michael Jackson. Who are you again? Nando who has nothing better to do than post on a forum. I bet you get any girl you want.


Interesting diagram. Saved.

[SA E30]

This all sounds like a huge waste of time and money that would be better spent elsewhere.

On a road car maybe, but on a race car maybe not so much. Although some might say it would be easier and cheaper to add more hp.

[nando]

This all sounds like a huge waste of time and money that would be better spent elsewhere.

thank you for your thoughtful and insightful post. It has truly enhanced this thread. ;)

[txtorquemade]

This all sounds like a huge waste of time and money that would be better spent elsewhere.

[idanity]

R
best form of ground effects are tunnels built into the undertray that create a venturi (think of two basically hour glass shaped tunnels). Then, you add a diffuser at that back of the car to slow that air back down and reduce the turbulence as the air expands back out again. This both increases downforce and reduces some of the parasitic drag. This type of setup on an E30 would be very difficult to design.

kinda like these awesome pix







images from one of my favorite pages i found at work being bored.
i know its old, but its awesome








i have aways wanted to add flat panels to the bottom of all my cars (like porsches)
maybe i will attempt this next.

[nando]

not really, there's a ton of different gear ratios available. and it's not like redlines are set in stone, if you're building a motor that makes enough power to do 150+ you can build it with a 7500-8000rpm redline if you want.

even with 4.10s, I could hit ~142mph at my peak power of 6500rpm in 5th gear. I've never been to a track where that's even possible though, and I'm certainly not going to do it on the street. :)

[Kershaw]

doesnt the gearing restrict the e30 to less than 150 anyway? you could have 300whp, but you'll run out of rpms before you run out of power.

i know my rx8 can hit "186mph" on a dyno due to lack of wind resistance, because thats where 6th gear tops out at. turbocharged rx8s do 175 with about ~300whp. stock they do about 150. i hit 149 and i was almost at the end of 5th. closedroadonatrackdontdothatonapublicroad.

[Danny]

Mom needs to check his Prozac. Teenage angst.

:rofl:

[hoveringuy]

I know this was 6 years ago, but it is wrong. Since someone already bothered to bump it, I'll contribute to this part. E30 is a brick though. You won't gain much if anything from that.

The non-symmetric airfoil is shaped such that the velocity of the air traveling over the top is faster than the air traveling underneath which results in lift.

Velocity increase = pressure decrease
Velocity decrease = pressure increase

Therefore... lower pressure on top and higher pressure underneath results in lift.

Note: picture for reference

Not entirely true...

the lift results from circulation around the wing, the airfoil shape is the most efficient way to get the circulation.

That's the reason you can put an engine on a pizza box and get it to fly.

Also, the lift vector will be tilted back more producing drag.

[GaryE30]

unless im mistaken youve got that backwards
an airplanes wings are curved on top to slow the wind going over them so they can produce an upward suction force.
so if you really wanted to you should put dimpled panels like the new lexus (or whatever it is) to slow the air down and creat a low pressure area under your car.

and im pretty sure in most of the super cars at least the S7 air is channled (i cant spell anything) from under the car upward creating down force

correct me if im wrong

I know this was 6 years ago, but it is wrong. Since someone already bothered to bump it, I'll contribute to this part. E30 is a brick though. You won't gain much if anything from that.

The non-symmetric airfoil is shaped such that the velocity of the air traveling over the top is faster than the air traveling underneath which results in lift.

Velocity increase = pressure decrease
Velocity decrease = pressure increase

Therefore... lower pressure on top and higher pressure underneath results in lift.

Note: picture for reference