:iagree:

Then on top of that... if the results proe to be that drastic... we'll know for sure we're lacking SOMETHING! :cool:

 

Possible solution for high preasure area under the hood:
http://aerodyn.org/Drag/blc.html

A boundary layer... a double walled pan with vents in the back where we can channel the air from the engine compartment back to the rear suspension and then dump it after a deflector! Increased cooling to the rear brakes, differential, or the trans! And the side-effect of relieving a high preasure area (90-100 float early model C3's expeirence...)

So heres the new upgraded ( :jester ) idea... run the main pan under the car all the way across under the transmission and all... leave space at the front of the pan for air in the engine compartment to run down through the transmission tunnel to the rear suspension where it gets dumped with a diverter so its going left and right! Then behind the rear suspension add a deflector plate which is slightly lower then the rest of the pan with a slope heading up to the rear bumper, the pan being right off of the rear springs location giving the point of downforce (the venturi effect... the spot right behind the edge of the pan would be the low preasure area as the air is accelerated by it!)

Then, Possibly make this rear section adjustable, where its quite similar to an inverted racing spoiler, turn buckles attached to the frame rails so you can drop the leading edge closer to the track :cheers:

What do you guys think?

 

i'm trying to soak it all in, at first it sounds more complicated than it needs to
be about the trans area....... :skep:

 

You best bet is probably Franklin Mint, if you're willing to invest the $$$. It would be a shame to destroy one of those through modification though!

 

a 30-40 dollar model could save time and money :thumbs:

 

That was my line of thinking... but then I started wondering about the downforce/drag difference of a 2/3 flooboard pan vs a full underbody pan. For sure the first stage is just creating a cap for the floor boards, second being the rear parachute... then the last being a true flat bottom race car! :cheers:

 

Up front I'm wondering about boxing the frame horns, and installing fixed headlights with a lexan cover, getting rid of all the actuators and vacuum lines in the area in the process. Then the farther back you look... like you said the tubular control arms... possibly coil overs just because of less surface area.

Although thats just running gear modifications! I think that for a less drag alternative we either need to box the inner fenders so they are smooth to the air instead of having open back halves... The others that come to mind are smoothing out the undersides of the fenders, and making the leading edge a little bit larger then the rear so ya dont funnel air in behind the tire.

Thats about all that comes to mind, besides putting a decent sized bead of caulk around the chrome trim so ya dont introduce disturbance on the top side of the car.. :jester

 

caulk :lolg: :lolg: :lolg: tape,man tape :lolg: on the trailing edge of fenders
roll them in smooth ,like on funny cars,pro/stock,trans-am etc. look around
the window on a nascar stock-car, smoothed :thumbs:

 

Caulks more permanant! Although tape may have a slight weight savings... :jester

Nah, the top side of the car is pretty slick from the start... its not like a model a ford with the front windsheild or anything... :jester

 

or a T-Bucket street rod,,, cool to cruz, but :bs on the highway

 

:iagree:

 

Here's what I'm gonna do to mine:

 

Looks good, what is that material? I think something glassed in to the exact bumper lines would look great, but would obviously be non-removeable.

 

It's carbonfiber and aluminum...

 

That setup is SLICK!

:cool:

 

Sombody makes a belly pan for the C-2 and C-3. I remember seeing it, and I think Merlin was the one who found it. Can't remember who made it, though- maybe Vanacor?
:yesnod: :chevy :chevy :yesnod:

 

You definitely have some good ideas. I've been kicking around ideas and kind-of working on these kinds of problems (of and on) for about a year now. You've touched on a lot of the issues. Because of the spare tire carrier the rear is what I started working on first. Please excuse the paint cans holding it into place. I only have a preliminary prototype that hasn't even been properly trimmed and fitted. So what you see here is that it is sitting lower on the car than it actually will once it is installed. It is made of carbon fiber.




Once it is mounted there will be testing to see how well it works will respect to both airflow management and downforce.

 

Yeesh, you two. What is the going rate for that much carbon fiber these days?

 

Looks pretty slick! What are ya doing for the leading edge? Rounded off? Sqaure cut? :cool:

 

Carbon fiber is going for (depending on the weight) $16 to $31 a yard.

ZD75blue, at the moment the leading edge is rounded. Once it is in place I will get a better idea of what needs to be blended to have, perhaps, a more gradual transition or a sharp edge. As you know, the air under here is pretty turbulent so subtle edges wont do a lot but it is important to get it going out the back as straight as possible.