Hood Extractor for Downforce

[Tremonte986]

You could easily use a voltage divider circuit from the VSS / wheel speed sensor to feed a speed reference into the arduino. From there, map an output to a relay on/off at whatever speed you want to deploy and retract. No gps lag then.

[torch02si]

I love this project!

Is there any thought to create a slight ridge on the leading edge of the vent? Most motorsport-oriented vents I have seen are slightly "proud" of the plane of the hood. I gather that this creates a small vortex which aids in extraction.

Have a look at modern cars like a McLaren P1, or more basic executions like the original racing GT40s.

[Racer Boy]

Originally Posted by torch02si

I love this project!

Is there any thought to create a slight ridge on the leading edge of the vent? Most motorsport-oriented vents I have seen are slightly "proud" of the plane of the hood. I gather that this creates a small vortex which aids in extraction.

Have a look at modern cars like a McLaren P1, or more basic executions like the original racing GT40s.

That would be very effective, and would lessen the need for such a large duct like truegearhead has made. The same thing on the leading edge of the front wheel wells will give you similar results.

Just those two modifications would help lessen lift, which many people call adding downforce. It isn't adding downforce, of course, but if you eliminate 200 lbs of lift, it's the same as adding 200 lbs of downforce.

[itsnotanova]

This was at COTA this weekend. I didn't see any movable flaps on it

[steved0x]

Originally Posted by Tremonte986

You could easily use a voltage divider circuit from the VSS / wheel speed sensor to feed a speed reference into the arduino. From there, map an output to a relay on/off at whatever speed you want to deploy and retract. No gps lag then.

Oh yeah that would be a lot easier/better than adding a GPS I am following this so I can learn new things. Since I only have experience with arduino GPS projects that's what everything looks like to me