Front splitter Rear spoiler

[cornfedbill]

I'm real curious how much back pressure and turbulence is at the windshield base. We may delay cutting holes in the hood until we know where they need to be, or at least where they shouldn't be. We've been told at least 12" forward of the base but that was based on S10 which doesn't have nearly as steep of a windshield as the earlier trucks. I will most definitely be messing around with different things on #ctwin.

-J

I would be very interested to understand what the holes in the hood do for downforce. The hood on my old Vega with a very large air dam that nearly dragged on the ground had a significant pressure differential. It was enough (the hood opens in the rear) to compress the hood spring at highway speeds. Holes in the hood may balance the pressure and reduce downforce.



It depends if the goal is to reduce drag or to increase downforce. The Laws of Physics do not allow us to do both. If you are autocrossing, I would guess that downforce is king.

[Sales-TCI-Eng]

I would be very interested to understand what the holes in the hood do for downforce. The hood on my old Vega with a very large air dam that nearly dragged on the ground had a significant pressure differential. It was enough (the hood opens in the rear) to compress the hood spring at highway speeds. Holes in the hood may balance the pressure and reduce downforce.

It depends if the goal is to reduce drag or to increase downforce. The Laws of Physics do not allow us to do both. If you are autocrossing, I would guess that downforce is king.

We're planning on going 200mph with it so drag is a major concern.

I'm just trying to keep any unused air from entering the engine compartment. Planning on sealing the intercooler to the core support, the radiator to the intercooler and the hood vents to the radiator. The radiator will be laid over roughly 45 degrees though.

Oh and it will have a belly pan.

[cornfedbill]

We're planning on going 200mph with it so drag is a major concern.

I'm just trying to keep any unused air from entering the engine compartment. Planning on sealing the intercooler to the core support, the radiator to the intercooler and the hood vents to the radiator. The radiator will be laid over roughly 45 degrees though.

Oh and it will have a belly pan.

Okay. That makes sense. Then I would consider covering only the rear half of the bed like GMC did. They spent a lot of time in the windtunnel.

If it were me, I would have a long spoiler hanging off the rear with very little angle to it to get the air to flow smoothly off the rear.

Take a look at this example. The taillights make it look like the spoiler is part of the bed. Actually it hangs rearward quite a bit.