Wing thoughts for my pickup...

Whats you got under the hood, 175 N/A thats gettiner done.

641" BBF, C heads by Bennett Performance and tweaked even more by Charlie Evans, Ti valves, Lem Evans custom roller, 16.5 CR, EFI methanol, 5-stage drysump, Star machine vp, sheetmetal intake, Enderle birdcatcher, Alan Dudley MFI system w/EFI, Ignition (individual coil packs), and Datalogging all in one box. PG trans, 4.30 gears, should weigh around 2500 lbs. We scaled it out a few years ago and it weighed 2100 lbs. I expect I'll add another 400 lbs to that with stuff I haven't thought of yet. It has a steel body, but it is butchered big time. We are using aluminum bolts and screws everywhere we can.

OH I see another one if them moonshinner cams.

that sounds like badass engine, nice

we need more pics and a video when its running

Old blue Racin Team wrote:Dman I think i see the tire sticking out the top of the bed

Nah, just enough room so small road kill wont get stuck between the slick & the tub .........

First shop done is with the wing behind the bed at different heights.



The Chassis Shop has a bunch of different spill plate shape/designes to choose from, not just the retro looking one pictured.

Second shop is with the wing in the bed at different heights.

Hey, David: Yer gonna put yer eye out with that wing (LOL)! Why not move the wing into the pick up bed just a couple of inches behind the center line of the differential, and high enough to keep it above the wind coming over the roof of the truck ???? Just seems right to me!

Wayne (SAWDOFF) Pearce

Wayne Pearce wrote:Why not move the wing into the pick up bed just a couple of inches behind the center line of the differential

Because the farther behind axle center line you mount the wing, the greater the down force numbers will be for a set wing angle of attack because the leverage increases. As you move the wing closer & closer to the axle centerline, more & more wing angle of attack has to be adjusted in (and thus more & more air drag) just to generate the same down force numbers the wing would if mounted farther back.

I'm thinking top right is where you are going to find the air that you are looking for.

I'm going to remove the rear spoiler and install chassis tabs on the top frame rail behind the rear axle. If I feel I need a wing, I'm going to come off those tabs with a dragster wing 48" wide with the back of it even with the tailgate and the top will be even with the cab or maybe a little taller. I don't like the looks of anything hanging off past the tailgate.

Messing with a basic wind tunnel applet site and a badly drawn truck roof/covered bed outline. I couldn't draw a straight line with the mouse for $hit.
The tumbling dead air boundary layer right behind the cab really stretches out as air speed increases.

Looks good to me.

At roughly what air speeds are those graphics taken from Dave...? Very interesting...









Doug...

Hey Doug, your truck really looks good! I noticed you don't have a front bumper. I didn't run one on mine until I found someone to make me one. The guy is in NC and he built mine in fiberglass off of my original bumper. It probably weighs 3-4 lbs tops. I can get you hooked up if you need one.

Although at the moment I can not find the CD there is a good white paper put out by the SAE years ago that details the air flow on a (Ford) PU into and through the bed. I'll keep looking so that I can at least give the paper number. In my reading and my testing I found results similar to your graphics. Got a link to that applet?