So, after my suburban aero idea, I decided to not do anything to it. it got decent enough mpg just by being tuned up and having the tires inflated to max sidewall psi. and when I upgraded to 35's, I used the stock wheel which tucked the big tires in nicely.
Anyways, I am going to start on a new project here that is much much larger and Im much more willing to cut, and weld and rivet all over it. unlike the suburban which was slightly restored and just in too nice of condition.
this is not the one I'll be getting, but it looks very similar. but mine will not have an extra wide flat bed with a headache rack. its just a flat bed with boxes underneath.
1960's GMC 4000. 305 V6. 4 speed manual with 2 speed rear end. it's also using single rear wheels, thankfully. I dont need a dually. I may change the engine for a small block chevy 350, or a caddilac 500 that are further detuned for extremely low rpm usage. I have been searching for BSFC charts for either one.
So i want to build a stake side that is in a kamm back shape, add wheel skirts and deflectors. remove the front windshield visor. aero-ize the bumpers. Lower it a few inches. etc. I'm open to all ideas. I will be constructing everything out of thin sheet metal or wood. I want it to be very extreme and i'm not opposed to cutting anything or adding anything for the sake of aero.
Other things like putting clear plastic over the grill and headlights or just making a flat metal piece to block it all. and the "hood vents"
Ill also be removing the huge mirrors and putting tiny little 3" circles mounted on the door.
I am very curious about using the exhaust gas flow to maybe promote a bettter airflow. especially with a large engine pumping a lot of air, would stacks with the exhaust pointed into a Kamm-Back airflow shape help? Or maybe have the exhaust go into a plenum then divert it under the vehicle to help air flow around the massive rear axle and drivetrain pieces?
that also reminds me of this question: Would putting a tear drop shape on the back of the axle tubes help much? would it be better to have an air dam that goes close to the ground, or would it be better to build a flat bottom on a truck of this size?
I do want the large pieces to be removable out back so i can tow a 5th wheel.
I'm still researching other mods like hot air intake, an extremely mild camshaft. electric accesories etc.
I can do a lot of custom metal work easily, and this is the perfect platform to work off of. The cargo capacity is not that important to me. I'll be building a severely oversized stake side setup for hauling trash to the local dump. the aero setup will be for my own satisfaction, and hauling things like engines and chassis parts between cities.
THE COMPLETE OPPOSITE OF THIS:
