Some deep thinking on getting Best MPG in a VAN

[racprops]

Here is my test gear:

[racprops]

Later when I gave up most MPG testing I fixed the car up:

[racprops]

I have problems with the engine SO I am planing on a engine/transmission and FRAME swap from a 2000 to a 2004 drive line with a full frame swap.

[freebeard]

...from earlier today.

I think I will need pictures of most of these ideas.

The search field is in the upper right. I apologize for being lazy.

• diverter...stagnation point
• air curtains...spats.
• Aerocivic
• fender skirts...TurnpikeCruiser
• fiberglass...the proper curve.

You've already got vortex generators on the back. Aren't they working? See Gurney flap. Since you went thumbs down on the boat tail, I'll include a picture for that.



The proportions would change for your vehicle. It could have a piano hinge at 18-24" and dispense with the 'stinger' that stores over the roof in this instance.

It might have a vertical hinge at one end of the bumper and a retractable leg with a caster wheel on the other.

Here's another thing:



Which topper has the lowest Cd?

The slick-top is 0.44, The bubble-top is 0.40 because of the arched profile. The area is larger, of course. You'd need only do the back half. Those divots in the front are facing onrushing air. "It isn't how big a hole you make, it's how big a hole you leave."

[racprops]

Interesting, my van is closes to #4 the dark blue and white van in profile.

[racprops]

Note she rises in front and tapers down in back and has a rounded shape. The roof rack is side rails only no cross rails at all.

I also replace the window doors with solid doors.

Rich

[ennored]

Originally Posted by racprops

I was going to use the factory unit...

Make it a piggy back set up.

Rich

To my knowledge no one has done that yet. Even the 6 speed controllers that are out there need to be paired with a stock type engine controller so it can talk back and forth. And the 8 speed is much more sophisticated in how it controls the engine torque through a shift. The Chevrolet Perfomance crate 8 speed transmissions can only be used behind a crate LT1 or LT4 engine.

[19bonestock88]

I’m absence of being able to use the 8L90 trans, why not try and swap an NV4500? Or if you wanted to be spendy, you could find a T-56 with the 0.50 OD...

[racprops]

Originally Posted by ennored

To my knowledge no one has done that yet. Even the 6 speed controllers that are out there need to be paired with a stock type engine controller so it can talk back and forth. And the 8 speed is much more sophisticated in how it controls the engine torque through a shift. The Chevrolet Perfomance crate 8 speed transmissions can only be used behind a crate LT1 or LT4 engine.

That is my plan, pair it with my older OBDI PCM sharing most sensors.

I note you say "The Chevrolet Performance crate 8 speed transmissions" so is there a non performance version??

Can you share more information on these Transmissions??

Rich

[racprops]

Originally Posted by 19bonestock88

I’m absence of being able to use the 8L90 trans, why not try and swap an NV4500? Or if you wanted to be spendy, you could find a T-56 with the 0.50 OD...

Looked it over and what a beast....

Again I will stay with a auto...

I have also considered the 6L80....