Another truck aero cap idea...

[Sven7]

Those surfaces look great. I never thought to take the cab crease straight back in lieu of a triangular prism. More complicated surfaces but man is it sweet. If you do the stretched cloth I'll be very interested to see how it comes out!

[Big Dave]

It does look sweet.

We are all glad you are finding out what does and doesn't work.

Now, if you could taper in the plan view from the wheel wells back.

[BamZipPow]

Originally Posted by NeilBlanchard

So, the only change was the cap and you are seeing ~26.2MPG vs ~21MPG for your 90 day average? If so, then you are seeing almost a 25% improvement just for the cap?

You are doing something right!

Well...the numbers fer the past 90 days were fer mostly city driving. This current run is one of my long distance drives I make during the year. I think last year's drive was 27mpg leaving out of Houston with the pool noodle mustache. The drive from Ardmore to Wichita was about 25mpg. That was with the 2nd iteration of the aero cap as well as a few other aero attempts.

As I refine my aero cap attempt...it is rather interesting to see how my skill set progresses and what sort of technology I'm able to acquire and put into play.

[ECONORAM]

BZP, very nice work. Wish I could do something similar to that with my topper without the wife going postal...

[BamZipPow]

Originally Posted by ECONORAM

BZP, very nice work. Wish I could do something similar to that with my topper without the wife going postal...

Since my wife doesn't drive my truck...she doesn't say anything bad about it.

If you were closer...I'd try to help you on building one.

Does yer pickup have a rear window opening or is it sealed shut?

[ECONORAM]

My truck has a rear slider; I do like it. It can be useful. I can't even change the decorations hanging from the rear view mirror with a comment...
Hmm, looking at your avatar. The airdam is pretty deep, makes me think maybe I should extend mine...or just lower my belly panel kit another inch.
Wonder if I now have enough posts to add an avatar picture?

[BamZipPow]

Originally Posted by ECONORAM

My truck has a rear slider; I do like it. It can be useful. I can't even change the decorations hanging from the rear view mirror with a comment...
Hmm, looking at your avatar. The airdam is pretty deep, makes me think maybe I should extend mine...or just lower my belly panel kit another inch.
Wonder if I now have enough posts to add an avatar picture?

You should be able to add an avatar piccie anytime...

Here's my modified air dam thread...
Modified air dam... - Toyota Nation Forum : Toyota Car and Truck Forums

...and my belly pan thread...
Under belly pan... - Toyota Nation Forum : Toyota Car and Truck Forums

[ECONORAM]

Instead of extending my air dam lower, I previously tried mounting a second 2" tall air dam about 4 inches back from my front bumper and under my splitter setup, but my fuel mileage was worse. I noticed the truck does better with my splitter and the belly panels in a slight angle down to cover the front lower frame...a little bit like the 1969 Charger Daytona, but not nearly so great looking and pointed. My next thought is to mount some 2x2s the length of the truck to mount my panels to, and just make the curve at the front a little longer up to my splitter.
I am curious as to why the end of your panel kit is not angled/curved up to be a more aerodynamic kind of tailcone? Does it make a difference?
[edit] but this thread is about aerocaps. Sorry for the hi-jack

[BamZipPow]

Originally Posted by ECONORAM

I am curious as to why the end of your panel kit is not angled/curved up to be a more aerodynamic kind of tailcone? Does it make a difference?
[edit] but this thread is about aerocaps. Sorry for the hi-jack

You mean my rear diffuser? Or the rear side skirts?

Well...my frame mounted hitch would sort of prevent that as the back end of the rear side skirts are bolted to the width of the rear hitch bar. I previously have attached some rear strakes from the rear mud flaps and curved those to the width of the rear skirts. Got my best MPGs last year from doing that along with partial rear wheel skirts. Gonna expand on that some more this year fer my summer long distance drives...

You can see how the rear strakes are rounded in...
My attempt at an aero cap... - Page 5 - Toyota Nation Forum : Toyota Car and Truck Forums

[BamZipPow]

Added some lawn edging in between the front air dam belly pan and the engine bay belly pan. Gonna see if this makes a difference...clearance to the ground is approximately 3".



Added in some extra supports fer the rear part of the aero cap. It would move up/down when I would open the hatch. Makes it difficult to open the tail gate when that happens...

These are just temporary supports until I figure out how I want them. They have to be removable at a moment's notice fer loading of wider cargo...