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Search: Posts Made By: EcoVan
Forum: EcoModding Central 03-15-2023, 10:54 AM
Replies: 80
Views: 5,372
Posted By EcoVan
That really too bad...

If GM had promoted these vans properly, they probably would have been be quite popular. Dramatically lower cost of operation and huge intervals between refuelings. Full frame for heavy loads and...
Forum: Aerodynamics 10-09-2022, 11:14 AM
Replies: 1
Views: 463
Posted By EcoVan
Full upper grill block on 2007 Jeep Grand Cherokee...Fail

I thought I'd try to get one more aero mod in before winter... the almost always positive upper grill block. I doubted that there would be any issues with cooling since I now had a 2 inch lower air...
Forum: Aerodynamics 07-06-2022, 10:22 PM
Replies: 6
Views: 782
Posted By EcoVan
Did some testing tonight...

And I seem to be getting at least a solid 25mpg and hitting 26 for extended stretches, probably due to some light tail winds.
So far the gains have been:

Closing off the air leaks around the...
Forum: Aerodynamics 07-04-2022, 10:26 AM
Replies: 6
Views: 782
Posted By EcoVan
Less thirsty vehicles...

My 1998 Escort gets around 30 highway ( I just upgraded the injectors, so it may be better now), with my previous 93 Escort was approaching 50 highway My 2017 Chevy Full Size van gets around 30 to...
Forum: Aerodynamics 07-03-2022, 09:17 PM
Replies: 6
Views: 782
Posted By EcoVan
Thank you!

We expect we will be needing to replace this jeep in a couple years and I want to be able to swap the parts on to a Southern California replacement Jeep that I hope to rebuild.
Forum: Aerodynamics 07-03-2022, 05:46 PM
Replies: 6
Views: 782
Posted By EcoVan
New Lower air dam for 2007 Jeep Grand Cherokee

Now that the 2017 Chevy full size van is done, I installed a deeper air dam on our 2007 Jeep Grand Cherokee. The Air dam off the 2015 Ford 4wd pick ups has the exact same front curve as the Jeep,...
Forum: Aerodynamics 07-03-2022, 05:26 PM
Replies: 47
Views: 4,133
Posted By EcoVan
Did some testing last night....

was heavy traffic, which seems to help MPG on the van. I needed to get the alignment corrected and that was taken care of. AT 62 MPH in 7th gear ( of 8) was getting about 33 to 34. At 55MPH was...
Forum: Aerodynamics 06-12-2022, 09:33 PM
Replies: 5
Views: 1,140
Posted By EcoVan
How do you join(fasten) your belly pan materials?

I am mocking up the van belly pan with cardboard and hope to begin the real thing in about a month. I see that pop riveted screw nuts can help fasten materials to the frame/body, but how about...
Forum: Aerodynamics 06-11-2022, 04:48 PM
Replies: 47
Views: 4,133
Posted By EcoVan
Preliminary testing

The van is in need of alignment and maybe a front end part and we need a new NOX #1 sensor, but I did have a chance to run a few miles with the new airdam/valance in place. I appear to have gained...
Forum: Aerodynamics 06-09-2022, 02:35 PM
Replies: 47
Views: 4,133
Posted By EcoVan
Rule of thumbs...

Yes, rule of thumbs are usually bad for scientific advancement. However, as you said, when you get to know your field intimately, patterns emerge and recognizing those patterns often leads to...
Forum: Aerodynamics 06-09-2022, 12:24 PM
Replies: 47
Views: 4,133
Posted By EcoVan
Aerohead, I am curious as to the "rule of thumb"....

Is this the rule of thumb simply " at most covering the low hanging component of the vehicle" or some other mathematically derived number? I could certainly see in my mind's eye that a shorter air...
Forum: EcoModding Central 06-05-2022, 10:41 PM
Replies: 1
Views: 546
Posted By EcoVan
A reminder to you all.. Change those O2 sensors....

We've had my wife's 2007 Jeep Grand Cherokee 4WD 3.7 v-6 for about 4 years, now with about 218,000 miles. Runs great, but I read that O2 sensors get lazy over time. We may have had the original...
Forum: Aerodynamics 06-02-2022, 01:38 PM
Replies: 47
Views: 4,133
Posted By EcoVan
For steady state highway, weight doesn't matter. ...

For steady state highway, weight doesn't matter. Unfortunately most U. S. cars are city drive, so mass would be best addressed.

On the highway, I wouldn't expect a hybrid to be much good..for...
Forum: Aerodynamics 06-02-2022, 12:14 PM
Replies: 47
Views: 4,133
Posted By EcoVan
That pretty much sums it up

I see the same pattern at GM and most other manufacturers. They've have no reason to work on the Express van aero as they are making money as it is and it doesn't effect their corporate MPG. They...
Forum: Aerodynamics 06-01-2022, 08:43 PM
Replies: 47
Views: 4,133
Posted By EcoVan
Here's a side shot of the air dam/valance so you...

Here's a side shot of the air dam/valance so you can see its shape. The upper portion mostly follows the curve of the bumper and the dam is actually the lower portion.

And yes, I know that...
Forum: Aerodynamics 05-31-2022, 12:28 PM
Replies: 47
Views: 4,133
Posted By EcoVan
Increasing drag

I basically was trying to get the dam to shield all the low hanging components and the tires, but no lower. The center is still about 1 1/2 inch above the lowest components and with a belly pan I...
Forum: Aerodynamics 05-31-2022, 12:00 AM
Replies: 47
Views: 4,133
Posted By EcoVan
New lower air dam for 2017 Chevy Full size van

Been looking for an air dam that would work for the van since we bought it. Finally noticed the air dam on the 2015- 2019 Suburban. Picked one up and just installed it. Turned out pretty nice. Its...
Forum: Fossil Fuel Free 07-30-2021, 05:59 PM
Replies: 72
Views: 5,076
Posted By EcoVan
I agree...

Efficiency alone won't eliminate our reliance on fossil fuels. However, what no one seems to ever discuss is that there is a point we can probably return to where the earth's ability to absorb and...
Forum: EcoModding Central 12-31-2020, 06:55 PM
Replies: 44
Views: 5,120
Posted By EcoVan
Biggest vehicle and best mileage of any I have seen.

I have a 2017 Chevy Express full size with the 2.8 diesel we use for boiler service. With our standard vehicle weight around 7500 lbs ( about 2500 lbs of equipment on board) we get about 20 city...
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