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Search took 0.06 seconds. Search: Posts Made By: maczo
Forum: Aerodynamics 06-09-2020, 02:15 AM
Replies: 45
Views: 3,483
Posted By JulianEdgar
I tested a box cavity via pressure measurements...

I tested a box cavity via pressure measurements in the wake.

https://i.postimg.cc/Dw7q0wvX/IMG-0495-lighter.jpg

Test:


Honda Insight
14 degrees C
light, slightly variable winds
Forum: Aerodynamics 05-23-2020, 07:55 PM
Replies: 51
Views: 4,530
Posted By JulianEdgar
Aerohead's theory is that lift is caused by...

Aerohead's theory is that lift is caused by separation, rather than attached flow. He also suggests that well-streamlined bodies have low lift.

However, in fact it is the airflow wrapping around...
Forum: Aerodynamics 05-20-2020, 02:58 AM
Replies: 24
Views: 3,937
Posted By JulianEdgar
The interesting thing about testing is that it...

The interesting thing about testing is that it can show you that what you were quite confident was working, perhaps isn't.

The rear diffuser on the Insight is angled upwards at about 10 degrees,...
Forum: Aerodynamics 04-30-2020, 04:49 AM
Replies: 150
Views: 16,254
Posted By JulianEdgar
I have now made some mock-up aero attachments to...

I have now made some mock-up aero attachments to test for drag variations on the Insight.


Strakes to go in the rear diffuser:
https://i.postimg.cc/JzXTRQcD/DSC-3420.jpg


Side skirts:...
Forum: EcoModding Central 04-05-2020, 08:31 AM
Replies: 46
Views: 6,486
Posted By Frank Lee
All signs point to that piston speed range as a...

All signs point to that piston speed range as a good proxy for when you don't have a BSFC chart.

Years ago I inquired here about optimal piston speed and why wouldn't slower be better (because the...
Forum: Aerodynamics 08-14-2019, 11:42 AM
Replies: 7
Views: 1,337
Posted By aerohead
turning vanes

I don't have the most current literature,but Wolf Hucho,who ran the climatic wind tunnel at Volkswagen for a decade couldn't get any of them to reduce drag.
The only thing he actually ever measured...
Forum: Aerodynamics 08-14-2019, 11:36 AM
Replies: 7
Views: 1,337
Posted By aerohead
roof rack benefit

I've not seen any evidence of it in 45-years of looking.I've seen a lot of evidence to the contrary.
Forum: EcoModding Central 08-29-2018, 08:29 PM
Replies: 432
Views: 81,420
Posted By MetroMPG
But none of those suggestions can be accomplished...

But none of those suggestions can be accomplished with duct tape!
Forum: Aerodynamics 01-25-2015, 11:21 AM
Replies: 67
Views: 18,962
Posted By graysgarage
Automotive Aerodynamics (video series)

Hey guys,

I recently started a video series on automotive aerodynamics. During my research for each episode, I am often directed to this forum. So I thought I'd share my findings, enjoy!
...
Forum: DIY / How-to 11-06-2014, 09:19 AM
Replies: 0
Views: 1,523
Posted By Vekke
How to fasten a Grill Block with Ziptie Plugs

I made a instructional video how you can fasten a grill block to your car with Ziptie Plugs:
https://www.youtube.com/watch?v=pmmZjTcPN9E&feature=youtu.be
Forum: Aerodynamics 08-31-2014, 03:58 PM
Replies: 20
Views: 10,640
Posted By accord_minded
5 Basic Aeromods: A-B-A Test Results

Hi All--

I just ran an A-B-A test on 5 basic aeromods. These are mods that pretty much anyone can do. The full test description is below. But here is the bottom line: by increasing tire...
Forum: DIY / How-to 06-10-2014, 11:06 PM
Replies: 37
Views: 12,658
Posted By some_other_dave
It's also self-machining! After a while, you'll...

It's also self-machining! After a while, you'll wear the bits that the blocks rub against, depositing the trash in your oil. And when you wear through the hardened layer, it all accelerates...
...
Forum: DIY / How-to 05-20-2014, 11:41 PM
Replies: 14
Views: 20,738
Posted By user removed
Now whose communication skills are toilet based.

Now whose communication skills are toilet based.
Forum: EcoModding Central 05-17-2014, 12:34 PM
Replies: 393
Views: 140,885
Posted By user removed
Front panel and sides installed, windshield...

Front panel and sides installed, windshield mocked up in place.

regards
Mech
Forum: EcoModding Central 05-13-2014, 04:23 PM
Replies: 357
Views: 141,464
Posted By The donkey CRX
Reply to Basjoos

I agree that the "Mad Max" type air dam on the front of my VX is more or less a "down and dirty" solution as you stated. I am convinced that if we had done one more like yours we would have seen even...
Forum: The Unicorn Corral 04-23-2014, 01:55 PM
Replies: 35
Views: 6,103
Posted By jakobnev
Next week i'll upload a hypermiling video where i...

Next week i'll upload a hypermiling video where i show how to pee out the sun roof during a long coast.
Forum: Aerodynamics 02-08-2014, 10:12 AM
Replies: 126
Views: 50,054
Posted By MetroMPG
That has a certain look of finality to it. ...

That has a certain look of finality to it.

On the plus side, the frontal area has been optimized.
Forum: DIY / How-to 10-29-2013, 05:04 PM
Replies: 92
Views: 36,950
Posted By Obormot
hello! such system already was in serial...

hello!

such system already was in serial production in Russia many years ago, name "U.O.P.D." (= УОПД in russian).
designed for improving of starting cold engine in extremally low temperatures,...
Forum: Success Stories 10-26-2013, 12:53 PM
Replies: 18
Views: 2,394
Posted By AndrzejM
Filled up

I needed to eat something so I've stopped in Serbia and decided that I'll fill Berta's tank. I wasn't sure that MPGuino's calibration was accurate so didn't know how much fuel left in the tank. And...
Forum: Success Stories 10-03-2013, 11:44 AM
Replies: 30
Views: 8,292
Posted By Diesel_Dave
Yes, P&G will definitely help more on an...

Yes, P&G will definitely help more on an overpowered vehicle (such as my truck).

If you want proof that EOC P&G saves fuel I recently measured my idle fuel rate and found it to be slightly greater...
Forum: Success Stories 06-27-2013, 01:04 PM
Replies: 85
Views: 51,315
Posted By Diesel_Dave
Double kilotank: 2,009.6 mi on one 35 gal tank ('07 Dodge Ram 2500 quad cab)

I filled up this morning and this tank was far far my best ever. A double kilotank--over 2,000 miles on one tank of fuel (2,009.6 to be exact):...
Forum: Aerodynamics 05-30-2013, 11:08 PM
Replies: 172
Views: 58,433
Posted By redneck
Yes. I had a few people ask me questions at...

Yes.

I had a few people ask me questions at rest areas along the way.

One particular person happened to be a truck driver. Japanese I believe. He took several pictures and said he was very...
Forum: Aerodynamics 05-30-2013, 03:03 PM
Replies: 172
Views: 58,433
Posted By redneck
Boat tail - Redneck style...

Well, I couldn't stand it anymore. After seeing the results of the other boat tailed vehicles here on the site, I decided it was time to jump in the pool and join the party...:)

It may not be as...
Forum: EcoModding Central 05-28-2013, 02:37 AM
Replies: 27
Views: 4,858
Posted By Shortie771
Here are a few pics of my EOC kill switch that I...

Here are a few pics of my EOC kill switch that I decided to get a little creative with. I turned an old computer gaming joystick into my shifter by removing all of the un-needed parts and threading...
Forum: EcoModding Central 05-25-2013, 08:31 AM
Replies: 25
Views: 3,017
Posted By jakobnev
I'll be drinking beer today, so no driving....

I'll be drinking beer today, so no driving. :thumbup:
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