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Forum: EcoModding Central Yesterday, 06:49 PM
Replies: 16
EGR
Views: 222
Posted By Ecky
I've seen most of the fuel economy improvements...

I've seen most of the fuel economy improvements happen (at least from GM) in the late 00's and later. Much of this seems to come from finally adopting tech like VVT, finer engine control, etc.
...
Forum: EcoModding Central Yesterday, 02:43 AM
Replies: 16
EGR
Views: 222
Posted By Isaac Zachary
Contrary to popular belief, swirls are bad for...

Contrary to popular belief, swirls are bad for fuel mileage. All they do is fling the gasoline out of the air causing separation of fuel and air, the exact oposite of what we think they do.

It's...
Forum: Aerodynamics Yesterday, 12:26 AM
Replies: 22
Views: 725
Posted By Piotrsko
To my limited knowledge, I have not seen a...

To my limited knowledge, I have not seen a minimum size required in rear view mirrors in any jurisdiction...... In Cali, dental mirrirs have been used for decades. Couple that with a camera/monitor...
Forum: EcoModding Central 05-05-2024, 06:02 PM
Replies: 16
EGR
Views: 222
Posted By Ecky
Good information, @Isaac Zachary. I'll add...

Good information, @Isaac Zachary.

I'll add a few bits:

As you say, atmospheric air is effectively inert, though EGR has far less oxygen in it to combine with nitrogen, so it naturally produces...
Forum: Aerodynamics 05-05-2024, 12:14 PM
Replies: 1,312
Views: 164,905
Posted By freebeard
Odd, but optimal (for what it is):...

Odd, but optimal (for what it is):...
Forum: Aerodynamics 05-05-2024, 09:02 AM
Replies: 1,312
Views: 164,905
Posted By Piotrsko
Trabant parade ( more than 3 running...

Trabant parade ( more than 3 running consecutively)
Forum: Aerodynamics 05-05-2024, 08:56 AM
Replies: 1,312
Views: 164,905
Posted By Piotrsko
Saw in VW museum (betcha @aerohead wont see much...

Saw in VW museum (betcha @aerohead wont see much wtong with it)
Forum: Off-Topic Tech 05-05-2024, 12:35 AM
Replies: 1,534
Views: 223,848
Posted By Piotrsko
Top should have only two issues, at least for me:...

Top should have only two issues, at least for me: some idjiot got too excited torquing the driver side and rounded the nut requiring a 6 point shorty socket. The other one for me: passenger side...
Forum: General Efficiency Discussion 05-04-2024, 07:56 AM
Replies: 12
Views: 293
Posted By Logic
The Speed of Air guys do carry on about how the...

The Speed of Air guys do carry on about how the dimples' size, shape and position is based on the say so of some or other aero software, saying that you can't just put any old dimple anywhere.
I too...
Forum: The Lounge 05-04-2024, 12:39 AM
Replies: 27
Views: 1,755
Posted By Piotrsko
Need a skin that tolerates, afaik 2500 degrees F....

Need a skin that tolerates, afaik 2500 degrees F. Aluminum gets all wonky at 1300. High nickle stainless is traditionally used.
Forum: The Lounge 05-04-2024, 12:33 AM
Replies: 547
Views: 29,327
Posted By Piotrsko
That explained a lot.

That explained a lot.
Forum: The Lounge 05-03-2024, 04:18 PM
Replies: 278
Views: 11,416
Posted By Isaac Zachary
AA brand cylinder and cylinder sets are top...

AA brand cylinder and cylinder sets are top notch. Their stock 1,600 cc set is what I got for my Bug and they are high quality. Many have said that they are higher quality than the Mahle cylinders....
Forum: General Efficiency Discussion 05-03-2024, 02:10 PM
Replies: 12
Views: 293
Posted By Logic
These dimples (size position etc) are most likely...

These dimples (size position etc) are most likely based on software developed by a Sal Rodriguez of Sandia National Labs.

New topic here:...
Forum: The Lounge 05-03-2024, 02:07 PM
Replies: 547
Views: 29,327
Posted By freebeard
So I thought I'd watch the Scottster, but around...

So I thought I'd watch the Scottster, but around 1:07 he said something and when I went to turn on the transcript, it kicked me to his home page.

Best comment so far "robot buster -- Belle...
Forum: Aerodynamics 05-03-2024, 02:06 PM
Replies: 4
Views: 164
Posted By Logic
You need this software before dimples work

Sal Rodriguez a nuclear engineer at Sandia National Labs came up with software where you input:
1: Your shape. (eg: car body)
2: The 'fluid' (air) its moving through.
3: The speed at which its...
Forum: EcoModding Central 05-03-2024, 01:49 PM
Replies: 16
EGR
Views: 222
Posted By Isaac Zachary
Lean burn at full throttle, like leaner than...

Lean burn at full throttle, like leaner than 12:1, can damage the engine.

But most engines run at a stoichiometric AFR when not warming up and when not being floored. Stoichiometric is the hottest...
Forum: The Lounge 05-03-2024, 01:11 PM
Replies: 547
Views: 29,327
Posted By Piotrsko
Feels like the '70's once again, only the fuzz...

Feels like the '70's once again, only the fuzz was too nice fer a change. Skip a generation and the youngins gotta redo everything we did, but worse and wrong. Seriously, Columbia? Really? West...
Forum: EcoModding Central 05-02-2024, 05:41 PM
Replies: 479
Views: 130,698
Posted By freebeard
Good rant. It started in the 1940 or 50s...

Good rant.

It started in the 1940 or 50s when the Barris Brothers educated Detroit, then Sam died and George turned to Hollywood. =(

My current candidate for productizing is the Plasmoid...
Forum: Events & Meet-ups 05-02-2024, 04:37 PM
Replies: 1
Views: 94
Posted By arcosine
HPV races may 4th major tayloe velodrome, indy

https://hosting.photobucket.com/images/g277/cfbb/IMG_3402.png
Forum: Aerodynamics 05-02-2024, 11:45 AM
Replies: 1,088
Views: 258,032
Posted By aerohead
' Bam's trailer '

Bam's trailer is hinged to a transverse spar, welded to the 2-inch 'male' pipe which engages the receiver hitch.
It articulates in 'pitch', dampened by duel air-springs.
Forum: EcoModding Central 05-02-2024, 09:23 AM
Replies: 479
Views: 130,698
Posted By pgfpro
I find it very amusing that people tell me my...

I find it very amusing that people tell me my pre-chamber won't work because of this or that. lol Even some F1 engineers on a forum I visit frequently don't believe. They tell me you don't have...
Forum: Alternative Transportation 05-02-2024, 09:06 AM
Replies: 48
Views: 12,097
Posted By MetroMPG
It's actually a center stand - the left side of...

It's actually a center stand - the left side of it is hidden behind the right.

Same kind of stand as on the old CCM:
...
Forum: Aerodynamics 05-01-2024, 06:48 PM
Replies: 1,088
Views: 258,032
Posted By freebeard
BamZipPow's example is not articulated. I've...

BamZipPow's example is not articulated.

I've only seen one-wheel articulated trailers on motorcycles.
Forum: Aerodynamics 05-01-2024, 06:37 PM
Replies: 22
Views: 725
Posted By freebeard
...if you follow the recipe; it's difficult to...

...if you follow the recipe; it's difficult to respect ingress/egress, breakover angles and worst of all, rear view mirror requirements.
Forum: Aerodynamics 05-01-2024, 11:54 AM
Replies: 1,088
Views: 258,032
Posted By Logic
Erm... If you want to make an articulated 1...

Erm...

If you want to make an articulated 1 wheeled trailer (no castor wheel) your 'tow hitch should be a universal cross as found in driveshafts on rear wheel drive cars.

Now you have the...
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