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Search took 0.01 seconds. Search: Posts Made By: ProDarwin
Forum: General Efficiency Discussion 10-06-2013, 04:40 PM
Replies: 13
Views: 2,151
Posted By ProDarwin
One problem I've always had with hypermiling is...

One problem I've always had with hypermiling is that #1 and #5 are almost mutually exclusive. While you are creeping toward the light at 5-10mph, everyone behind you waiting to go right (or left) is...
Forum: General Efficiency Discussion 06-27-2012, 06:58 AM
Replies: 59
Views: 9,315
Posted By ProDarwin
Depends on the trip. I recently drove back...

Depends on the trip.

I recently drove back from San Diego to D.C. I averaged approx 70 mph, maybe a bit higher. The added time by reducing speed to 50mph (15 hours) would've cost me an extra day...
Forum: Aerodynamics 06-07-2012, 05:36 PM
Replies: 56
Views: 28,654
Posted By ProDarwin
The easy button here would just be to trigger...

The easy button here would just be to trigger them off the engine fan. When fan comes on, shutters open. Fan goes off, they close.
Forum: EcoModding Central 05-12-2012, 09:12 AM
Replies: 94
Views: 27,863
Posted By ProDarwin
No. The mixture stays at 14.7 (or however close...

No. The mixture stays at 14.7 (or however close your factory ECU can hold it to this number). It takes a mass X of air to make Y power. The warmer the air, the higher the volume. The higher the...
Forum: General Efficiency Discussion 05-09-2012, 11:02 AM
Replies: 16
Views: 2,442
Posted By ProDarwin
Agreed. Some on this forum don't seem to...

Agreed. Some on this forum don't seem to experience this :(

Of the 11 stops on my commute to work, there are 0 I could coast to a stop at without enraging the occupants of cars behind me. 10 of...
Forum: Forum News & Feedback 04-27-2012, 12:01 PM
Replies: 75
Views: 10,105
Posted By ProDarwin
YOU'RE WRONG! J/k. IMO, There is nothing...

YOU'RE WRONG! J/k.

IMO, There is nothing wrong with telling someone they are wrong - especially if you have the knowledge/background/data to back up your claim. People are often wrong (myself...
Forum: EcoModding Central 04-23-2012, 10:32 AM
Replies: 284
Views: 46,263
Posted By ProDarwin
You are missing the point. Any good inventor or...

You are missing the point. Any good inventor or engineer will have data - even a simple ideal scenario calculation - to back up his experiment before proceeding to the prototype stage. They would...
Forum: EcoModding Central 04-19-2012, 01:04 PM
Replies: 284
Views: 46,263
Posted By ProDarwin
A variation on #2 that is also proven is...

A variation on #2 that is also proven is turbo-compounding.

#3 is home-built used often on this site.


There are many other methods that have also been proven effective, however they have not...
Forum: EcoModding Central 04-17-2012, 10:34 PM
Replies: 284
Views: 46,263
Posted By ProDarwin
Well, to be fair, you are cooling more than the...

Well, to be fair, you are cooling more than the exhaust. Both the Crower Six-Stroke (2006) and the Dyer Six-Stroke (1915) were able to run without a cooling system as well :)

In reference to your...
Forum: EcoModding Central 02-22-2012, 07:05 PM
Replies: 10
Views: 7,735
Posted By ProDarwin
Regarding coatings, the ABS used by most FDM...

Regarding coatings, the ABS used by most FDM printers can be "blended" using a paint brush and acetone, it melts/welds the surface together making it significantly stronger and smoother. It takes a...
Forum: EcoModding Central 02-21-2012, 11:32 PM
Replies: 10
Views: 7,735
Posted By ProDarwin
Yes and no. As a Mechanical Engineer who...

Yes and no.

As a Mechanical Engineer who uses CAD all day with extensive experience in 3D printing (I owned my own printer at one point), I offer this: You could use it to test, but not as a...
Forum: Aerodynamics 02-18-2012, 03:39 PM
Replies: 23
Views: 7,615
Posted By ProDarwin
+1 to the Saturn suggestion. The S-series, ION,...

+1 to the Saturn suggestion. The S-series, ION, L Series and VUE can be driven without any of the body panels. On the S-series, even the roof can be unbolted - it is not a structural piece. On the...
Forum: Aerodynamics 02-16-2012, 09:59 PM
Replies: 46
Views: 21,081
Posted By ProDarwin
You do realize that on many of the slammed cars,...

You do realize that on many of the slammed cars, the tires don't actually contact the fenders or the suspension, right? (ignore the joke VW with 20 deg of negative camber. The only rub is usually at...
Forum: General Efficiency Discussion 02-15-2012, 10:09 PM
Replies: 59
Views: 7,134
Posted By ProDarwin
Agreed, but if you upgrade the tires to be...

Agreed, but if you upgrade the tires to be significantly stickier, upgraded pads would help as well.
Forum: Off-Topic Tech 01-23-2012, 11:27 PM
Replies: 26
Views: 7,185
Posted By ProDarwin
An Iphone4. Cost = $0 for video (already had...

An Iphone4. Cost = $0 for video (already had one). $15 and you can get Harry's Lap Timer, which will allow you to datalog OBD2 information alongside/overlayed on the video using a PLX OBD Wifi (PLX...
Forum: General Efficiency Discussion 01-18-2012, 09:38 PM
Replies: 25
Views: 7,071
Posted By ProDarwin
You guys are confusing un-sprung weight with...

You guys are confusing un-sprung weight with un-sprung mass. Most of the time the terms are interchangeable, but even if you somehow achieved negative weight, the mass is what matters.

Anyway, on...
Forum: EcoModding Central 01-16-2012, 01:35 PM
Replies: 70
Views: 15,181
Posted By ProDarwin
Its pretty significant. Look at a P-V diagram of...

Its pretty significant. Look at a P-V diagram of the Diesel Cycle and the Otto Cycle side by side (especially at part throttle). The lower "loop" of the Otto cycle is pumping losses.
...
Forum: EcoModding Central 01-13-2012, 06:42 PM
Replies: 19
Views: 11,548
Posted By ProDarwin
215/70-R15 is slightly taller (approx .2") ...

215/70-R15 is slightly taller (approx .2")

the width (215) * the aspect ratio * 2 will give you the height. 215 x .70 x 2 = 301mm or 11.85"

Add that to the wheel diameter (16") to get the...
Forum: General Efficiency Discussion 01-02-2012, 08:05 PM
Replies: 17
Views: 5,734
Posted By ProDarwin
Did you check the Engine Coolant Temp Sensor? ...

Did you check the Engine Coolant Temp Sensor? There are two on your car, one for the gauge, one for the ECU. These are notorious for causing all sorts of wonky issues when they fail.
Showing results 1 to 19 of 19

 
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