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Forum: Aerodynamics 09-17-2020, 04:26 PM
Replies: 34
Views: 9,084
Posted By JulianEdgar
If you were to go bigger with the front undertray...

If you were to go bigger with the front undertray (including filling some of the front wheel air exit openings), you'd then find that radiator cooling flow starts to decrease. That's what happened...
Forum: Aerodynamics 09-17-2020, 02:10 PM
Replies: 34
Views: 9,084
Posted By samwichse
After installing the Scott's solid metal...

After installing the Scott's solid metal undertray on my Insight (instead of the two smaller pieces that cover 1/3 of the area under the engine each), I found the car took longer to warm up and had a...
Forum: Aerodynamics 05-25-2020, 05:58 AM
Replies: 35
Views: 10,763
Posted By JulianEdgar
None of my references support that assertion. In...

None of my references support that assertion. In fact, the car had measurable downforce - 136kg at 240 km/h.

I do wish people wouldn't post stuff that isn't true.
Forum: Introductions 01-05-2020, 08:15 AM
Replies: 42
Views: 14,985
Posted By Dizono
We've thought about that, but a computional fluid...

We've thought about that, but a computional fluid dynamics model suggests that a further extension has only minimal gains. So Wunibald Kamm was right :D

https://i.imgur.com/dy9SuTh.jpg
...
Forum: Introductions 01-03-2020, 04:43 AM
Replies: 42
Views: 14,985
Posted By Dizono
The Dutch 100MPG(?) Peugeot 106

Hi All,

Years ago I stumbled upon this website and the idea of eco tuning a car stuck. Together with a friend, we finally found a good reason to do it. For a major Dutch magazine, we're...
Forum: EcoModding Central 02-23-2017, 08:23 PM
Replies: 104
Views: 34,896
Posted By redpoint5
I don't have specific answers to your questions,...

I don't have specific answers to your questions, but from my experience, Supercaps are super bad at handling both the grid heating, and immediately after, starting my 5.9L Cummins engine.

It all...
Forum: EcoModding Central 01-26-2017, 02:34 AM
Replies: 104
Views: 34,896
Posted By redpoint5
You didn't even mention the primary advantages of...

You didn't even mention the primary advantages of lithium-ion batteries:

1. Weight savings due to much higher energy density

2. Space (volume) saving due to much higher energy density

That...
Forum: The Unicorn Corral 01-20-2017, 05:21 PM
Replies: 29
Views: 9,954
Posted By Mrmacireland
Dia duit I work on wind turbines they have...

Dia duit
I work on wind turbines they have large capicitors to even out the grid load they really do have serious storage potentional power in them what you need is a way to charge them up take out...
Forum: EcoModding Central 01-10-2017, 12:01 PM
Replies: 104
Views: 34,896
Posted By Enki
Not very well. Cap banks can supply a lot of...

Not very well. Cap banks can supply a lot of instant amperage but the voltage drops off quickly at high loads. Think about it like this: Each cap in my 500 farad cap bank (huge; they are 2.7v 3000...
Forum: EcoModding Central 01-09-2017, 01:30 PM
Replies: 104
Views: 34,896
Posted By redpoint5
My guess is that either your balance circuit or a...

My guess is that either your balance circuit or a defective cap is placing too much parasitic draw on your battery, which then damaged it (your AGM might have a short). You shouldn't be losing so...
Forum: EcoModding Central 01-09-2017, 11:29 AM
Replies: 104
Views: 34,896
Posted By ECONORAM
I was about to ask if a solar charging panel...

I was about to ask if a solar charging panel would work instead of another battery. Would you need a voltage regulator in the circuit for sunny days?



Didn't know that. Good to know as I'm...
Forum: EcoModding Central 01-02-2017, 11:50 PM
Replies: 104
Views: 34,896
Posted By Harlan
I've been running a bank of 3000F 2.7v Super Caps...

I've been running a bank of 3000F 2.7v Super Caps in place of my battery for a while on my car. The only issue is the standby drain is so high that it will only last a few days on the capacitor...
Forum: The Unicorn Corral 06-10-2014, 05:28 PM
Replies: 29
Views: 9,954
Posted By ecomodded
I think the real benefit in the Caps in this...

I think the real benefit in the Caps in this situation is that they do not store unneeded energy continually recharging a battery with excess power that you will never use.
Where as in the...
Forum: The Unicorn Corral 06-10-2014, 04:39 PM
Replies: 29
Views: 9,954
Posted By cekic
@redpoint5: Hi, that’s true that batteries can be...

@redpoint5: Hi, that’s true that batteries can be replaced with the Ultra caps but modern ultracaps still have many disadvantages over traditional batteries like the capacitors are good to provide...
Forum: The Unicorn Corral 05-24-2014, 08:30 PM
Replies: 29
Views: 9,954
Posted By Cobb
Well Red, with the gen 2 insight it cycles the dc...

Well Red, with the gen 2 insight it cycles the dc to dc converter from the ima system off and on to charge the 12 volt system under regen and when the voltage falls below 12.5. Ive had some...
Forum: The Unicorn Corral 05-23-2014, 09:17 PM
Replies: 29
Views: 9,954
Posted By redpoint5
There is likely an unmeasurable fuel savings by...

There is likely an unmeasurable fuel savings by using Ultracaps instead of a conventional battery, but that's beside the point. The question in this thread asks if a battery can be replaced by a...
Forum: The Unicorn Corral 05-23-2014, 05:55 PM
Replies: 29
Views: 9,954
Posted By ConnClark
There is no real data that says it has saved any....

There is no real data that says it has saved any. That is why its here


Capacitors have an exponential discharge characteristic which leads to I^2 * R losses as they discharge. Batteries have a...
Forum: EcoModding Central 01-08-2014, 11:13 PM
Replies: 104
Views: 34,896
Posted By redpoint5
First Supercapacitor Battery

I purchased 6x 2.7 volt 400 farad supercapacitors from Digikey (http://www.digikey.com/product-detail/en/XV3560-2R7407-R/283-4209-ND/3878067)for $77.66 including shipping :eek: Above 400F, the price...
Forum: EcoModding Central 01-08-2014, 10:57 PM
Replies: 104
Views: 34,896
Posted By mechman600
I too was fascinated by that thread....

I too was fascinated by that thread. Unfortunately I had JUST put a new battery in my wife's Toyota Matrix.

Maxwell Technologies sells a group 31 ultra-capacitor for heavy duty trucks. Normally,...
Forum: EcoModding Central 01-08-2014, 10:25 PM
Replies: 104
Views: 34,896
Posted By redpoint5
Supercapacitor Battery Replacement

My quest to replace conventional lead-acid car batteries with supercapacitors was inspired by this (http://ecomodder.com/forum/showthread.php/replace-your-car-battery-capacitors-26363.html)thread. I...
Forum: Aerodynamics 07-04-2010, 07:39 PM
Replies: 19
Views: 13,119
Posted By 4536
Grill Block Summary

Have read alot of the threads on Grill Blocks. Does the following Summary of Grill Block Priorities sound right? (I'm going on memory here.)

1. If you have 2 grills, Block the upper first. This...
Forum: Aerodynamics 02-25-2009, 07:27 PM
Replies: 35
Views: 10,763
Posted By Daveedo
As for the undertray it seems as though the...

As for the undertray it seems as though the amount of benefit is dependent upon how high your car is and how rough the underbody is. If your car sits low to the ground already then the undertray may...
Showing results 1 to 22 of 22

 
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