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Search took 0.12 seconds. Search: Posts Made By: serialk11r
Forum: EcoModding Central 10-02-2023, 03:53 PM
Replies: 11
Views: 704
Posted By serialk11r
I thought sodium ion, lithium titanate, NiMH, and...

I thought sodium ion, lithium titanate, NiMH, and lead-acid are the only ones that can be charged below freezing, but this Winston does advertise -45C charging...

For a Prius battery I think you...
Forum: EcoModding Central 06-18-2023, 12:05 AM
Replies: 30
Views: 1,629
Posted By serialk11r
AFAIK the cost of cycling the battery is a lot...

AFAIK the cost of cycling the battery is a lot higher than the cost of running the alternator, so that panel better be supplying the full electrical needs of the car, which is a tall order.
Forum: EcoModding Central 05-01-2023, 01:36 PM
Replies: 153
Views: 5,637
Posted By serialk11r
I expect in maybe 10 years all the batteries...

I expect in maybe 10 years all the batteries produced for EVs will be like LTOs where the cycle life is effectively forever (>10k cycles), problem solved.
Forum: EcoModding Central 10-26-2022, 03:05 PM
Replies: 19
Views: 1,258
Posted By serialk11r
1.2gph sounds extremely wrong, that's far higher...

1.2gph sounds extremely wrong, that's far higher than my V8 Vantage's cold idle.
Forum: Hypermiling / EcoDriver's Ed 10-12-2022, 07:48 PM
Replies: 38
Views: 7,933
Posted By serialk11r
I don't think additives affect mpg, they are very...

I don't think additives affect mpg, they are very miniscule in concentration. I don't think the difference can come from ethanol either, because E10 is capped at 10%. However a lot of lighter...
Forum: General Efficiency Discussion 10-04-2022, 05:29 PM
Replies: 58
Views: 15,747
Posted By serialk11r
AFAIK barium sulfate is the best white pigment...

AFAIK barium sulfate is the best white pigment for "cooling", but it's harder to get. Really though I think you just need a white vinyl wrap if you don't already have a white car. The clear coat is...
Forum: EcoModding Central 09-15-2022, 06:48 AM
Replies: 22
Views: 1,928
Posted By serialk11r
Hmmm...there definitely is a speed below which...

Hmmm...there definitely is a speed below which you could accumulate some bearing wear every time the throttle is tapped to raise the engine speed. I doubt it's above 500rpm though, because engines...
Forum: EcoModding Central 09-11-2022, 02:52 PM
Replies: 6
Views: 683
Posted By serialk11r
The issue with PM generators (especially in...

The issue with PM generators (especially in gasoline engines) is that the amount of power available increases with rpm, but vehicles need the same amount of electrical power at idle. As the vehicle...
Forum: EcoModding Central 09-11-2022, 05:44 AM
Replies: 6
Views: 683
Posted By serialk11r
It's impractical to swap in a high quality...

It's impractical to swap in a high quality permanent magnet electric motor in as an alternator.

The auto alternator design is sort of reasonable for the application. Denso square windings have...
Forum: Aerodynamics 08-30-2022, 05:42 AM
Replies: 12
Views: 1,159
Posted By serialk11r
The roof fins caught my attention. I wonder what...

The roof fins caught my attention. I wonder what they do. The standard 911 body should have fully attached airflow and minimal trailing vortices over the rear.
Forum: Fossil Fuel Free 08-30-2022, 04:10 AM
Replies: 281
Views: 26,553
Posted By serialk11r
It could be a lot more than "3/4". I tried to...

It could be a lot more than "3/4". I tried to find prices for the actual shingles and couldn't. If it's 3/4 of the fully installed price in California where labor is crazy, that might not be as...
Forum: EcoModding Central 08-27-2022, 02:10 PM
Replies: 21
Views: 2,091
Posted By serialk11r
Nikasil is just nickel plating so silicon carbide...

Nikasil is just nickel plating so silicon carbide can be embedded in the cylinder liner for wear resistance. Plating is easier to apply than depositing iron spray or casting in silicon carbide matrix...
Forum: EcoModding Central 08-25-2022, 02:26 AM
Replies: 16
Views: 1,491
Posted By serialk11r
Aside from faster cat light off and smaller...

Aside from faster cat light off and smaller packaging, an integrated cooled exhaust manifold is a lot lighter than the usual steel manifold. E.g. 4 cylinder headers might be around 15lbs while the...
Forum: EcoModding Central 08-24-2022, 05:50 AM
Replies: 22
Views: 1,509
Posted By serialk11r
Hub motors run at very low speed. Alternators run...

Hub motors run at very low speed. Alternators run at 17000rpm. Huge difference.

Just look at the numbers for permanent magnet motor losses. It's not that bad, and you won't be spending a lot of...
Forum: EcoModding Central 08-24-2022, 05:25 AM
Replies: 22
Views: 1,509
Posted By serialk11r
Controllers are cheap....

Controllers are cheap. https://kellycontroller.com/controllers/brushless/

You want a small amount of net regen, so the pedal needs to be pressed a good amount before electric assist kicks in and...
Forum: EcoModding Central 08-17-2022, 12:25 AM
Replies: 11
Views: 1,030
Posted By serialk11r
I like having low voltage cutoff feature because...

I like having low voltage cutoff feature because I've damaged batteries by leaving the car sitting too long before. I went for "200A" on my LTO battery which cost 100 dollars for the BMS since it has...
Forum: EcoModding Central 08-15-2022, 05:09 AM
Replies: 11
Views: 1,030
Posted By serialk11r
Got it on Aliexpress. Paid 350 for 40Ah and a...

Got it on Aliexpress. Paid 350 for 40Ah and a 200A rated BMS.
Forum: EcoModding Central 08-15-2022, 03:59 AM
Replies: 11
Views: 1,030
Posted By serialk11r
If you search you'll find a lot of posts. ...

If you search you'll find a lot of posts.

Antigravity marks things up about 2.5x in exchange for good customer support. High current BMS with bluetooth costs about 100 bucks and the cells cost on...
Forum: EcoModding Central 08-14-2022, 04:39 AM
Replies: 33
Views: 3,224
Posted By serialk11r
Well, this sucks. I had some light ceramic film...

Well, this sucks. I had some light ceramic film applied to the windshield, and now I don't think I can see well enough at night anymore. I put the halogens back on and noticed I could see a bit...
Forum: EcoModding Central 08-12-2022, 03:21 AM
Replies: 33
Views: 3,224
Posted By serialk11r
Got the LEDs in the mail today and did some...

Got the LEDs in the mail today and did some testing. The beam pattern is pretty tight, it's still a little bit less focused than the halogen but it's very close, unlike some of the bulbs that aren't...
Forum: General Efficiency Discussion 08-11-2022, 04:03 PM
Replies: 21
Views: 2,575
Posted By serialk11r
I think that's gotta be transferring power...

I think that's gotta be transferring power through a set of gears vs. direct drive with no gears. There's no way e.g. 0.8 and 1 have a 2% difference in efficiency.
Forum: General Efficiency Discussion 08-10-2022, 01:35 PM
Replies: 21
Views: 2,575
Posted By serialk11r
I think 1:1 is more efficient for any fixed gear...

I think 1:1 is more efficient for any fixed gear strength as equal diameter gears have less sliding friction at the teeth for any given pitch. If the ratio is not 1, the smaller gear has to have a...
Forum: EcoModding Central 08-02-2022, 04:57 PM
Replies: 14
Views: 1,494
Posted By serialk11r
On an 03 Element with lead acid battery, what...

On an 03 Element with lead acid battery, what others said.

I just put a small solar panel on my new CR-V to keep it topped off because I noticed the start-stop doesn't work if the battery isn't at...
Forum: EcoModding Central 07-28-2022, 08:35 PM
Replies: 33
Views: 3,224
Posted By serialk11r
Yea I have experience with this. The ones that...

Yea I have experience with this. The ones that work well are the ones that have one thin strip of diodes in a straight line so the beam pattern is almost as focused as a halogen bulb filament. If the...
Forum: EcoModding Central 07-18-2022, 08:08 PM
Replies: 104
Views: 34,897
Posted By serialk11r
Maybe try a few of these in parallel + battery to...

Maybe try a few of these in parallel + battery to get the heater going?
https://www.aliexpress.com/item/3256802444317854.html

I still think these days it's better to just cough up money for...
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