Karma Weight loss - Fisker Buzz Forums
Fisker Buzz Forums

User Tag List

Reply
 
LinkBack Thread Tools
Old 11-10-2014, 03:58 PM   #1 (permalink)
Member
 
Join Date: Apr 2013
Posts: 80
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Default Karma Weight loss

Reading a recent article about the Chevy Volt which has now lost close to 160lbs, and my experienve with another car forum where we had a sticky where members who lightened their cars kept a record (titanium lug nuts = 1.5lbs saved or changed your wheels over stock )

What can be done to help the fisker lose weight? (Besides the drivers) it always seemed to me the brakes and rotors are way tooo beefy (especially given regenerative breaking) but what do I know. (But would love to lower unsprung weight)
asulil is offline   Reply With Quote
Old 11-10-2014, 07:14 PM   #2 (permalink)
Senior Member
 
Join Date: Mar 2012
Location: South Florida
Posts: 3,055
Mentioned: 149 Post(s)
Tagged: 3 Thread(s)
Quoted: 505 Post(s)
Default

Fisker was working on this before they closed. From removing heat shields that are overkill and redesign wheel rim . When i went out to Fisker they had new rims that probably weighted half as much as the present ones.
Harleyguy is offline   Reply With Quote
Old 11-11-2014, 10:33 AM   #3 (permalink)
Super Moderator
 
Fabulist's Avatar
 
Join Date: Apr 2011
Location: San Francisco, CA
Posts: 4,659
Mentioned: 44 Post(s)
Tagged: 1 Thread(s)
Quoted: 402 Post(s)
Default

Quote:
Originally Posted by Harleyguy View Post
Fisker was working on this before they closed. From removing heat shields that are overkill and redesign wheel rim . When i went out to Fisker they had new rims that probably weighted half as much as the present ones.
There are probably other opportunities as well, for example removing the solar panel and glass and putting in a composite or CF roof should save a few kilos.
__________________
-- Fab.

Original owner of 2012 Eco Sport Black (Eclipse) with Monsoon Tritone Interior. VIN: -0641
Fabulist is offline   Reply With Quote
 
Old 11-11-2014, 03:51 PM   #4 (permalink)
Senior Member
 
non sequitur's Avatar
 
Join Date: Sep 2012
Location: Northern Miami, FL
Posts: 530
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 122 Post(s)
Garage
Default

I was hoping that with ownership of A123 under the Wx umbrella, they would be working to develop longer-range, yet lighter, battery systems. It's the battery weight above all else that makes this a 6000LB beast, so that's where the best opportunity for weight-loss lies.
non sequitur is offline   Reply With Quote
Old 11-11-2014, 05:19 PM   #5 (permalink)
Member
 
Join Date: Apr 2013
Posts: 80
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Default

I have read the battery only weighs about 600lbs ( that's only about 11%) - I bet the rotors each weigh 30lbs)
asulil is offline   Reply With Quote
Old 11-11-2014, 07:00 PM   #6 (permalink)
Early Adopter
 
Nin ja's Avatar
 
Join Date: Jan 2012
Location: Virginia
Posts: 1,245
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 217 Post(s)
Garage
Default

Updating the electric motors , Generator and ICE with light material could lighten up the load, no?
__________________
Karma Ecosport eclipse / dune
Nin ja is offline   Reply With Quote
Old 11-11-2014, 07:39 PM   #7 (permalink)
Deep Ocean in ATL
 
Join Date: Dec 2013
Location: Atlanta
Posts: 436
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Default

My tire dealer commented that the stock wheels were some of the heaviest rims he had ever lifted. Made me feel better since I struggled getting them back on the lugs when rotating the tires (convenience).

The question I have is: Let's say I went to after market rims 50% lighter. Does that translate "significantly" to range?

Anyone have experience in doing so? I like the stock rims look, and don't want to spend $2K for naught.
AlJOHN is offline   Reply With Quote
Old 11-12-2014, 01:32 AM   #8 (permalink)
Member
 
Join Date: Apr 2013
Posts: 80
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Default

Quote:
Originally Posted by AlJOHN View Post
My tire dealer commented that the stock wheels were some of the heaviest rims he had ever lifted. Made me feel better since I struggled getting them back on the lugs when rotating the tires (convenience).

The question I have is: Let's say I went to after market rims 50% lighter. Does that translate "significantly" to range?

Anyone have experience in doing so? I like the stock rims look, and don't want to spend $2K for naught.
Unsprung mass (wheels, brakes, - anything not supported by the suspension) I have heard that losing 1lb is equal to 2lbs of static weight. I think losing weight gets better acceleration and better range.
asulil is offline   Reply With Quote
Old 11-12-2014, 05:39 PM   #9 (permalink)
Deep Ocean in ATL
 
Join Date: Dec 2013
Location: Atlanta
Posts: 436
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 111 Post(s)
Default

Thanks asulil. I understand the concepts of lessening unsprung weight and its affect on a number of things. I guess there is no specific data on reducing the weight of the Fisker rims by % and the true resulting benefit.

Maybe a little hard to measure definitively without the use of a dyno-meter.
AlJOHN is offline   Reply With Quote
Old 11-14-2014, 10:59 AM   #10 (permalink)
Member
 
Join Date: Oct 2013
Posts: 45
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Default

Lighter rims - absolutely no doubt.
Landodder is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
loss of power? Landodder Fisker Karma 25 11-16-2014 10:51 AM
Reduced Performance message/loss of power PKB Houston Introductions 12 09-15-2014 04:26 PM
Karma a "loss leader" at $96K SoCalGuy Fisker Karma 2 08-30-2012 03:26 PM
Weight audit SoCalGuy Fisker Karma 3 01-10-2012 02:09 PM
A123 Systems 2Q Loss brian Fisker Karma 0 08-04-2011 08:47 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -4. The time now is 09:53 PM.



Powered by vBulletin® Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0 PL2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.