Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 10-07-2010, 03:34 AM   #21 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
Very important to have the brushes advanced AGAINST the desired direction of rotation. I did a few videos on the subject. Here's the first one:

__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 10-10-2010, 05:44 PM   #22 (permalink)
Master EcoModder
 
Join Date: Sep 2010
Location: Saskatoon, canada
Posts: 1,431

ChargE (not yet running) - '92 Mazda MX6 LX
90 day: 33.89 mpg (US)

Ford Prefect - '18 Ford F150 XLT XTR
Thanks: 727
Thanked 526 Times in 421 Posts
How to estimate amp-hours from a couple of short tests?

Quote:
Originally Posted by LouMan View Post
my thoughts exactly boydfoose,

I was wondering how you calculate the amphours on a battery if it dosn't tell all the data?
...
how do you calc the ones that says the amp hours but dont say what the draw is?
I'm interested if there are 'rules of thumb' for estimating amp-hours on used or new batteries, or perhaps a test you can run at a couple of discharge rates to estimate usable amp-hours - there seem to be so many variables in manufacturing (or in how they were used by the previous owner) that affect what current you'll get, and for how long ...

Even when the amp-hours are listed on the side of the battery, that's now what you get out of them. In my example I have a couple of (very used) 100 amp-hour 12V cells that will give me about 15 amp-hours at a 30 minute rate, 30 amps for 30 minutes. You can't do that sort of test in a store or at an auction before buying them. Is there a short test you can do to get a reasonable estimate?

thingstodo
  Reply With Quote
Old 10-12-2010, 03:32 AM   #23 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
Sadly the 20 hour rate or c/20 means very little in an ev. Expect to get a maximum of 50% of c/20 due to peukert effect. This is why forklift batteries are rated at c/5.
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 10-12-2010, 02:00 PM   #24 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
Your too big concerns there are driveshaft clearance between motor frame and motor to frame rail clearance on the far side of the engine bay. Are you keeping the clutch?
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 10-18-2010, 04:00 PM   #25 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
i mailed the lugs on saturday. sadly the contactor contacts were too badly worn to be of any use. sorry
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 10-25-2010, 05:28 AM   #26 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
To find the center of blind holes try this: Get a big sheet of gasket paper from an auto supply store. Big enough to span the bellhousing. Now you want a scrap bolt slightly bigger than and of the holes and dirty , oily hands (seriously). Pick one hole and punch through the gasket paper and pin it. Then with your oily hands press down on the paper over the hole positions. The dirt and oil will help locate the holes. Then take a small hammer and the over size bolt and tap around the impressions until the little disc of paper over the hole pops out. Pin each new hole with a bolt and continue. You now have a paper template of the bellhousing. Some engines have a metal gasket behind the flywheel end which saves a lot of work.

I'd caution the use of a lovejoy coupler. It caused me no end of grief. The biggest problem being its tendency to slide apart. Does your gearbox input shaft have one or two bearings? A flexi coupler is a good idea if its a two bearing (most fwd cars are) but something like a tyre coupler where the two ends bolt through the donut would be better.

I had that problem with the clutch. Could only buy a kit for crazy money. So i started calling around independent garages and got 2 discs with perfect centers but ruined linings for free.
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 10-25-2010, 10:13 AM   #27 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,822

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,365
Thanked 1,107 Times in 726 Posts
I also had trouble with the lovejoys coming apart until I (this is going to sound really really crappy... But it worked) wrapped the lovejoys in electrical tape. Not around the circular way, but so that it sandwiched them together. Then I coated the electrical tape in a thin "carmelization" of gorilla glue. It didn't take much to hold them together.
__________________
kits and boards
  Reply With Quote
Old 10-25-2010, 06:07 PM   #28 (permalink)
PaulH
 
MPaulHolmes's Avatar
 
Join Date: Feb 2008
Location: Maricopa, AZ (sort of. Actually outside of town)
Posts: 3,822

Michael's Electric Beetle - '71 Volkswagen Superbeetle 500000
Thanks: 1,365
Thanked 1,107 Times in 726 Posts
Let me know how the Climax shaft collar works for you. Um, I'm not going to make any comments on the name of the company, or the part or anything. I'm just going to say that I hope it works well for you.
__________________
kits and boards
  Reply With Quote
Old 10-26-2010, 03:28 AM   #29 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
We call em a HRC coupler over here. Bit less risque
__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Old 10-26-2010, 03:09 PM   #30 (permalink)
Master EcoModder
 
jackbauer's Avatar
 
Join Date: Sep 2009
Location: Ireland
Posts: 734
Thanks: 26
Thanked 296 Times in 168 Posts
No probs. Sorry it couldn't be more.

__________________
Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
www.evbmw.com
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric car conversion: Project ForkenSwift MetroMPG Fossil Fuel Free 1041 07-28-2014 10:19 AM
Electric Fan Conversion (Ford Ranger) allc0re EcoModding Central 13 05-01-2014 11:07 AM
AC Dodge Neon Electric Conversion Videos bennelson Fossil Fuel Free 57 10-25-2011 12:25 AM
100 mile range Ranger EV? Frank Lee Fossil Fuel Free 10 08-05-2010 01:09 PM
94 ford aspire project bottonavy EcoModding Central 12 10-09-2008 05:44 PM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com