Hello Steve, Find out where the sweet spot of the motor is which is the maximum torque at a certain rpm. At this rpm, then you up shift one gear and repeat this shift pattern. you will have to manual shift the transmission to do this. Many of these large vehicles have a selection lever that can either select manual or automatic.
It is ideal to have the torque converter full lock up at the sweet spot rpm. In these larger vehicles, the full lock up is lower than a standard vehicle. I can hold the same motor ampere at this sweet spot rpm in any gear. I have increase my range by about 25 percent by using a torque converter that full lockups at the sweet spot rpm. My full lock up with this type of large vehicle torque converter is 1700 rpm and the starting lock up is 300 rpm. At the starting lock up the torque converter adds about 1.8:1 ratio. Roland ----- Original Message ----- From: Steve Clunn<mailto:[email protected]> To: [email protected]<mailto:[email protected]> Sent: Friday, February 14, 2014 8:33 AM Subject: Re: [EVDL] 18 Wheeler We went to a gravel yard that is about 5 miles away and picked up a load of gravel. The truck and trailer together with the empty trailer weighs 34,860 lbs. The weight of the load by its self is 47,920 lbs gross weight 82,7800 lbs. On the way back with the load of gravel that weighs more than the truck the proformance was about the same . With 2 amp on the field the motor will top out at about 400 amp . With the field at full power the motor's RPM is so low that the autamatic tranny won't shift and max amps are about 150amp. Right now Scott ( my customer) is using 200 ah Real Force (96 cells) and the plan is for 4 sets of them giving 800 ah . The 10 miles trip used 96 ah or 30kwh. I was expecting better proformance than this as the 10kwh = one gallon rule with the truck getting 7 mpg , it should get about 20 miles on 10 kwh. The autamatic tranny makes lots of noise and vibration so this may be where the loss is . Another factor might but that the desial engine set up in these trucks is more efficient than car gas engines. Scott is very happy , with the set up and that's what counts . Video: http://www.greenshedconversions.com/Pages/seminar.aspx<http://www.greenshedconversions.com/Pages/seminar.aspx> -- Steve Clunn Merging the best of the past with the best of the future. www.Greenshedconversions.com<http://www.greenshedconversions.com/> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140214/eefa2298/attachment.htm<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140214/eefa2298/attachment.htm>> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA>) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140214/6e439e55/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
