My project is getting closer and I've driven it around the block a few times but it's much too slow.
The car is a GT40 kit car built on a VW. It has 120 volts of 10 12volt used sealed lead acid batteries that used to be in a Ford think. Pack voltage checks out and my state of charge registers full power. The pack is seperated into 4 batteries in front, 2 behind the seats, and another pack of 4 in buried in the rear deck, all connected by 2/0 cable.
I have a Kelly KDH12400 (120v 400a) controller and a D&D ES-15A-6 motor coupled directly to the transaxle - no clutch. Shifting is no problem, but I just can't get up to to speed. At full throttle, the voltage from the controller won't go over 100 volts and the current ranges from 0-300 depending on the grade. The pack appears to drain slowly, but one or two will drain much faster and I have to charge them individually to keep the pack full.
I'm not looking to dust any Ferrari's, but I'd like to get up to freeway speed in less than 15 seconds while maintaining an average range of 40 miles per charge.
I'm already way over budget, but I need to fix the speed problem or the project is a failure. I'd rather not replace everything and if I can nail the problem down to batteries, controller, or motor then I can salvage my dream and my sanity.
I've gone over a few of the help pages on this site regarding motors, controllers, and batteries, and I'm thinking I should switch to LiFe batteries (I can fit a pack of 100ah thundersky's without modifying all of my racks) and/or consider going with a AC50 motor/controller setup, but that really means starting all over, which I would like to avoid if possible.
I'm a builder, not an engineer, so if you can keep it in layman's terms, then I'll have a much better chance of grasping what you're trying to tell me and put it into action.
Any ideas or suggestions on how I should proceed?
The car is a GT40 kit car built on a VW. It has 120 volts of 10 12volt used sealed lead acid batteries that used to be in a Ford think. Pack voltage checks out and my state of charge registers full power. The pack is seperated into 4 batteries in front, 2 behind the seats, and another pack of 4 in buried in the rear deck, all connected by 2/0 cable.
I have a Kelly KDH12400 (120v 400a) controller and a D&D ES-15A-6 motor coupled directly to the transaxle - no clutch. Shifting is no problem, but I just can't get up to to speed. At full throttle, the voltage from the controller won't go over 100 volts and the current ranges from 0-300 depending on the grade. The pack appears to drain slowly, but one or two will drain much faster and I have to charge them individually to keep the pack full.
I'm not looking to dust any Ferrari's, but I'd like to get up to freeway speed in less than 15 seconds while maintaining an average range of 40 miles per charge.
I'm already way over budget, but I need to fix the speed problem or the project is a failure. I'd rather not replace everything and if I can nail the problem down to batteries, controller, or motor then I can salvage my dream and my sanity.
I've gone over a few of the help pages on this site regarding motors, controllers, and batteries, and I'm thinking I should switch to LiFe batteries (I can fit a pack of 100ah thundersky's without modifying all of my racks) and/or consider going with a AC50 motor/controller setup, but that really means starting all over, which I would like to avoid if possible.
I'm a builder, not an engineer, so if you can keep it in layman's terms, then I'll have a much better chance of grasping what you're trying to tell me and put it into action.
Any ideas or suggestions on how I should proceed?
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