Thats a good question. I'd probably say the smaller 1512 would be the better choice for run times, though performance would depend on the vehicle; anything that could be moved well by the smaller motor wouldnt really need a bigger motor (over kill?).
I know that it is overkill, but, from a performance ( mostly curious about run time )point of view I was wondering if anyone had compared two similar setups and tried anything like this.
Depends on how you have it geared and how you drive. If the two systems are geared the same the slower motor will give you longer runtimes if you spend most of your time at top speed. If you are constantly accelerating the 1515 may be able to pull more amperage (accelerate harder) and your runtime could be lower.
Geared for the same speed I would say the 1515 will have less runtime, as you will probably be pulling the trigger enough to use the extra power.
---JRH---
Last edited by johnrobholmes; 05.18.2008 at 05:57 PM.