On Thu, Nov 13, 2014 at 4:26 PM, Adam Chasen <[email protected]> wrote:
> Chris, > You are correct! I was able to confirm just by setting the PWM low enough > to see that the motor wouldn't continue to spin past a certain speed. > Looks like I am still running the 100% original Presolite 4001 MTA. I do > get it pretty hot on the highway though. What would the recommended max > temperature be? Occasionally it is painful to touch > . > You always want your motor spinning fast. That's where cooling is best and efficiency is high. Don't overspeed. I think the practical maximum on those motors is around 5500 - 6000 rpm without mods. One thing I never got around to trying had to do with air flow on my Leopard. It's a front-mid-engine placement (motor behind front wheels), with a pretty solid ceiling of batteries above it and sheet metal all around. It rides somewhat above the bottom edge of the bell housing, so it is essentially in a deep box that's open on the bottom. I could see how much of the air from the fan outlet could be circulated right back into the intake. Check the installation in your car to see if there's a similar situation. What I had planned was to add a shallow but wide scoop forward of the motor that would duct air directly to the inlet. The scoop would act like an air dam with respect to the air behind it (i.e. under the motor), creating a negative pressure and drawing the exhaust out. Basically changing from recirculation to flow-through. Take a look at your motor's surroundings with an eye toward what they do to the air flow. You may find a solution there. Chris -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141113/bbc3da5f/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)
