For the very few of you with a DIY EV conversion, allow me to describe the virtues of a functional tachometer.
It's amazing. I cannot believe I didn't do this before. It makes driving 100% more enjoyable. Downshifting without a clutch is slicker than goose $*&# because you precisely know your "blip RPM". Try blipping the throttle on a motor that you cannot hear. That was me before.
I now have figured out my power curve and shift points. I used to guess before. Now I do not have to. Peak power is at 3400 RPM. I can tell because of the sudden slight lurch of power and drop in battery voltage when the Alltrax reaches peak output voltage and goes into bypass (which is another reason I love the Alltrax, because it has a bypass making it nearly 100% efficient at peak output). It is pretty much out of steam by 4000 RPM. I can now shift by RPM and not vehicle speed.
As you can tell, the Electric Booger is running better than ever and I am very happy with it. Thanks again to MetroMPG for giving me this series wound motor. Well, "giving" is a strong word because the deal was that I now owe him a case of home made beer. So in my garage is 6 gallons of a very dark, highly hopped ale.
Here is my helper helping me mash the grain, making delicious, sweet, fermentable wort:
