I'd like to add my experiences with the 1406-7700 motor in my 1/10 funny car over the last few weeks.
The first attempt to run this motor was at Autorama 2010 at George R. Brown Convention Center at a RC drag racing exhibition race November 25 - 28, 2010. That didn't go over too well in that the track was way too sticky for any fast numbers. I noticed that this motor has a lot more torque than I anticipated, which meant I had to use wide tires as well as more torque control than I wanted to. The stickyness of the track meant that with the lower available torque start off was sluggish, but the top end was good. The best I could manage was a 1.7s ET.
At this point I decided that further testing at this location was futile and should be continued at the next race in San Antonio, which would be the final race of the 2010 Texas Twister Race Series, held last Saturday (12/11/10). So the car was set up like it was at Autorama: MMM ESC, TP 4200 3S Lipo, weight at 49oz, 4.30:1 gearing, 2.8" tires. This was good for 1.563s @ 84.1mph in the 2nd round of qualifying, and got me the TQ.
It got cold quick after that and ET's didn't go down any further due to low lipo performance in the cold. However, I went on to win the class with 1.6s ET runs in the next few rounds into the finals, where I ran a 1.7s (it got colder still!).
So, here are my thoughts about this motor. Toque monster!!! With the lipo discharge levels that we run, this motor creates gobs and gobs of tire shredding torque with extreme ease. I have to get more familiar with the Torque Limit settings a little more in order to really unleash some fast ET's. One thing that I really like about the motor was how smooth it was when everything was dialed in. That 1.563s pass was so smooth all the way down the track. Now the trick is to keep that smoothness going into faster ET's, which should be no problem as I run it more and more and get a feel for its power characteristics. My attempts will continue next season as we have already closed out 2010 and will post updates as they come.
My thanks and deep gratitude go to Patrick and the awesome folks at Castle for getting me this jewel of a motor to race with.