I have been wondering about this for a while and figured tonight would be as good a time as any to do a little test. I have a couple Lipo batteries that probably won't be used for a month or two, so I just charged them and now ran them down to about 3.75v per cell for "storage". Well, as I was doing this I though why not compare the perforance of different "C" rated packs and see how much of a difference it actually makes. The vehicle I was running for this test was my Losi 8ight-T 2.0 that has a Mamba Monster ESC and a Nue 1518 1800kv motor. I have it geared at 17/50 which I figured was good for about 50MPH or so (I have this set up to run cooler and more conservative than my 8ight buggy which is gear for top speed runs at 26/43 LOL!). The first set of batteries I tested was a dual 3s lipo setup. The batteries are Turnigy 3s 5000mah 20C constant/30C burst run in series for 6s. These pack are almost new with only about 4-5 runs on them. I have a Garmin Forerunner GPS that I use for speed runs so I used it to test my top speed with each setup. The Turnigy batts gave me a top speed of 52.2 MPH which calculates to 35,5xx RPM. The next battery setup I ran was a SkyLipo 6s 5000mah 40C constant/ 80C burst. This setup gave me a top speed of 54.3 MPH and 37,0xx RPM. Both battery setups where barely warm to the touch after about 8-10 minutes of runtime the wires on the 20C batts were a little warmer than the wires on the 40C batts. But there was barely a significant difference. I also was checking the voltage every minute or two since I was wanting to get to a specific voltage of 3.75v per cell for storage. I didn't start doing speed runs untill the batts were just under 3.9v/ cell. I did make sure the voltage was the same with both battery setups when doing the runs so everything could remain consistant. I did do one run with the SkyLipo when it was at full charge and it hit 56.7MPH but that really is irrelevant to this test.

I like information so that is all this test provides. I really don't care about top end speed with this truggy but I like to know what it is capable of and how much of a diffrence little changes make. You are free for form your own opinions about how your truck should be setup, but higher "C" rated batteries are more expensive so knowing how much of a performance gain you will see for the money you either spend or save can be nice to know. I will add that with both battery setups the truggy would do backflips at over 10MPH without any trouble no matter which setup was used! I was sligthly conserned that the 20C batts wouldn't provide enough juice to power this sytem but apparently they are more than capable.