joosten, you have to remember; power is the product of rpm and torque. More rpm = more power, and more torque = more power. The L series motors get their power from high rpm's and the XL motors get their power from torque. Both L and XL motors can be geared to give the same speed - but the main advantages of XL motors is they run cooler and have the potential for higher cell counts.

You said yourself, the 8L in your TXT needs a fan to keep it cool. If you ran an 8XL, you could gear up to get the same speed and you won't need a fan to keep temps down.

Basically, unless weight is a big issue, XL motors are always the better choice over L motors.

The torque of the xl motors passes the 8L. My brother used to run the 8L. He like the xl motors much better. You can gear them for more speed have more torque with less heat. I had a 7xl geared 22 66 with 18 cells on it. The 8L didn't stand a chance. It could have used a fan on it. It was fast and powerful.

What kind of batteries are you guys running and what chargers are you using?

How does runtime compare between an L series and an XL series? I am running a 9L at 16/72 and have about a 20 minute run time for the first run of the day on my only set of 13 GP3300's, as well as good speed, but I haven't measured it yet. The motor does often get too hot to touch. Usually about 60 degrees Celcius, or about 140 degrees F. I would like at least the same speed that I have now, or about 40MPH and the same runtime. Which XL should I get and what gearing should I run with it? I may not get one due to being low on cash, but I can still plan:027:.
Also, how hot is too hot for a 9L motor? I really don't want to ruin it.

Thanx,
Brijar!!!

For batteries i run gp 3300 gp 3700 and ib 3800. I have from 6 cell packs to a 13 cell packs. 140 f is not bad on temp. It is warm but not to bad. Keep it as far under 180 as possible.