[jhautz]

You should check out Brian G's top speed calulator and motor esitmator. Plug in the specifics of your setup (ie. Cell Count, Tire Size, Gearing, etc...) and it will tell you what to expect for top end. The motor estimator will help you select a motor that will eget you to the speed range you are looking for. Cool liitle tool. Check it out.
http://scriptasylum.com/rc_speed/index.html


Generally I agree with whats already been said. Top end on a 9xl with 14 cells will be a little low compared to a 3.3 nitro, but you will accelerate faster. Going with a higher KV motor or more cells will fix that though. The 9XL on 14 cells will be a nice long running setup that should stay nice and cool, but you are giving up some top end to get that.


I run my e-maxx with a 9xl on 66/24 gearing and standard size tires (5.7") and 5s Lipo(18.5v) and get fantastic results that would easily spank those nitros. It has about the same top end, but gets there much faster. The motor and everything stays cool, but I do sugest getting a heat sink for the Quark so it stays cool for you. Thats the one weakness of that esc. As has already been said, if you plan to stay with the 9xl look into going to 16 cells.