Not to sure about a buggy, and it would depend on what diff ratio, but i'm gonna take a shot here and say maybe a 14 or 16? Search the threads and look for truggy's / buggy's and see what they say? That would be my best guess. What pitch are you runnin for your spur? Many things matter when selecting the proper gearing...

16 cell's for a 7xl is to hot. You are better off with a 9xl.

I run 16 cells with a 10xl. with truggy, look in the thread for truggy for gearing.

ok, how about going in the middle with the motor with a 8xl on 16 cells. why is the 7xl to hot for 16 cells? :032:

Cause the motor will rev very high. You should keep it in the 35.000 range, this to keep from going to extreme small pinion's to compensate for the high rpm. But it also causes the motor to work hard running allot of rpm, decreasing power and efficiency.

The motor has a rpm/ volt of 2332, multiply this by 19,2 volt's and you get 44774 rpm.

The 9xl has a rpm/ volt of 1853, multiply this by 19,2 volt's and you get 35577 rpm.

Sneecks exactly right. The 9XL will also run cooler and have just as much power with the appropriate gearing.

i plan on getting a wanderer

7xl has a kv of 2145, 41,184 rpm

8xl has a kv of 1875, 36,000 rpm

9xl has a kv of 1667, 32,006 rpm

i guess those are loaded kv ratings:032:

how would i gear the 9xl to get the same speed and acceleration as the 7xl? would it still beat the pants off a nitro? :005:

Of course....thats not hard to do.....Even the HV-Maxx can do that :005: Anywho, yes, those are loaded KV ratings and a 9XL would be the best choice. Gearing depends on the diffs, spur, ect. What ratio are the diffs? How big is the spur?

the spur is a plastic 51 tooth mod 1, stock ofna diffs 3.3:1 ratio:032: , panther komodo tires. what would be the runtime difference between the 7,8, and 9xl motors on 16 GP 3300's?

The 9XL would give you the longest runtime on 16 cells since it's the most mild of the motors you listed. It would still do very well with the appropriate gearing though! The actual runtime difference is hard to calculate, it depends primarily on gearing and how you drive.

another update, Finally found a body that actually fit right. It is a kyosho st-r body. Do you like it, is the first body I’ve done with an airbrush. More motor questions, would I get speed in the 40’s with a 9xl and 16 cells? It only weighs 6 pounds with 16 cells, no motor or speed control. Which motor, wanderer 9xl or feigao 540C 9xl? Still haven’t figured out the gearing, 15, 16 tooth pinion may be? On to the pics…

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I would certainly go for a Feigao C motor. A 9XL on 16 cells would be a good choice as well. I'm not possitive but a 15 or so sound be about right.

Fiegao C motor, 9xl would be good, 10xl on 16 would be better. Will run fast and cool. I think you did a great job on that body! Matches the truck well!

nice truck newuser! you'll get the speed in a 9 or 10xl for sure.

its my truggy not newuser's, say it with me now c-e-m-e-t-e-r-y... :005: lol

Why would the 10xl be better then the 9xl? Could mike get a feigao 540c 10xl? It is not listed in his store, I'm not ready to buy, but i just wanted to know. Could I get about the same speed as a 9xl on 16 cells with a 10xl on 18 cells? That is the maximum amount of cells i cound fit. Sorry for so many questions!! BRUSHLESS ROCKS!!!!!!:017:

Yep, that not mine! But NICE! Great job! Don't worry about the questions, if you don't ask you won't know. PM Mike and see what he can do for you, if he can get it, he will, or have a suggestion that will be comparable.

Ok I finally got my truggy running; it’s no longer a work in progress! The Quark 125, 9xl, and 16 GP 3300’s are great! This truck has soooooo much rip! I was expecting less, what a nice surprise!:027: The first 10 minutes of running on pavement got the temps up pretty good, 135-140F:013: on the esc, 151-159F:026: on the motor, and 100F:018: on the batteries. So I added heatsinks to the esc(used aluminum “L” channel like BrianG with heatsinks on the “L” channel) and a 12v fan to the motor. 7 minutes of hard running on grass produced temps of 110F on the esc 106F on the motor and 100F on the batteries. So far I am very very happy with it! On to the pics!....

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