Motor KV=Turn

Castle Creations CM36 brushless / brushed equivalent:
S7700 (7,700kV) = 6-turn
S6900 (6,900kV) = 8-turn
S5700 (5,700kV) = 10-turn
S4600 (4,600kV) = 16-turn

LRP Vector brushless / brushed equivalent:
X-11 3.0 (11,400kV) = 3-turn
X-11 3.5 (9,800kV) = 3-turn
X-11 4.0 (8,600kV) = 4-turn
X-11 4.5 (7,800kV) = 5-turn
X-11 5.5 (8,100kV) = 7-turn
X-11 6.5 (6,900kV) = 9-turn
X-11 7.5 (5,900kV) = 11-turn
X-11 13.5 (3,350kV) = stock 27-turn

Novak SS/EX/Velociti brushless / brushed equivalent:
3.5R (10,500kV) = 3-turn
4.5R (9,000kV) = 5-turn
5.5R (7,400kV) = 7-turn
6.5R (6,400kV) = 9-turn
7.5R (5,800kV) = 11-turn
8.5 / SS5800 (5,000kV) = 13-turn
10.5 / SS4300 (4,200kV) = 19-turn
13.5 (3,300kV) = stock 27-turn

Reedy Neo-One brushless / brushed equivalent: 
4-Star (7,400kV) = 7-turn
3-Star (6,400kV) = 9-turn
2-Star (5,800kV) = 11-turn
1-Star (5,000kV) = 13-turn

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per Adam (THANKS!!!)

SPEED PASSION;
Turn - KV
2.5 - 12,100
3.5 - 8200
4.0 - 7600
4.5 - 7200
5.5 - 6200
6.5 - 5100
7.5 - 4500
8.5 - 4000
9.5 - 3400
10.5 - 3200
11.5 - 3000
13.5 - 2800
17.5 - 2600
21.5 - 2000

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Traxxas VELINEON 3500 KV = 10-Turn

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Feigao 540 XL 2383 kv = 7 turn