HELP What helix for Polaris 726

[73tmeyer]

Ok so i am running a polaris 726 mod motor based off the 600 used in the pro-x racers. i have the team TSS-04 but the helix is out of a 440 is is a 70-44-46/66-44-46 will one of these work or should i buy a different helix and if so what one? it also has the black/gray spring thanks

also any clue to what primary spring i should run? thanks

 

[prox660]

Try the 66degree helix with a 160/260 spring, and 60g/150-300 or 62g/165-300...should be close