Prop suggestion

[eagle927]

Got a Roadrunner 21 and needing to know what size prop to use and pipe length? thanks

 

[Chris Wood]

well alot depends on the motor.. what motor are you using.. what pipe are you using and is the motor stock. also nitro percentage.

but without all that info i would say a h-7 or a 1450 or a h-5 or h-6

if it is a ops 3280 start at 8 1/4 and go in from there.. if it is the new cooper s-pipe start at 8 and go from there.

chris

 

[eagle927]

thanks Chris Motor is going to be NovaRossi 21 not stock and 3280 pipe.

 

[brett english]

thanks Chris Motor is going to be NovaRossi 21 not stock and 3280 pipe.

i have the same boat with the novarossi 21...im running a oct 1445 done by andy brown with 3.8 cup..very fast boat!

im using an erwin pipe

 

[Joe Warren]

thanks Chris Motor is going to be NovaRossi 21 not stock and 3280 pipe.

Center of plug to the band on the pipe (3280 excellent choice)) should be 3 1/2 length. measuring alone side of the engine. 1450 cupped untill desired speed.

 

[eagle927]

Well will not be using the 3280 pipe lost it in the lake yesterday I now have a carbon fiber pipe on it now.