Fellow's that are running the Tower 40's I am courious about your set up, prop fuel plug mods, if any, and any other info that you can share..

  Thanks a lot...

you will  need to give your setup for answers, venturi  size   needle type, head motor stock modified butchered    etc

Randy

My setup for the Tower 40 is to B&B the motor. ( balance crank make sure all fits are in specs) Cut heat dam on head, fins, and install  either  a  .255  venturi with OS NVA, or  better, a  PA NVA with  .281 venturi,  1 or 2 head shims, NO change to the Excellent head plug in, fuel with 22 to 24% oil mostly ( 3/4) synthetic  oil.  Bolly  12 x 4 is best I have ever seen on this, or  use a  Power Point  11 x 4, Z  pro 11 x 4,  Cyclone  11 x 4.5  2 blade props, launch in mixture cackling 4-2 or just barley into a 2 stroke, engine will unload within 1 lap  and get a little  richer,  open free flowing  tube, or  tongue muffler .
some get  a 11 x 5  and run a 4/2,  DO NOT  use as 6 pitch prop with this setup, it will  run away , DO NOt use a very restrictive muffler, use whatever nitro you need for the  Weather/altitude/humidity

Randy