did try the 8mm venturi today and retuned the engin.It did really help alot.

Did suddenly get the punch in the start that i need for the jumps.
Glad i bought two arrows.
And the novarossi BTT is now only a reserve.
If there wil be a new novarossi in my car later ,it is only becouse someone gave it away.
I did already since i started racing use 3 novarossi.They al lasted 8-10 gallons without changeing anything.

So if the arrow last more than 6 gallons it is good bargain..