RE: RCGF 40cc twin - air intake
Velocity stacks work,not just for looks because they are functional,they stop the fuel from spitting out the carb intake end,my 40 twin is a 90 degree off the carb 12" back into the fuse witch the last 5" opens from 1 1/8" to 3" to form a ram effect and totally retune the carb.I have done with a 100cc first and it worked so well so i thought a 40 mite do as well and it did.this from drawing air from the inside,I have not tried this from the outside airflow but stacks do help.SGT for your info YES stacks do work.