OLD_SLOW and in the WAY

the units i tested have a 355ml volume ( as reference it the same volume as a 12oz pop can) with a 3/8" diameter intake horn by 1" long, the horn can be anywhere on the resonator. basically it uses the spitback to help charge the resonator box and the inertia of the incoming air through the smaller opening overcomes the spitback which supercharges the next intake cycle. the engine comes on like a nitrous shot. the shape of the resonator isnt critical as long as you have 1" between the carb opening and the resonator wall, you will have to have the intake runner lenght set at 3 13/16" from piston face to carb opening. the resonator will give you some insurance in a dunking by keeping from gettin hydro'd.
nevermind the aluminum chips it was in the construction stage



here are the only pice i have left of the "ratflask" hemmholz resonator.
the container was made by rubbermaid and had a very tight seal with the lid.





this is the velocity stack used inside the flask




inlet horn and grommet




interior of flask




profile of intake stack, the 5 to 8% refernces the gain over a straight carb opening








i am no longer in the biz so youz guyz are on your own if you want one

dc2 man

thanks for sharing that.

mmm intresting...i would like to learn more about this.
from looking at pics i still cant understand where it goes how it works?

could you explain please where it is mounted?
thanks
dc2