Quote:
Originally Posted by diesel_john
spring loaded flapper
Oh, you mean like this one on my F250.  |
Exactly, but with a one inch or so hole in it and a spring tuned to let the flapper gradually open from 3000 or so rpm.
My bet with this thing is to affect the flow during valve overlap. If there is more restriction in the exhaust, hopefully more of the gasses with stay in the chamber.