I'd like to share some information I've gathered regarding the use of cheap Chinese filters.
First, notice that in the k&n filters, if you look inside through the boot, the wall of the boot is flat all the way back. This is significant. On the cheap filters, there is a "lip" holding the boot on.
This lip interferes with the orifices at the mouth of the carburetors, causing many potential problems. I plan on documenting (with pictures) the interference I'm talking about.
Same boot with cutouts to show difference
Cv carbs need vacuum to function properly. The goal for these carburetors is to free up as much restriction through the intake as possible without freeing up too much
. This is a controversial theory and I'm sure has been discussed in great length, so I'll leave that to those more intelligent than I.
I didn't make a good user name and I can't change it, so please call me Nate.