photo IMG_2230.jpg  We've been selling the Brackets filters
since 1975. Challenger claimed better breathing and more HP for
the Cheetah with their new air filter. I was skeptical that the
Brackett could be improved upon so I tested them against each
other myself. I took a Cheetah airbox and sealed it up so that
we could install each filter and suck air thru them with two
shop Vacuums. I connected an airspeed indicator static port to
the airbox so that it would read negative pressure. The lower
the airspeed the less the pressure on the Carburetor side of the
filter. We removed and installed the filters several times to
check for consistent readings. The results were Challenger 39
MPH, Brackett 53 MPH. Challenger won. I don't know what that
translates to in MAP, probably a very small fraction of 1"
Mercury. A standard MAP gage showed no difference. We used a
airspeed indicator because that's the only instrument I had that
was sensenstive enough to indicate a change. I wanted to see if
there claim of less resist