Racer Brown ST-21
But as i stated above is 286 duration or 254?! its about 12 years old. I know the real Racer Brown passed away and his right hand man took over. The Fabo link states it is from a old DC catalog. So the the cam could have been tweaked over the years? Maybe i should just call RB tomorrow.
Well, wouldn't you know it. I have Racer Brown cam cards for the SS-12, SS-23, EH-8, STX-22-105, X-107, 123-R-105, SS-H-9, SS-H-25, ST-12, ST-14, ST-15, ST-20, BUT NO ST-21.
I can tell you this though, the ST-21 is 286/286 degrees @ .017" lift and .520/.520 lift @ 1.5 rocker arm ratio. Racer Brown used .017" as the measurement for the advertised duration on all the ST series. Racer Brown wasn't shy about accelerating the lifter. So, it is most likely, 254 degrees @ .050".
His 1979 catalog lists cams in four catagories; street, street/strip, track and competition. The ST-21 is listed under "track".
I'd run that sucker, it should fly! I ran the ST-12 294/294 advertised and .485/.485 lift in a 1971 340 Challenger and it was a rocket. With 3.55 gears and G60-15 tires, it wouldn't even think about hooking up if I launched it over 1000 rpm.