I know one former modified production racer that used the original Moroso 3 quart accumaletors(SP?) in his SB Chevy, one of those guys that would drain one quart of oil out for the final race, replace the rod bearings after that race racer Rick Hauser actually He said that the accumalator was worth a little bit, he didn;t say exactly how much, of ET compared to not using it, he would not add any oil to the sump when using it I had one that I never used I sold it to a local racer that was having pressure loss problems and that cured it mostly, he needs a better oil pan, 572 CI all out bracket motor that makes 800 + HP at 7300 RPM I am going to buy a another three quart unit and use it as advertised to add three quarts to the system to my next all out high HP race motorMy current 1970/71 six quart street hemi pan is marginal in the 1/4 mie tracks, if I let it get a little bit low (3/4 of a quart or more)the oil pressure will drop when I let off on the other end