Statistical significance does not provide information about the effect size or the clinical relevance. Because of that, researchers often misinterpret statistically significance as clinical one. On one hand, a large sample size study may have a statistically significant result but a small effect size.
An HEI distributor is an upgrade from a points-type distributor. ... Ford and Plymouth, installed four-cylinder engines in their cars.he increased efficiency of HEI distributors stemmed from the incorporation of the ignition wire into the distributor cap, reducing degradation of the spark and loss of energy potential.
Under the cap, MSDâs new ignition module. MSDâs new ignition module, built into the distributor, produces a 7.5 amp single spark at the higher RPM range and does not require an MSD ignition control box. Stock HEI modules start dropping sparks around 4,500 RPM.MSD Distributors have been spun over 10,000 RPM without dropping a single spark.igh performance upgrade to the stock HEI coil. For the traditionalist that must have an HEI inductive ignition system, or for the car owner that simply does not want, or doesnât have room to mount the extra external components, MSDâs new Ready to Run (RTR) distributor will fit the bill.