information supercharger rotors weiand uses two types of supercharger rotors ... the 142 through 6-71 superchargers use new not ... designed to hold their tolerances 360º for maximum boost pressure efficiency two ... up less area in the case this allows for a more compact package for easier ... installation in many applications weiand s 8-71 superchargers use remanufactured ... rotor was developed by general motors for larger gmc superchargers helix rotors ... superchargers use larger cases allowing for a greater volume of air displacement ... more power these blowers were developed for alcohol dragster and funny car racing ... expensive making them impractical for anything but professional racing the ... not justified by the increase in cost for street applications table 1 ... volumes supercharger type pro-street 142 144 pro-street 174 177 pro-street 250 ...
marine ignition systems most mercruiser ... also has 10 degrees of initial timing for a total advance of 34 degrees for the ... average supercharged marine engine this is too much total advance ... using boost timing retard devices in marine applications retarding the timing under ... a street vehicle this typically occurs for short periods of time in marine ... pitch can be increased one inch for each additional 300 rpm the engine will ... turn at full throttle for example if the stock engine topped out ... this tendency to cavitate maintenance weiand superchargers require little in the way ... the unit should be overhauled call weiand technical service for details regarding ... retard device is not recommended in a marine application since a boat engine is in ... to optimizing the ignition system for a non-boost condition it is much better ...
