Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!houxm!hogpc!houxb!hrs From: hrs@houxb.UUCP (H.SILBIGER) Newsgroups: net.auto Subject: Re: Another question on blowers Message-ID: <339@houxb.UUCP> Date: Thu, 9-Aug-84 16:17:47 EDT Article-I.D.: houxb.339 Posted: Thu Aug 9 16:17:47 1984 Date-Received: Fri, 10-Aug-84 02:40:01 EDT References: <168@wjvax.UUCP> ihuxk.709 Lines: 15 I notice that the terms "blower" and "supercharger" are being used interchangeably. These used to have different meanings, to wit: a supercharger used a centrifugal turbine, and a blower used a two-lobe pump. All current passenger car superchargers are of the centrifugal type. The turbo refers to the driving mechanisn, which is a exhaust air driven turbine. The blower was usually driven mechanically from the engine, and was usually a Roots blower. At present the familiar 2 cycle GM diesels used in buses and large trucks still use a Roots type blower. Herman Silbiger