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Path: utzoo!watmath!clyde!burl!hou3c!hocda!houxm!hou2h!an
From: an@hou2h.UUCP (A.NGUYEN)
Newsgroups: net.auto
Subject: Four valve heads
Message-ID: <341@hou2h.UUCP>
Date: Mon, 12-Mar-84 10:51:27 EST
Article-I.D.: hou2h.341
Posted: Mon Mar 12 10:51:27 1984
Date-Received: Tue, 13-Mar-84 08:35:55 EST
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 27

--
The new wave of performance is upon us folks.  No less than eight
European marques are working on 4 valve heads for existing or new
engines. They all feature very narrow included valve angles (a la
Cosworth). Last seen in "Automotive Engineering," Jan 84:

	- Jaguar: 4.2 liter (?) straight 6;
	- Audi: straight 5 for the Quattro;
	- VW (yeah!): 1.8 liter 4 banger for Scirocco GTI,
	  with (ta-daa) hydraulic tappets, but no mention of
	  Golf GTI (booh!);
	- Mercedes: straight four for the baby Benz, 4 valve
	  head done by Cosworth itself;
	- BMW: 3.5 liter straight six;
	- Saab: 2 liter 4 cylinder turbo (booh!);
	- Volvo: racing only (eegads, a wacing Volvo ?!);
	- Peugeot: ditto 1.7 liter.

Properly designed four valve engines can have the same peak hp as a
high strung, cammy, and generally balls out two valve designs (see
Euro-spec Golf GTI), but with gobs more midrange power (see Honda
Interceptor 750 V4 bike engine).

Are you listening Detroit ?!

	Au Nguyen