Date: Mon, 16 Apr 2001 20:10:20 EDT
Reply-To: FrankGRUN@AOL.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Frank Grunthaner <FrankGRUN@AOL.COM>
Subject: Re: When can I get Wasserboxer power graphs?
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David,
Would have replied sooner but I've been away from the terminal for more than
a week. There are several superb design articles on the waterboxer series of
engines. I will give the references in the following. I have meant to
translate these articles and offer them for posting at an appropriate web
site, but just haven't had the time. I get this subliminal urge whenever more
details of straightforward engineering improvements are offered on the list.
While these articles do not report exhaustive detail, the level of background
experimentation that lead to the chosen compromises is apparent. I can scan
them and send off copies to the immediately interested. Three primary papers
cover the waterboxer:
1). "Zwei neue wassergekühlte Boxermotoren für den Volkswagen-Transporter"
(Two New Water-Cooled Boxer Engines for Volkswagen's Transporter Van). Walter
Brandstetter and Reiner Dziggel, Motortechnische Zeitschrift 44 (2), 63-66
(1983). This article discusses key design criteria comparing the air - cooled
to water - cooled versions (carburated), giving power and torque curve
comparisons, fuel consumption plots, interior noise measurement comparisons,
power vs. spark advance curves and performance data tables.
2). "Zwei wassergekühlte Boxermotoren mit Benzineinspritzung von Volkswagen"
(Two Water-Cooled Opposed-Type Engines with Gasoline Injection from
Volkswagen). Walter Brandstetter and Reiner Dziggel, Automobiltechnische
Zeitschrift 85 (12), 719-722 (1983). This article details the development of
the fuel-injected version of the carburated engine and emphasizes the exhaust
system modifications needed to meet the US emissions regulations. There are
good engine cross-sections, power and torque curves, the fuel consumption
maps , timing and knock limit load curves, and air cooled engine comparisons.
All this for the 1.9 L engine.
3). "Der wassergekühlte 2,1-Liter-Boxermotor mit 82 kW für den
Volkswagen-Transporter" (The Watercooled Horizontally Opposed Engine with a
Displacement Volume of 2.1 Liter and 82 kW for the Volkswagen Van). Walter
Brandstetter and Reiner Dziggel, Motortechnische Zeitschrift 46 (4), 137-139
(1985). This paper reviews the main design modifications required for the
crank gear, mixture formation, ignition system, exhaust and cooling systems.
Again, there are good engine cross-sections, power and torque curves, the
fuel consumption maps , timing and knock limit load curves, and comparisons
with the 1.9 Liter engine.
Frank Grunthaner
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