Date: Sun, 28 Nov 2004 10:34:13 -0600
Reply-To: Stan Wilder <wilden1-1@SBCGLOBAL.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Stan Wilder <wilden1-1@SBCGLOBAL.NET>
Subject: Re: Intake air flow, improvement possible?
Content-Type: text/plain; charset=iso-8859-1
My old 280Z had a plenty big intake system from the valves to the throttle
body, where (for
various reasons related to CA smog requirements and also smooth, "civilized"
engine response) it pinched down some 15% in size. Replacing it with a 60mm
unit added a significant boost to the mid and high end numbers (and
DEFINITELY made it less "civilized"). Basically, you can't just assume that
the engineers who built the system spared no expense and considered
nothing else but airflow when they designed the intake system, because
that's seldom the case. John Bange
'90 Vanagon "Geldsauger"
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The general public seldom realizes that engineers have catalogs in their
library that has specifications for almost every known automotive and
industrial product ever produced.
They select engine bearing sizes that are already in production.
They select clutch cover plates and disks that are already in production.
They do the same choosing for Fuel Injectors, Fuel injection systems and it
continues on into brake calipers, brake boosters etc.
They select ring and pistons and even connecting rods the same way.
After a few years of production the engineers may design a proprietary part
to correct or improve an unsafe situation.
With US Made cars I recall that 1965 through 1995 1/2 ton Chevy trucks all
used a great many brake boosters and master cylinders that were all about
the same.
If you get into blower motors, switches, dome lights, clutch discs you'll
find same parts that are many generations old.
They just don't reinvent the wheel with every new model introduced.
Back when FI was a new feature there wasn't much competition so every body
went to Bosch and they came back with a "Will Work OK" system for them.
Later Japan copied the technologies and started making their own but you can
be assured that even parts that say Honda or Toyota on it was produced by a
single subcontractor. That's just the way it's done.
The term 'Nothing is better than Cubic Inches' just tells me that we have a
lot of room for poor quality and poor design if we have big inches to hide
the flaws in Injection, Cam Design etc.
With new Japanese cylinder heads having as many as five valves per cylinder
and dual overhead cams with Gilmer notched belts the engines have a self
destruct feature built right in.
It's only the simpler VW boxer design that has kept so many VWs on the road.
Economical repairs and maintenance that the owner can perform are the key.
When you go astray of the simple VW technology you can expect that you've
built in your next engine failure.
Stan Wilder
Engine Ceramics
214-352-4931
www.engineceramics.com
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