Date: Sun, 27 May 2001 09:45:01 -0700
Reply-To: David Marshall <vanagon@VOLKSWAGEN.ORG>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Marshall <vanagon@VOLKSWAGEN.ORG>
Subject: Re: Air Intake Project
In-Reply-To: <5.0.0.25.2.20010527025826.00a38eb0@popd.ix.netcom.com>
Content-Type: text/plain; charset="us-ascii"
You are getting the right idea, but, the wasserboxer isn't a modern Honda
engine! I wouldn't worry about the mandrel bent pipe as the engine isn't
being starved for air and a small restriction in the pipe won't cause a
problem that you should be worried about (with this engine). The biggest
restrictions are the AFM and the throttle body as they are very small. What
I would focus on is getting COLD [read more dense] air into the intake
system. This is the easiest way of getting 'more' air into the engine.
Switching to carbs would still give you problems as you still have to deal
with hot engine air and the restrictions in the air intake manifolds. I
have been experimenting with running the air intake up to the vent on my
westfalia, but I am concerned about if it is a high or low pressure zone.
Something they forgot to mention in that article is each bend introduces a
drop in air pressure - even with the mandrel bending.
Advancing your timing to TDC or a little before TDC will give you more of a
boost!
David Marshall - Volkswagen Enthusiast Quesnel, British Columbia, Canada
78 VW Rabbit [1.8L]
84 VW Westfalia with 105hp I4 [For Sale]
84 German Army VW Double Cab [For Sale]
87 Audi 5000 Quattro
87 VW Fox Sedan
88 VW Syncro Double Cab
David's Volkswagen Home Page
http://www.volkswagen.org <http://www.volkswagen.org>
Fast Forward Automotive Inc.
http://www.fastforward.ca <http://www.fastforward.ca>
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of wayout
Sent: May 27, 2001 3:46 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Air Intake Project
Hello
I am thinking seriously about trying to improve the flow of intake air by
replacing the stock air filter box in my 85GL.
Mostly using the fabrication guidelines from this webpage
http://www.teamdelsol.com/howto/coldair/diycoldair.htm
Basically the idea is just running a section of mandrel bent steel or
aluminum tube from the AFM to the bottom of the passenger side engine
compartment vent, and installing an appropriate K&N airfilter on the end of
the tube that hides in that little hole (where the original air filter tube
went),
in theory this would improve things by:
- NOT trying to force the air diagnally through that stock square box
anymore... instead, letting it get a good running start down the section of
tubing before it goes through the AFM
- Using a less restrictive K&N style filter
- it would continue to draw intake air out of the cold(er) air coming down
the engine compartment vents
Theres a few questions running through my brain about this...
1.) How would I figure out the right diameter of pipe to use for this?
2.) How to attach the new intake tube to the AFM....I wonder if could have
the new piece of tubing welded to the AFM? Is there a better way?
3.) Is trying to get "cold air" and build velocity by using a long piece of
tubing routed to the bottom of the vent a worthwhile endeavor on a Vanagon?
.....Or is this whole thing just retarded, and I should just throw a K&N
filter in that big bastard, stock, air filter housing?
That stock thing CANT really be a good intake system can it? It doesnt
really make sense that air would really flow through it very well.
Thanks for you input folks...
Jason Loewenstein
Marysville / Tulalip, WA
85GL
