Date: Thu, 7 Apr 2016 21:22:28 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Subaru 2.2L Conversion and Vanagon Evap Canister Integration
In-Reply-To: <5DC75BCC-AF4E-42D5-8B37-D4E5EA70A7AB@cox.net>
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NOx is the major issue making engine conversions a compliance nightmare. The
EVAP system has nothing to do with it. The Waterboxer used a combination of
low compression and conservative ignition timing along with the piston
design and other features (including the low gearing) to deal with NOX. For
the Subie you don't have much to adjust. Most likely a new catalyst will fix
it. Don't be cheap on this or you will fail again in a year. Get the GoWesty
CARB approved cat. When you compare to one of those $125 specials the
difference is obvious. Also are you running stock size tires? Larger tires
and taller gears will increase NOx emissions.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Cox Home Email
Sent: Thursday, April 7, 2016 10:35 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Subaru 2.2L Conversion and Vanagon Evap Canister Integration
I have an '89 Vanagon GL Camper, A/T, with 1992 Subie 2.2L KEP conversion.
I was educating myself on the Vanagon and Subie engine emissions systems and
discovered that the evap canister hose connections were not per KEP. The
bottom hose was just routed into the adjacent frame and canister valve lines
(purple and white) were not connected to engine vacuum per KEP.
I've learned that the canister bottom hose routing to the frame is factory
(?). What I don't understand is why the Vanagon evap system is not per KEP
as the engine conversion is supposedly CARB certified. I know, this is a
question for the PO. No answer yet.
So I dutifully connected the evap system the way KEP instructs.
I go for emissions testing (Phoenix AZ) and fail for high NOx.
Is it anyone's opinion that it is just coincidence or does connecting up the
evap system per conversion instructions have anything to do with NOx
readings? No vacuum leaks as far as I can tell.
Can't readily interrogate the ECU as CEL does not respond. (Something else
that should be working for CARB certification I believe.
The 1992 Subie does not have an EGR system to deal with the NOx. I'm
replacing the catalytic converter and see what happens.
Any thoughts or suggestions are appreciated.
Frustrated but optimistic in AZ.
Kent Malcolm