Date: Mon, 14 Mar 2005 01:04:51 -0500
Reply-To: Jonathan Farrugia <jfarrugi@UMICH.EDU>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jonathan Farrugia <jfarrugi@UMICH.EDU>
Subject: Re: Digijet ignition clarification Q
In-Reply-To: <20050314004111.34822.qmail@web53506.mail.yahoo.com>
Content-Type: TEXT/PLAIN; charset=US-ASCII
what are your vacuum readings? the gowesty 2212 i installed with the BIG
cam they put in it had similar sounding symptoms. that install used
digijet injection also. that engine produced very low vacuum and had idle
problems. that engine had to be way over advanced to the 2.1 timing
specification because gowesty never tested it with digijet injection but
sold it as a direct replacement for the 1.9! lucas from there has since
said that it can all be fixed with a new $300 ecu :(. so much for drop in
replacement i say. that engine also pinged when it was advanced to the
2.1 settings like they told me to do. a recipe for a short engine life
span in my opinion.
jonathan
On Sun, 13 Mar 2005, Damon Campbell wrote:
> Hello List,
>
> I was playing with the timing today, as i had a bit of
> a high idle and the timing set to 5*BTDC. My 2.3wbx
> is just a stroked out 2.1, and to make things more
> exciting, it is using the 1.9 ignition system which
> means it has a vacuum advance. I wished to readjust
> the timing due to the high idle and a light ping under
> hard accelleration. Several things i noticed today:
>
> 1) when set to 5*BTDC, the idle was around 1100, and
> the engine would typically not drop right to that
> number... it would stay higher at, say, 1400-1600, and
> then gradually come down. Power was good, and
> off-idle strong. This is how it has been running for
> the last month.
> 2) I pulled out the Bentley and adjusted to spec
> (5*ATDC with idle stabilizer disconnected, and engine
> speed set to about 850 rpm - the idle speed adjustment
> screw about 1/8 turn from all the way in).
> 3) After i adjusted per bentley, i disconnected the
> vacuum lines from the dizzy, and saw a 10* change).
> Idle speed rose by a couple hundred RPM. The idle
> stabilizer was still disconnected.
> 4) Reconnecting the vacuum lines and idle stabilizer,
> the engine now idles at about 950rpm, but seems more
> inclined to stall off-idle (not that it is bad, mind
> you... just not as good).
>
> I am wondering if the presumably higher vacuum pulled
> from the stroked out engine would affect the stock
> settings given by the Bentley. Asked another way,
> does the vacuum canister react proportionately to the
> vacuum, or is it just a pre-set on-off thing at idle?
> Secondly, what state is the idle stabilizer trying to
> maintain? Is it just trying to maintain a certain RPM
> by adjusting the timing?
>
> Thank you for any insight into the Digijet ignition
> system,
>
> -Damon
>
> '84 Westy "The Van" w/2.3L WBX
> Vancouver, BC
>
>
>
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