Date: Mon, 3 Sep 2007 01:01:57 -0400
Reply-To: "T.M." <tinkerman007@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "T.M." <tinkerman007@YAHOO.COM>
Subject: Re: 1990 2.1L Digijet European Caravelle wiring diagrams
On Thu, 30 Aug 2007 23:46:09 -0700, Bob Donalds <donalds1@VERIZON.NET>
wrote:
>Tinkernam 007 or Mr. Bond
Your pick...
>I have some background on this The European 112 Hp engine it had a10 to 1
>compression ratio this by it self would I have come to understand
> accountedfor approximately a 4 % increase in power IF you had 98 octane
> fuel to go with the 10 to 1 compression ratio.
We do, although it's more expensive.
> The European digijet 112 HP engine Also
>was not set up for a O2 sensor due to the fact that the Gas intended for
>this application was leaded fuel O2 sensors and leaded fuels dont mix
well.
Right.
>No O2 sensor is the major difference in the wiring diagram best as I know
Well, after thorough reading in my Haynes manual (European models only,
with approximate wiring diagrams) as well as cross referencing many
sources, I concluded that my 2.1 1990 Digijet is some weird combination of
the US Digijet and Digifant models - It has a Digijet ECU, whereas the ECU
is responsible only for fuel injection (while the ignition is generated
directly by by the signal from the hall sender in the distributor and the
coil driver circuit, with ignition advance done by vacum feedback into the
distributor mechanism which moves the hall sender relative to the rotor),
as opposed to the digifant system where both the fuel injection as well as
ignition are handled by the ECU.
The quirk is that my Digijet system has an Idle Stabilizer Control unit
(ISCU) and Idle stabilization valve on top of the motor just like the US
digifant models, that set idle by adjusting air supply to the engine,
while the US Digijets (up until 1985) had a different ISCU that work on a
different concept, by modulating the hall generated ignition pulses (and
not the air) to set the idle - it's those units that you can bypass by
disconnecting the connecters and joing them together.
> I have also spent mega bucks on chassis dyno testing
Interesting to hear real-world results.
>That difference was that I never used the insulators
>for the fuel lines in the Campa big valve engine. Think what you want but
I
>have had many years of dyno testing and have seen what a difference in
fuel
>and engine compartment temp can do to power.
Interesting!
>And in every piston I
>have seen from a Dj 10 to 1 piston it had signs of detonation from the
lack
>of octane. Signs of detonation as I define them are flecks of piston
missing
>from the tops of the piston like to was on the receiving end of a shot gun
>blast. Just email me if you feel the need to see what that looks like and
I
>have a pic or two that I can send you
Yup, I'd like to see, although we do have 98 Octane, although due to the
prices I'd rather tune the engine to 96 Octane (mentioned in the Bentley
IIRC) and avoid the detonations.
>hope this helps
Yep, quite interesting.
>Boston Bob
>Boston Engine
So you're the famous BB? :-)
>----- Original Message -----
>From: "TinkerMan" <tinkerman007@YAHOO.COM>
>To: <vanagon@GERRY.VANAGON.COM>
>Sent: Thursday, August 30, 2007 3:15 PM
>Subject: 1990 2.1L Digijet European Caravelle wiring diagrams
>
>
>> Hello again,
>>
>> I happen to own a 1990 2.1L digijet fuel injection
>> wasserboxer, engine code DJ. It's a European version,
>> where these were manufacured till 1991 and called
>> Transporters, or Caravelles for the deluxe models,
>> while in the U.S. digijets were sold only till 1985.
>>
>> I've purchased of course the Bentley service manual
>> but it's quite confusing, as it seems my fuel
>> injection system is a hybrid of the older Digijet
>> (only fuel injection is computer-controlled) and the
>> later Digifant (whereas also the ignition).
>>
>> Also, since it's a late model, many of the other
>> electrical circuits (e.g. A/C) are similar to the
>> later Vanagons, not the 1985 era Digijets.
>>
>> Talking with Bentley support didn't help because they
>> have no info about the European models, and although I
>> also have a Haynes (European) manual too, it's much
>> less in-depth than the Bentley and also has much less
>> wiring diagrams, most of them even mentioning they're
>> only "typical" and not completely accurate.
>>
>> Does anyone on the list have an official European
>> Transporter/Caravelle service manual and can help me
>> get the correct diagrams?
>>
>> Thanks a lot.
>> TM
>>
>>
>>
>>
___________________________________________________________________________
_________
>> Be a better Globetrotter. Get better travel answers from someone who
>> knows. Yahoo! Answers - Check it out.
>> http://answers.yahoo.com/dir/?link=list&sid=396545469
