Date:         Mon, 23 Jun 2008 19:13:22 -0700
Reply-To:     Kim Springer <kimspringer@RCN.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Kim Springer <kimspringer@RCN.COM>
Subject:      DJ Compression Ratio
Content-Type: text/plain; charset="iso-8859-1"

Everyone keeps stating that the DJ Engine CR is 10:1, 10.5:1, etc.

I carefully measured my DJ engine and it was 9.65:1. MV is 8.65:1.

If you want to round up to 10:1, so be it, but, when it comes to compression
ratios, 9.7 is a long way from 10.

Kim


----- Original Message -----
From: "David Marshall" <mailinglist@FASTFORWARD.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, June 23, 2008 9:06 AM
Subject: Re: 25 MPG Wasserboxer!


> Your engine management system sounds  the the same as the European
> 112hp "DJ" wasserboxer, which I always found ran better than the
> "MV" system we have here.  They ran these with 10.5:1 cr
> pistons and I think 12 BTDC timing, but required the use of premium fuel
> to do this.  I ran mine, for the little bit of time they were in
> there before swapping to TDI, at 3 BTDC and regular fuel and never had a
> problem.
>
> I think I averaged about 12 to 13L per 100km at
> 100km/h when driving these.
>
> David Marshall
>
> http://www.hasenwerk.ca
> Box 4153, Quesnel BC, Canada V2J 3J2
>
> Engine Conversion FAQ - http://www.hasenwerk.ca/faq
>
> On
> Mon, June 23, 2008 08:44, Mike Collum wrote:
> > Hi all,
> >
>
> > I put a Boston Bob 2.1 engine into my '85 Westy and, after the
> initial
> > break-in, drove it to Virginia, Tennessee, and North
> Carolina (I'm in
> > Virginia now).
> >
> > Anyway,
> because the engine was still fairly new, I kept the highway
> >
> speed down to a max of 51 (under 3,000 RPM) and didn't run the air
> > conditioner.  I avoided any fast starts and didn't lug the engine
> and by
> > doing so, I "Averaged" 24.92 miles per gallon
> (confirmed by GPS) from
> > Thomaston, Maine to Abingdon, Virginia
> which was just over 1,000 miles
> > with the route I took.  The
> inside of the van was pretty well loaded, too.
> >
> > For
> those interested in the configuration (I'll make a full
> > report
> on that after I get back to Maine), I'm using the entire 2.1
> >
> intake system (snorkel and all) with stock 1.9 wiring.  The 2.1 AFM
> > works great with with the digijet harness.  On the trip down, I
> used the
> > stock 1.9 ECU with a 1.9 distributor set to TDC.  The
> tires are 185 14
> > C2 Hakkapeliittas with 40 lbs in the fronts and
> 50 in the rears.  The O2
> > sensor was disconnected.
> >
> > I haven't accurately checked the gas mileage since getting here as
> I've
> > been using the air conditioner, changed to the 2.1
> "Digijet" ECU
> > (performance ECU) and have been doing a
> lot of mixed driving ... mostly
> > in town driving.  It appears
> that I'm only getting about 18 mpg under
> > such circumstances.
> >
> > Where I'm staying, I don't have an internet connection
> so communication
> > with you guys will be spotty at best.  We'll be
> attending the West River
> > Westies event in Vermont on the way
> home and won't be back in Houlton,
> > Maine until mid July.
> >
> > Mike
> > '85 Westy 2.1
>