[T3] Lean Cruise

[Keith Park]

Well, the D jet can apply a super lean condition to light throttle if you
get the inner stop on the pressure sensor adjusted wrong, and I guess this
has lunched engines in the past.  Im not sure exactly how this would compare
with your profile, but its something to be careful about... you don't want
to hear any knocking and pinging and on a square anyway, its REAL easy to
hear that if its occurring with the engine lid off.

Just keep an eye on the oil temp and more importantly the head temps.  You
may be able to get away with things at altitude that we cant at sea level.

One thing I CAN say, some of the D jet "experts" get it wrong sometimes and
Have gaps in their knowledge as well.

Keith


Top Notch Restorations
topnotch at nycap.rr.com 
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback "Hothe"
65 Notchback "El Baja Rojo"
65 Squareback "Eggcrate"
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93 RX7 "Redstur"


-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Max Welton
Sent: Friday, March 08, 2013 7:36 PM
To: type3 at vwtype3.org
Subject: Re: [T3] Lean Cruise

--- On Fri, 3/8/13, Keith Park <topnotch at nycap.rr.com> wrote:

> Ya know, this was discussed when I
> was setting up the D jet for the 2056,
> the consensus was that you wanted to AVOID the lean running
> condition under
> light throttle and the Dcel valve and or the vacuum retard
> was there to do
> that.
> 
> Unfortunately, I don't remember most of the details as this
> was several
> years ago but it should all still be on the Samba under the
> Djet experts
> thread.
> 
> Perhaps our cooler running T3 engines are more tolerant of
> that than the T4
> ones, but Id still be leery of it.
> 
> Keith

I have no idea if D-jet can apply different AFR rules to different load
conditions as I am doing. If not, I can't see how the D-jet expert consensus
would apply to my engine. 

I've asked around a bit (both here and on samba) and none of the D-jet
experts was able to say what sort of AFR profile D-jet applies. But they are
all quite certain I'm killing my engine. Go figure.

In about a month I'll be making another drive to Phoenix. It will be the
first time out of the mountains since I added the second barometer.

Max Welton
http://www.maxwelton2k.net/
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