[Vwdiesel] fuel use

Tue Jan 8 22:00:11 PST 2013

I found that at -30F, going down the highway, the heater on 2nd speed (usually seems to put out hotter air than on  high), There's not enough heat to keep the side and rear windows from icing over once the sun goes down.  Edges of the windshield too.
  The IDI's do pretty well at putting out heat but that same car wouldn't make heat at town speeds in zero-ish weather.  No heat went to the radiator either.  It was covered in unmelted snow.  
  The Passat TDI's do nicely for heat but haven't had any real cold temps since we got them.  The '02 Golf...  Well, it's a darn good thing it has heated seats!  It doesn't have the coolant heaters like the Passat and just doesn't do much for heat until you hit the highway.
  Since my older ones don't have A/C there's no recirc option.  Below about 15F to 20 F it makes a huge difference, on the cars that have it.
    Loren

-----Original Message-----
From: Tad <tadc at europa.com>
To: Val Christian <val at valchristian.com>
Cc: mailing list <vwdiesel at vwfans.com>
Sent: Tue, Jan 8, 2013 4:24 pm
Subject: Re: [Vwdiesel] fuel use

Wow, I have to say that this convo makes me glad to live in a place where
t never gets anywhere near 0F, and anything south of +20 is considered
real effin cold".
A few other thoughts:
   - I wonder if an IDI or TDI would make more cabin heat in extreme cold.
   On the one hand, it seems like the IDI would have more surface area (from
  the prechamber) to transmit combustion heat into the head that the TDI
  would presumably send out the pipe.  On the other hand, TDIs have gizmos
  like the EGR cooler and coolant glow plugs.
  - TDIs have a fine "snow screen" in the intake pipe (hidden in the
  fender), designed to prevent the filter clogging with fine snow, although
  it mainly seems to get clogged up with dead bugs and leaves(so many people
  cut it out).  It's bypassed by a springloaded door that opens up under
  heavy suction.
  - I don't see the benefit of carrying a *full* filter... I've done a
  parking lot filter change with nothing but a pair of pliers, screwdriver
  and length of fuel hose (which I attached to the filter outlet and sucked
  on to prime the filter from the tank).
  - You folks from arctic climates, when you talk about the car losing
  temp from just running the heater, is that with the cabin air set to fresh
  or recirc?
  - On a diesel, you shouldn't have to worry about Carbon Monoxide
  poisoning (blue fingernails) in a snowbound car.
  - It's interesting how various states approach tire chain enforcement
  very differently.  Here in Oregon, having driven over Mt. Hood, Willamette
  pass, and the Siskyous many times, I've never once seen any sign of
  enforcement when chains are "required".  In California, they set up a
  roadblock and check you before you can even get on the highway.

n Tue, Jan 8, 2013 at 1:51 PM, Val Christian <val at mongo.mongobird.com>wrote:
> One other thing, at 0F, a TDI at idle will not heat the car long term.
 If sunny, it may.  If sunny and still air, it will.  You will need more
 than just idle, and as the engine gets cold the coolant plugs fire up.

 An IDI will not keep the car warm at -10F at idle, with the blower on low.
 If you pull the cold start (timing advance and throttle increase) out,
 it may.  I have used cardboard folded to shim the stop on the IP
 to bump up the "idle" when in cold temps.  My IDIs were all non-turbo
 and a turbo might be different, but I doubt it.

 Also if in a storm be aware of ingestion of powered snow, which can clog
 the
 air intake and potentially suck oil, especially on a 1.5l.

 A possible approach to the filter matter would be to temporarily remove the
 filter.  There is normally not much silica in blown snow.

 I would also have a cut out milk jug or a shovel, because you will want to
 keep the exhaust free.  In Watertown NY snowstorms, that can become
 nearly fulltime work.

 If your fingernails and lips are blue, get out of the car...

 >
 > HI Folks;
 >
 >                 Does anyone have any Idea how much fuel per hour a 1.6
 > diesel would use at a continuous idle? Just wondering how long I could
 run
 > the heater if I was stuck in a snow bank in a blizzard. I have to cross a
 > mountain pass every other weekend from now thru March including a trip
 from
 > Western Washington to Georgia the middle of February.
 >
 > Brian Decker
 >
 > 1990 VW Fox 2 dr wagon with 1.6 turbo diesel
 >
 > 1983 Mitsubishi Mighty Max 2.3 turbo diesel  4/4 pickup
 >
 > 1981 Dasher wagon 1.6 N/A, 5spd
 >
 > 2 Rabbit pickups one diesel and one gas
 >
 > My wife runs a 1983 VW Rabbit GTI
 >
 > _______________________________________________
 > Vwdiesel mailing list
 > Vwdiesel at vwfans.com
 > http://www.audifans.com/mailman/listinfo/vwdiesel
 >

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