After eyeballing the space between the valves on the Petteroid head. Is there room for just one hardened valve seat for the exhaust and run the intake on the bare casting? Or is the solution to sunk valve seats is just cut fresh seats and plane the head to "raise" the seats? This one's down 84 thou on the exhaust.

  I just received a quote for #6 fuel oil delivered and it's 2/3 the price of furnace oil........... #6 should burn just fine if handled like waste vegetable oil with pre-heating and 220F coolant temps?. Yes, no maybe?

  Anybody going to the Farm Show on Feb 5,6 or 7th in Toronto?

  Depending on rpm, cylinder head design, crank stroke, intake air density & temperature, swept volume of the cylinder etc. What are some "ideal answers"?
  There must be a sizable difference in the temperature and pressure of the air in the combustion chamber just prior to the fuel injection event. Varying just with engine rpms alone?
  Wouldn't winding a Lister CS up from 600rpm to 1000rpm make the combustion chamber air hotter and easier to vaporize the heavier fuel oils? 
  With the compression valves on a CS Lister. So what happens if they are not backed off after starting the engine? Isn't the engine built beefy enough to handle high combustion chamber pressures? Isn't thermal efficiency going to drop when the mechanical compression ratio is dropped?
  I know of two freshly rebuilt 2-53 Detroit Diesels in tractors around here. One has the old S series 17 to 1 pistons.The other built with the later N series 21 to 1 pistons.  Both engines run well enough but the 21 to1 engine has a decidedly better cold start capabilities,smokes less at idle and makes more power. It does however have a notable diesel "knock" compared to the 17 to 1 engine.   

  I just seen a 6HP or so original British built Petter AV1 with the Krislar name in the castings? It's complete, not bashed up and runs smooth under load without smoke. It was supposed to have been one of the last three new petters shipped into Ontario from England, so the story goes. It's been running a milking machine since the 1970's. Being upgraded by a Yanmar to run a larger milking machine and cooler with the convenience of electric start.  $250.00 cash.
  A Krislar Petter?

  The Father-inlaw has the remains of five engines and has put the 1st of 2 or 3 together. It's a hand crank on the cam like a Petter. One large flywheel like a Petter too.
     A few whirls, a putt and a snort and away she went. Runs smooth at 1200rpm. ( strobed the three spoke flywheel to the flourescent shop lights) A little bit of vibration when wound up to 1500rpm or so.
   Three of the engines even have a ring gear on the flywheel. The cam driven injection pump looks similar to what's used on most of the small diesels of that era.
  The push rods operate inside an enclosed tube.

  What all kinds of exhaust heat exchangers are in use on the Listeroid and Petteroid co-gen applications?
  I like the price and simplicity of a couple lengths of copper pipe, a couple of T's and a couple of reducers. And the soot can be cleared with a copper circular brush on the end of a length of rod chucked in an electric drill.