Dave Leonard tells me his VDO pressure sensors are
 not living more than 20 hours so he is replacing
 them with a mechanical oil pressure gage.
 Needless to say the oil pressure is critical to the
 life of the engine as well as Tracy's gear box.

 These are AN -3 brake lines but they will work as a reliable
 and robust oil pressure gage connections for  a MC Master
 1.5 inch OD oil pressure gage. Yes one and a half inch
 outside diameter oil pressure gage.

 https://www.pegasusautoracing.com/productselection.asp?Product=3

 You will need a jic steel NPT 1/8th pipe adapter to the
 gage and to the -4 an line.

 We are not happy with the automotive oil pressure gage
 and it's nylon lines that are in there now.

 Paul Lamar

 Paul,

 Found a 200 psi, liquid filled 1.5" gauge at "Surplus Center".........Price is right..........Would
 need to order several items to make shipping worthwhile.............Link below

 http://www.surpluscenter.com/item.asp?catname=electric&qty=1&item=21-1667


  Kelly Troyer   
 "DYKE DELTA JD2" (Eventually)
 "13B ROTARY"_ Engine
  "RWS"_RD1C/EC2/EM2
  "MISTRAL"_Backplate/Oil Manifold
  "TURBONETICS"_TO4E50 Turbo