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,
   Are you familiar with the trouble almost ALL 3rd gen 13Brew engines
   had with
   their oil pressure senders/gauges? I've had 4 fail. Remote mounting is
   one
   answer (with good grounds). Also aftermarket senders don't seem to be
   up to
   the start up pressure and leak soon after new.  I always have a back
   up oil
   pressure gauge in my rew's.
   Also, the threads on the block are something odd.
   Marc Wiese

   I think those threads are 1/8th NPT. That seems to work.
   Larry Child looked at the sender and instantly recognized 1/8th NPT.
   I assumed it was metric but no.... it is 1/8th NPT.

   The high start up pressure was the reason I choose a 200 PSI
   gage.

   Paul Lamar


IIRC, some RX7s use a 1/8" BSPT or 1/8" JSPT (can't remember), it is
slightly different than 1/8" npt.
I can't remember if the BREW is the same.  It may have changed at some
point.

Cheers
Cary
----------------------------------
3rd gens -rewtt- (93-2000) for some reason DID use the British Standard Pipe
threads! You are correct! 1/8 npt will wobble a bit if threaded in.
Marc

--


Marc,
That is British STRAIGHT Pipe thread. It isn't tapered like NOT.
Bill Jepson


Stupid auto correct I meant NPT,  National Pipe Thread, not not!
Bill Jepson