Paul,

  I measured the 2-pack injectors on the primary fuel rail when I got home
  tonight, Best I can tell, it is 1.0" center to center.

  Mark S.


  Well I guess it is a die cast housing which might be needed
  to feed the injectors. That makes it hard to make one with
  an ordinary mill. Here are some old dwgs and pictures of the
  fat injector holder. I made this one (one inch center to center)
   on my my cheap Chinese mill. Took lots of time.

  Paul Lamar


  Paul,

  Attached is a pic of the part of the fuel rail that I would like to cut
  off
  and use.  That may turn out to be a non-option, depending on whether or
  not
  I can find a spare fuel rail.

  If push comes to shove, I can always buy some Siemens injectors and use
  your
  injector blocks.  Or, go with some of the sdsefi.com injector holders and
  use my old injectors.

  Mark


  Those $40 sdsefi injector holders are pretty nice. Looks like you plumb
  each one separately. Will the fat one fit your injectors? It looks
  like a top feed. Any idea what the Kinsler injector holders cost?

  Do you have access to a mill? I have an idea that might work for you.

  --------------------------------------------------------

  The low cost trick is to buy 3 by 1 and 1/2 inch bar stock from
  McMaster so you don't have to do any milling on the outside.
  Have them cut it to about 4 inche long blocks.
  The hard part is setting it up in the mill at 30 degrees
  and using a fly cutter to cut the radius for the 2 inch tube.
  Everything else is straight forward drilling.

  The three blocks can be welded together with 1/2 inch OD
  3/8 ID aluminum tubing to form the fuel rail.  You may have
  to drill 1/2 inch rod unless you can find tubing that size.
  You could also bond it together with JB Weld like Tracy does :)

  Measure that injector for me and I will put some dimensions
  on the hole positions.


  Paul Lamar

  Paul,

  Yes, the sdsefi holdders are nice.  They don't appear to work with the
 side
  feed injectors, but I also have 6 of the normal 13b/20b 550cc injectors
  that
  I could use.

  Let me run this by my machinist and I'll get back with you.

  Mark

  BTw Mark if you use those side feed injectors and go to all the
  trouble to making a custom holder and fuel rail you could pay
  the piper down the road if one fails. I would not be a bit surprised
  if Mazda charged well over $100 while just about any other
  injector can be had for $50.

  Paul Lamar




 Good point... But I'm already running 3 of them in my current engine.
 Besides, Bob Mears gives great discounts.  ;-)

 Mark

 Your up early and I am up late :)

 Only three? They must be throttle body injectors. That means
 they are used in something else.

 Paul Lamar

Paul,
The 20b uses 3 side feed and three regular thru-feed injectors.  These are
the same injectors that I'm running in my Lancair.

With that said, I think I've decided to go ahead and order a set of the
Siemen's injectors so I can use your injector blocks.  Going by ebay prices,
it would run $300 for the injecots, plus your injector blocks.  All in all,
that's a pretty straight forward approach.

Mark S.
Austin

Too bad I just found a couple of those side feed injectors
up at the hangar :)

The injector blocks will be done this coming week Allah willing :)