Michael,

  You will need to order 4 RX8 yellow injectors.

  Paul Lamar

  Paul, I also found these GB reman. for great price.What do you think of
  them.


http://www.autopartswarehouse.com/shop_parts/fuel_injector/mazda/rx-8.html

  Michael

  I would find the best price on new ones as the nozzle wears.

  Doug Fir likes these Seimans.
  They will also fit.

  Paul Lamar

  Paul I went online and looked at the Siemens injectors.The specs on some
  of these look great.Can you tell me which model will fit the
  manifold.Thanks.

  Michael


  I don't have the catalog but the physical size I think are all the
  same. The main issue is getting enough flow for full power.
  The flow is given in pounds per hour. 60 pounds per hour
  is about 9.6 gallons per hour for each injector at 43.5 psi.
  Total would be 38.4 gallons an hour. At 350 HP a rotary
  would be sucking down about .6 pounds per hour per HP.
  So .6 times 350 is 210 pounds per hour. Fuel weighs
  6.25 pounds per gallon so that is 33.6 gallons an hour.
  These injectors would work fine. Of course you are
  not going to need 350 HP. I think you will get
  about 200 HP maximum at 85,000 turbo RPM and with the
  waste gate open at sea level. Hopefully you will also get
  that at 12,000 feet with the waste gate closed. I see you have
  a slick little vacuum/boost gage which will tell the whole story.

  The injectors are pulse width modulated so that is how
  the computer controls the flow. This Paul Yaw flow chart
  assume the injection is timed to the intake opening IMHO and
  that is why it is limited to 9 ms. I suspect Tracy's is not
  timed injection so there is no real limit on how long an
  injector can be open. It could be open 20 ms and off
  2 ms or vice versa. On 2 ms and off 20.

  BTW the Garrett turbo tach is here.

  Paul Lamar

Paul Can you look at this link
http://www.fuelinjectorconnection.com/shop/index.php?_a=viewCat&catId=31
and tell me which ones will be the best.How about the 220 lb set of 4
for $159 including flow matching or are they too much.Ya I really like
to monitor the cooling pressure it tells a lot than just the temp.

Michael


Should be 240 pounds. Set of four 60 pound units.
Here is a screen shot.

I thought you were going to use that for boost and manifold pressure.
It is good you have it for the cooling water pressure but you could use another
one just like it for manifold pressure.

Paul Lamar