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

Paul,

Injectors are already ordered.I am using that gauge for monitoring the
cooling system.The EFIS that I am going to install on the plane will be
monitoring the manifold pressure.

Michael

I like steam gages. If one goes out no big deal.
If your efis goes out you are in serious doo doo :)
Most are hard to read in bright sunlight not to mention
high priced. The work of installing the sensors is
the same. Not only all that few to none are set up
for the rotary. For example no water cooling.
Also some lack oil temperature.  There are several unique
parameters we need when monitoring the rotary.

Nice things to have is temperature into and out of
the oil cooler. Same for the water cooling system.

Think about it carefully before you jump.

Paul Lamar