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Old 12-31-2010, 05:34 PM   #21
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The new yellow RX8 injectors are 440cc and the ones you want. I'm pretty sure they are all the same (all HI imp) and all fit the same.

This. They atomize better.
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Old 12-31-2010, 06:19 PM   #22
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The o-rings that seal the water ports to the manifold are known on the turbo motors to leak. Also when you unbolt your intake manifold you drain the coolant out of the engine witch means you now have to bleed the coolant out. On the FD rx7s the ports are blocked from the factory when there cast. They found there is no real need for them.
Actually the ports from what I've heard from a really reliable source is for anti-icing, from the same source, he said that the 13B 6-port rotary has those blocked from factory, thank god I don't have to deal with that.
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Old 12-31-2010, 07:15 PM   #23
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You are lucky lol and your source is right that's what they where meant for.
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Old 01-01-2011, 05:29 AM   #24
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You are lucky lol and your source is right that's what they where meant for.
Yeah well I've been known to be lucky from time to time. Also I've secured a set of Yellow RX8 Injectors for 100 dollars, just waiting to get them.
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Old 01-01-2011, 11:13 AM   #25
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Nice cant wait to see what you find.
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Old 01-01-2011, 01:11 PM   #26
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Right now I'm trying to figure out the fuel pressure, I'm having a hard time finding stock fuel pressures at the fuel injectors for the RX8 and what the fuel injectors flow at those pressures.
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Old 01-01-2011, 01:22 PM   #27
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they are rated at 420cc at 43.5psi...the rest is simple math.

I bet they are run at 60psi on the motor.
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Old 01-01-2011, 01:25 PM   #28
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the last pic is just a teaser but the first one shows the freeze plugs installed.
What is going on in this pic? I see both velocity stacks and a turbo?
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Old 01-01-2011, 01:27 PM   #29
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those are the TBs...we can assume the IC plumbing would go to them...
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Old 01-01-2011, 01:30 PM   #30
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You are right sir.

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Old 01-01-2011, 04:27 PM   #31
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Gryffin,

If you are wanting to use the newer style Denso injectors. Let me know. We have them in 440cc and 600cc (as well as, 800cc/1000cc/1300cc).

http://www.deatschwerks.com/catalog/...roducts_id=240

The ones you looked up for the FC would be direct fitment Lz injectors.

-Chris
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Old 01-01-2011, 07:00 PM   #32
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Gryffin,

If you are wanting to use the newer style Denso injectors. Let me know. We have them in 440cc and 600cc (as well as, 800cc/1000cc/1300cc).

http://www.deatschwerks.com/catalog/...roducts_id=240

The ones you looked up for the FC would be direct fitment Lz injectors.

-Chris
Already got a set of 4 - RX8 Yellow Secondary Injectors for myself. Thanks for the info though.
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Old 01-03-2011, 07:49 AM   #33
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Also if someone has any available data comparing the 2 injectors at same fuel pressure, as well atomization differences, that would be great as well. Any data that you guys have, I could use it.
Hi,

my 460cc RX7 are messured at 3bar fuel pressure with 480cc.
I had some hot start issues and changed to the RX8 450cc, because the hot start was better with the newer injectors.

The RX8 injectors are messured at 3,1bar fuell pressure with 450cc:
http://www.ilmotorsport.de/shop/arti...541d8cfdc3f22e
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Old 01-03-2011, 02:26 PM   #34
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Hi,

my 460cc RX7 are messured at 3bar fuel pressure with 480cc.
I had some hot start issues and changed to the RX8 450cc, because the hot start was better with the newer injectors.

The RX8 injectors are messured at 3,1bar fuell pressure with 450cc:
http://www.ilmotorsport.de/shop/arti...541d8cfdc3f22e
Was there any differences in the fuel pressures that you ran with the RX7 injectors and the RX8 injectors and did you see any differences in AFRs?
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Old 01-05-2011, 10:32 AM   #35
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Was there any differences in the fuel pressures that you ran with the RX7 injectors and the RX8 injectors and did you see any differences in AFRs?
Fuel pressure was the same.
I tryed not only 460cc and 450cc... Last time i changed from 360cc to the 450cc and used the 460cc RX7 map. I canīt say, if there are big changes because i use permanent autotune with my Greddy Ultimate. If there were differences the autotune function fixed it quick.
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Old 01-06-2011, 11:51 AM   #36
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Fuel pressure was the same.
I tryed not only 460cc and 450cc... Last time i changed from 360cc to the 450cc and used the 460cc RX7 map. I canīt say, if there are big changes because i use permanent autotune with my Greddy Ultimate. If there were differences the autotune function fixed it quick.
Hmmmm, what's your over all opinion and experience between the RX7 460cc and the RX8 450cc injectors?

What was the fuel pressure you were using, do you have the number for that?
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Old 01-06-2011, 12:20 PM   #37
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omg. just put them in already, use stock pressures and go.
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Old 01-06-2011, 12:56 PM   #38
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omg. just put them in already, use stock pressures and go.
Is that a good idea, stock fuel pressures on a 1988 Mazda RX7 is around 36 psi.
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Old 01-06-2011, 01:14 PM   #39
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At idle? or constant?
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Old 01-06-2011, 01:26 PM   #40
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At idle? or constant?
That's what the FSM says the FPR is rated at.
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