RX7 Injectors vs RX8 Injectors?

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12-31-2010, 04:34 PM

#21

Braineack

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Quote:

Originally Posted by falcon

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.

12-31-2010, 05:19 PM

#22

gryffinwings

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Quote:

Originally Posted by miatamike203

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.

12-31-2010, 06:15 PM

#23

miatamike203

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You are lucky lol and your source is right that's what they where meant for.

01-01-2011, 04:29 AM

#24

gryffinwings

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Quote:

Originally Posted by miatamike203

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.

01-01-2011, 10:13 AM

#25

miatamike203

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Nice cant wait to see what you find.

01-01-2011, 12:11 PM

#26

gryffinwings

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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.

01-01-2011, 12:22 PM

#27

Braineack

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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.

01-01-2011, 12:25 PM

#28

Faeflora

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Quote:

Originally Posted by miatamike203

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?

01-01-2011, 12:27 PM

#29

Braineack

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those are the TBs...we can assume the IC plumbing would go to them...

01-01-2011, 12:30 PM

#30

miatamike203

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You are right sir.

01-01-2011, 03:27 PM

#31

Deatschwerks

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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

01-01-2011, 06:00 PM

#32

gryffinwings

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Quote:

Originally Posted by Deatschwerks

Already got a set of 4 - RX8 Yellow Secondary Injectors for myself. Thanks for the info though.

01-03-2011, 06:49 AM

#33

Sandro

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Quote:

Originally Posted by gryffinwings

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

01-03-2011, 01:26 PM

#34

gryffinwings

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Quote:

Originally Posted by Sandro

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?

01-05-2011, 09:32 AM

#35

Sandro

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Quote:

Originally Posted by gryffinwings

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 can´t 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.

01-06-2011, 10:51 AM

#36

gryffinwings

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Quote:

Originally Posted by Sandro

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?