monzue

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Thank you so much, carbonRX8! This information was a great help to me. I would like to know which injectors that I have, Is there any easy way for me to check the impedance on all the fuel injectors to make sure that they are High Impedance? For example, use an ohm meter on the relay contacts in the fuse box for example? or probe a certain wire on the PCM Connector? What ohm level am I looking for?

monzue

Ok, I might have answered my own question...

If someone could look at the chart below and tell me what fuel injectors I may be running, that would be helpful. I have measured my resistances on my fuel injectors.

I think that I have High impedance Fuel injectors in:
Front Primary 1
Rear Primary 1
Front Primary 2
Rear Primary 2

and I think I have low impedance Injectors in:
Front Secondary
Rear Secondary

Could someone comment on this setup and let me know what fuel injectors I may have, as well as if this setup will work with the Cobb Access port?

Thanks!

PS. Note in the picture below that there is a shot of my relay box. In the Electrical wiring diagram for this car, one wire of the fuel injector was connected to the PCM Wiring harness and the other wire was indicated to be connected to "B+"

bumblebeerx8

iTrader: (7)

can someone confirm that my wiring is on the right injectors on my 04 mt
FP-White Tape(no wiring colors)
RP-Yellow Tape(no wiring colors)
these come off the same harness i could get wire colors if needed just more work
FS-Blue/Red,White/Blue
RS-Blue/Black,White/Blue
FP2-White/Blue,Blue/Black
RP2-White/Blue,White/Green

thanks for any help. i really dont want to take this back back apart

MrVei

nice! i took mine all out to remove the lower mani. any info on plug oder?

TeamRX8

iTrader: (25)

more accurate data for the yellow P2/Secondary injectors:

Flow Rates:

450cc/min at 3 bar

486cc/min at 3.5 bar

524cc/min at 4 bar

Resistance: 11.8-16.5 Ohms

Voltage: 8-15 Volts, Nominal 13.5 Volts

Amperage: 1.0 Amps

Pressure: Min. 36 PSI (2.5 bar), Max. 101 PSI (7 bar)

olddragger

iTrader: (3)

Thats good info.
Anyone have the FP variances between the S!, the S2 and the walbro set ups?

Brettus

iTrader: (2)

You have been talking a lot lately about stuff that kinda implies you are doing a turbo setup . Where is your build thread ?

TeamRX8

iTrader: (25)

I research a lot of different things, doesn't necessarily mean I am building anything in particular, though that could be a plan in another year or two

MazdaManiac

iTrader: (3)

That is significantly different than the data I've collected from three independent testing sources, all of which are well known vendors, including the OE, Denso.

Brettus

iTrader: (2)

/\ FWIW Injector Dynamics gave me the figure of 495cc s @ 390Kpa(OEM fuel pressure) for the yellows and 405cc for the reds.

TeamRX8

iTrader: (25)

they are a bit high compared to my own, but the OE /Denso data is just as far off in the opposite direction IMO as previously eluded to in a prior post

MazdaManiac

iTrader: (3)

I think several factors are at work there since testing methods are actually not standardized.
Different systems utilize different dead times, max duty cycle, nominal voltage and even a different testing solvent.

All that matters to me is what lines up with the scalar values in the software and the OE numbers do that best.

Highway8

iTrader: (11)

According to the parts diagram I got from my local mazda parts department, those part numbers are switched. Should be

Primary (located in houseing) N3R113250
Secondary (located in LIM) N3R213250

ManyRX

iTrader: (5)

Can anybody chime in on running yellows P1's and Blue AT P2's. Im interested in running this set up.

Brettus

iTrader: (2)

This is what i currently run . It does work , but there is some tuning you need to do to combat the hole in transition . Possibly not ideal for your tuner .

MM recommended earlier that yellow p1 , blue sec and yellow p2s would work better . I have not tried it .

MazdaManiac

iTrader: (3)

Uh, whut?

Sec and P2 should be the same injector. That is what I "recommend".

What I "recommend" is series II green injectors in the primary and up-flowed, matched blues in the secondary and P2 positions.

Brettus

iTrader: (2)

OK - it was in another thread a while back . Perhaps i used the term "recommended"
a little loosely .

ManyRX

iTrader: (5)

Ok so green P1's and blue P2's and secondaries...this should be a good set up for BNR upgrade @10psi right? I cant find the green ones online though,gonna have to call the stealership.

Footman

iTrader: (2)

The RX8 is port fuel injected... Are the fuel injectors right before the opening to the combustion chamber?

In otherwords, are the fuel injectors after all of the SDAIS portion of the intake? Meaning if one puts Seafoam/BG44k into the gas tank, none of that stuff even remotely touches any of the SSV/VDI/APV ports?

Highway8

iTrader: (11)

S2 Primary green injectors. Mazda part # N3R213250 You can get them through some of the online discount mazda parts dealers for about $150 each.

dhernandez

im putting a traction control in my rx8 what the best place to get the wire diagram?

wcs

iTrader: (2)

?
And why is this in the Fuel Injector thread
?

MazdaManiac

iTrader: (3)

Wrong part number.

The series-II primaries (green) are N3R1-13-250.
The series II secondaries (purple) are N3R2-13-250.

Highway8

iTrader: (11)

Yes that was my mistake. I think I copy pasted someone else and I didn't correct it.

MazdaManiac

iTrader: (3)

Might have been me or Ash.
Either way, I had to look it up, anyway.

$121 each for people registered with MazdaSpeed MotorSports Development.