Injector resistence

[LEMHEAD16]

Do I need to a resistor on 370cc injectors from a CA18t when I install them on my KA24 E?

[wild_maxx]

i believe they are high impedence but you can easly check with a multimeter. i just used some 88 mazda rx-7 460cc high impedence injectors. they fit nice and tight in the fuel rail.

[LEMHEAD16]

what is considered "high" impedence and what is "low" if I check them, and what are stockers.

[:: orion ::]

High is ~11 (or so) ohms...stockers should be 11-12 ohms.

- Brian

[hannibal]

CA injectors are low impedence.CA18DET and RB26 = low

KA-E, KA-DE, RB20/25, SR20, VG30DETT are all high impedence...

[Toahk]

CA injectors are low impedence.CA18DET and RB26 = low

KA-E, KA-DE, RB20/25, SR20, VG30DETT are all high impedence...

uhh wrong. I dont know about the others, but ka-de, sr20 etc are all low.

[LEMHEAD16]

I will check both my CA18det and KA e injectors tonight

[hannibal]

Thats the info I came up with from searching the net.

I wouldnt bet my life on its accuracy, but I wouldnt post unless its something I believe to be true. Check your sources. The only low impedence injectors Ive heard of are the CA and RB26 top feeds...

[240SicknessX]

i also know that the z32 370s fit the ka24de, so they must be low impeadance also

*edit* - i checked the fsm, 96 ka24de injectors are suppost to have 10-14 ohms of resistance. They are not low impeadance.


Modified by 240SicknessX at 9:48 AM 3/29/2005

[wild_maxx]

buy these and send them in to get cleaned and flow tested.

http://cgi.ebay.com/ebaymotors...33554

[LEMHEAD16]

Okay I checked the injectors.

Stock KA24E 2.7 ohms

CA18DET 14.1 OHMS

So my next question is do I just need to put a resistor, diode, anything in line?

Thanks

I must have been sniffing the gas

Stock KA24E 14.1 ohms

CA18DET 2.7 ohms
Modified by LEMHEAD16 at 7:16 PM 3/28/2005

[wild_maxx]

i think thats wrong. the stock kae injectors are high impedence. correct me if i am wrong but i have never heard of low inpedence kae injectors.

[:: orion ::]

IGNORE ALL THE "I THINK" COMMENTS AT THE TOP OF THE THREAD.

KA 270cc injectors are HIGH IMPEDENCE.

SR 370cc injectors are HIGH IMPEDENCE.

...

"Lem" - remeasure your KA-E injectors...they should be high impedence.

- Brian

[wild_maxx]

I THINK I THINK I THINK I THINK I THINK I THINK I THINK I THINK

HOWS THAT?

[LEMHEAD16]

Okay I checked the injectors.

Stock KA24E 2.7 ohms

CA18DET 14.1 OHMS

So my next question is do I just need to put a resistor, diode, anything in line?

Thanks

I must have been sniffing the gas

Stock KA24E 14.1 ohms

CA18DET 2.7 ohms

Modified by LEMHEAD16 at 7:16 PM 3/28/2005

14.1 is high right and 2.7 is low

Should I just put a 11 ohm resistor in line with the power or with the ground?

[hannibal]

Thanks Orion. Next time I'll write it in caps...

[Toahk]

IGNORE ALL THE "I THINK" COMMENTS AT THE TOP OF THE THREAD.

KA 270cc injectors are HIGH IMPEDENCE.

SR 370cc injectors are HIGH IMPEDENCE.

...

"Lem" - remeasure your KA-E injectors...they should be high impedence.

- Brian

SR high impedance? I think not.

[hannibal]

Just read today that GTiR SR20's use top feed low impedence injectors. I think theyre 440cc...

Lem, I really dont know how to wire in the resistors. I assume they would go on the 12v side.

[240SicknessX]

KA 270cc injectors are HIGH IMPEDENCE.

SR 370cc injectors are HIGH IMPEDENCE.

- Brian

1996 240sx ka24de, injector resistance per FSM page EC-298, is suppost to be 10-14 ohms at 77 degrees farenheight. This puts the de injectors in the high impeadance bracket

low impeadance injectors measure 1.7-3.0 ohms, high injectors measure 10-16 ohms.

[:: orion ::]

SR high impedance? I think not.

Please get your facts straight before posting that as fact...I'm not tryig to be an A55, just trying to keep the info reliable and correct.

It's common knowledge that you can drop SR injectors into a KA rail and use an S-AFC to tune...no resistors needed.

If they were low impedence and you used them on a stock ECU with an AFC...it would kill the injector drivers and the car would not run. That does not happen.

As I posted above...they ARE both high impedence, I'm 100% sure...I'd bet my life on it.

- Brian

[LEMHEAD16]

My original question had nothing to do with SR or DE injectors. Here are the facts.

Ca18det injectors 2.7 ohmsKA24E injectors 14.1 ohms

Does anyone know how I would wire the resistors and what resistance to use?

Thanks- Josh

[:: orion ::]

Yeah, sorry that got off topic a little...

Anyway, a common solution is to pull a resistor block off old Preludes (IIRC)...search the web for it, you'll find how-to's and such.

- Brian

[LEMHEAD16]

thanks brian

[LEMHEAD16]

Here is what a search came up withhttp://www.acceleronics.com/versafueler.htm

For 395 dollrs I could get a new set of bigger high Z injectors. Iguess I should have researched this before buying injectors, but I swear I read a post about CA injectors working on the E.

[WDRacing]

Thanks for the corrections Bri.

I posted my injector spread sheet and its now a sticky. In case anymore situations arrise like this one.

[LEMHEAD16]

that is a great sheet WD

[LEMHEAD16]

anyone?

[preston240sx]

Here's my list of Injectors:Top Feed Engine Style Size Impedance* Years / ModelsNissan KA24E Top feed 260cc High S13Nissan CA18DET Top feed 370cc Low S13Nissan RB20DET Top feed 270cc High R32Nissan RB26DETT Top feed 440cc Low R32/R33/R34

Mazda FC NA Top feed 460cc Low 86-87Mazda FC NA Top feed 460cc High 88Mazda FC NA Top feed 460cc High 89-91Mazda FC turbo Top feed 550cc Low 86-87Mazda FC turbo Top feed 550cc High 88Mazda FC turbo Top feed 550cc High 89-91Mazda FC NA Top feed 680cc Low 84-85

DSM 3000GT/Stealth turbo Top feed 360cc Low 91+DSM Talon/Eclipse nonturbo Top feed 390cc Low 89-94DSM Talon/Eclipse 1G Top feed 450cc Low 89-94DSM Talon/Eclipse 2G Top feed 450cc Low 95-99Mitsubishi Evo Top feed 510cc Low Evo 1-Evo 3Mitsubishi Evo Top feed 560cc Low Evo 4+

Subaru WRX Top feed 420cc 02+Subaru JDM STi Top feed 550cc (565cc?) 99+??

Toyota 3S-GE Top feed 295cc High Toyota 7M-GE Top feed 295cc High Cressida, Supra mk3 NAToyota 2JZ-GE Top feed 315cc High Supra mk4 NA, SC/GS/IS300Toyota 3S-GE Top feed 315cc High Toyota 7M-GE Top feed 315cc High Cressida, Supra mk3 NA

Side Feed Engine Style Size Impedance* Years / ModelsNissan KA24DE Side feed 260cc High S13/S14Nissan SR20DET Side feed 370cc High S13/S14Nissan SR20DET Side feed 480cc High S15Nissan RB25DET Side feed 370cc High R33/R34Nissan VG30DETT Side feed 370cc High Z32

Mazda FD Side feed 550cc High 93-98Mazda FD Side feed 850cc High 93-98Mazda 20B Side feed 550cc High JDM Mazda Cosmo?

Subaru JDM STi Side feed 550cc (565cc?) High pre 99Subaru STi Side feed 565cc High 03+

Toyota 7M-GTE Side feed 430cc (440cc?) Low Supra mk3 turboToyota 2JZ-GTE Side feed 550cc Low Supra mk4 turboToyota 3S-GTE Side feed 430cc (440cc?) Low MR2, 91+Toyota 4A-GZE Side feed? 365cc Low MR2, MK1Toyota Celica GTS Side feed? 310cc High 2000+Toyota JDM 1JZ-GTE Side feed 430cc Low Chaser, Supra mk3?Toyota JDM 2JZ-GTE Side feed 430cc High?* Supra mk4 turboToyota JDM 7M-GTE Side feed 430cc Low Supra mk3 turbo

Ford Turbo Coupe ?? 30lb (~315cc) Low 86-89Ford Turbo Coupe ?? 35lb (~365cc) Low ??Honda Prelude (H22A) ?? 345cc Low 92-96 VTEC

*ImpedenceSaturated = High ImpedencePeak and Hold = Low Impedence

use the chart....jeesh

[preston240sx]

oh yeah thats WD's chart

[santi]

It's common knowledge that you can drop SR injectors into a KA rail and use an S-AFC to tune...no resistors needed.

As I posted above...they ARE both high impedence, I'm 100% sure...I'd bet my life on it.

- Brian

THANK YOU BRIAN!! thats the only piece of info i was lookin for in this thread