GTR injectors into RB20 - Question

[Roy]

So what ill need to do would be to change the Gtst resistor pack to the GTR one? or is dont gtst have a resistor pack as such?

thanks Roy much apreciatted!

Get your hands on an RB20DET wiring diagram, you will find that the wiring diagram for the R32 RB20DET and RB26DETT are on the same diagram (well they are on mine) which helps spot the differences.

The RB20DET does not have a resistor pack, the GTR does. Essentially you need to cut into the power wire that feeds all the injetors, off the firewall it runs on top of the fuel rail branching off where there are injectors. So before it branches off to feed a voltage to any injectors you need to cut it and solder it to the 7th wire on the resistor pack. Then from the resistor pack you have 6 wires that then run to the +ve spade on the injectors. So essentailly you are wiring the resistor pack in series before the injectors, just as std on a GTR.

I should have taken photos... :Oops:

[jnr32r]

do you know if with the power fc can you can change to different resistance? i had a look but doesnt look like it....

[Sydneykid]

Hi jnr32r, Power FC requires the standard impedance injectors, which on an R32 GTST RB20DET are 12-14 ohms (generally called high impedance). R32 GTR RB26DETT have low impedance injectors, around 3-5 ohms. If you use low impedance injectors then the PFC will get too much current drain and overheat.

Hope that helps

[93RPS13]

I am using 13B non turbo injectors which are either 420cc or 460cc Lol damn memory! Anyway I got them from a fella from nissansilvia.com for $35 each. They fit straight in, the last 4 digits are 1350 from memory??? Anyway I also, during the conversion got new injector plugs, which are similar to the stock ones except the lug is in the centre and not offset. They also have the spring you push down to unplug them vs the spring clip that gets flicked off and lost. I am running a microtech LTX12 (a 180sx RB20DET) and haven't got the car back yet so I cannot comment on the further.

do you happen to have pics of the mod'd clip to fit the 13b injectors? Thanks

[omp]

13b non turbo injectors are the square type not the oval shape, which I think you are thinking about.....I think

[93RPS13]

ii think the sqaure type, im not sure but if you can get pics that would be great

[BU5TER]

Sk I'm pretty sure Merli was using a power fc on his gtsts that was using GTR inj with the GTR resistor pack

[Roy]

Im not using a Power Fc but am using the GTR injectors & resistor pack on RB20 ECU.

So std RB20 ECU requires high impedence injectors to limit the current to the ecu...so can use:

- high impedence injectors and standard ECU OR

- low impedence with resistor pack, and std ECU. As impedence of (low impedence injector + resistor pack) equated to using high impedence injectors, the ECU doesnt know any better.

[jnr32r]

Hi jnr32r, Power FC requires the standard impedance injectors, which on an R32 GTST RB20DET are 12-14 ohms (generally called high impedance).  R32 GTR RB26DETT have low impedance injectors, around 3-5 ohms.  If you use low impedance injectors then the PFC will get too much current drain and overheat.

Hope that helps

Will that still happen even if you have a resistor pack, from RB26?

[DoughBoy]

I've got a PowerFC on my ECR33, using std. GTR injectors and a resistor pack. Works fine, computer doesn't know the diff >

[Chris32]

well, injectors are on way

Once I have got hold of the management side of things, they will be going in and then I guess we'll see how they work

Chris

[R31 POWER]

Hi jnr32r, Power FC requires the standard impedance injectors, which on an R32 GTST RB20DET are 12-14 ohms (generally called high impedance).  R32 GTR RB26DETT have low impedance injectors, around 3-5 ohms.  If you use low impedance injectors then the PFC will get too much current drain and overheat.

Hope that helps

I hope this is'nt true because I have a PFC and GTR injectors/resisters are going in this weekend

[GTRgeoff]

Doughboy how did you have to modify the fuel rail for the fitment of the injectors?

[Roy]

Runs an R32 fuel rail....but he has a greddy plenum so may have to check if its still a bolt on for the std RB25 inlet manifold. Between all my RB20s i may have a spare rail we can try

[GTRgeoff]

Thanks Champ. Don't kill yourself getting the work finished this weekend. I'm currently looking around for some injectors so i can be safe running higher boost => more power on the straights at PI and Sandown

[drifto]

That was a handy thread guys, cheers!

Just bought a set of GTR injectors for my RB20 of the Forum.

Didn't realise it wasn't just a bolt in and retune the AFC! Doh!

[R31 POWER]

I just found out that GTR inj and resistor pack works with A'pexi FC.

[Chris32]

good stuff, I have everything now, PFC, injectors and resistor pack

How hard was it to wire in? some pics would be HUGELY appreiceated!!!

Chris

[Roy]

R31 POWER, she fire up ok? Hope it all went well.

[R31 POWER]

I have'nt put them in yet coz I was finding out if they would work with the PFC.After reading SK post it put me off trying it coz I did'nt want to do damage to the ECU.

Roy you'll be the first to know how it goes after I finish that beer.

Chris32 I'll take pics as I go.Hopefully this weekend I'll do it all.