GTR injectors into RB20 - Question

[R31 POWER]

Good to hear Chris,Roys a top bloke and he helped me out heaps

Where the power wire branches out it's right under the throttle body.

I will also put up my maps maybe even tonight or on the weekend.

One thing I learnt yesterday is check your plenum bolts coz I had one missing and god knows for how long.I put another bolt in and now it spools up so quick like 500rpm quick.I would get 11psi at 4000rpm in second before and now get 11psi at 3500rpm,so much better to drive.

[Chris32]

Well, on saturday morning ( I had a few hours to kill before going to a wedding LOL!) I had a look at my spare motor to see if I could locate the power wire going to the injectors

As it was a spare, it was all done for a bit of practice, next weekend hopefully I can get it all done

Took me about half a hour to get everything off and I found the wire no probs. On mine I traced it from the injectors back up the loom, and it branced off into four, with one wire going down and branching of to three to feed the foward 3 injectors

I tested my resistor pack, and it measured 6 ohms on each wire, so looks to be good.

How did you guys get the plugs of the injectors? Being a spare motor I tried a few things and the only way I could get them of was by pulling that retaing spring wire thing off but I kept on breaking the little plastic bits off that held that spring in place!! Hopefully there is a better way than what I was doing!

All seemed pretty straight forward though, to get the fuel rail out I had to pull the back two injectors out of the rail, as they would foul on a hose going to the plenum

Another thing, after taking the throttle body and the AAC valve assembly off the gaskets where buggerd, chances are it will happen when I do it to the motor in the car it will tear them too, can I use gasket paper and make some replacemnets up or are gaskets available from Nissan as a spare part?

Other than that, all seems to be not to hard at all

How do my maps I have compare to everyone elses?

Chris

[Bl4cK32]

i used a pair of needle nose pliers to remove the injector plug clips...they came off with no hassles...

I replaced my throttle body gasket and aac valve gasket on mine (i had every gasket replaced on my new motor etc.) as every one of em is at least 12 years old....go the Nissan genuine 'cos their cheap, and not worth replacing later if they leak

[Chris32]

Ok no probs, I will use some decent pliers, and chase up a few gaskets. Which Nissan dealer did you get your gaskets from?

Chris

[Bl4cK32]

Craig from Unley nissan

[Roy]

Sorry, worked Saturday, and slept most of Sunady after the drive back to Vic. Ill have a look at the Maps later this week and post up before sat morning, though my map will only be good for up to 2500rpm then our turbo characteristics are likely to be very different

[Chris32]

No probs mate, I have ordered my gaskets for the throttle body and AAC valve, they should be in today

I have a feeling that my map is for bigger injectors but I will wait to do a quick comparison first. If you guys don't want to post them up you can PM them to me if you want

When I get my car tuned I will post up the final map for comparison's sake. I punched in all the numbers into a Excel spreadsheet BOOSTD made up, it all looks to be pretty good, with no big holes or dips in the fuel map

Is there a option in the PowerFC to adjust the injector scaling? What I was thinking is if the tune is no good in my car to get me around for a few days before I get it tuned, I could always load the standard map and reduce the overall fuel map by 63% (280 v 440cc injectors, please correct me if I am wrong??) and it should be drivable at least, allthough it wouldn't be seeing any sort of boost before it hits the dyno!!

Chris

[nedb]

Roy, are you running the RB26 injectors on the stadard ECU or did you have it re-mapped?

[Chris32]

Roy has a PowerFC

Got all my gaskets and crap just then, so looks like this weekend I should get it all done. Also picked up a boost control kit for the PFC as well

Just need to find out if my maps are suitable now or if they are no good, if not I will do as I said in my previous post and default the PFC and use the injector scaling function to drop back the amount of fuel, either way it should work............

Chris

[nedb]

Ah ok, thanx. I just read the whole post and there was a post from him from Feb saying he's using rb20 ECU. Must've upgraded since then. Would RB26 injectors work on the RB20 ECU or does it need to be re-mapped?

[Chris32]

Ah ok, thanx. I just read the whole post and there was a post from him from Feb saying he's using rb20 ECU. Must've upgraded since then. Would RB26 injectors work on the RB20 ECU or does it need to be re-mapped?

It would need to be re-mapped, as they are a much larger flowing injector

[Chris32]

Here is my fuel and ignition map - got bored at work this arvo :headspin:

[yogi000]

Hey Chris,

this might be a stupid question, what does the pfc value represent, is it load?? or am i confused???

Also on the fuel map, is 136 the largest number u can go (most amount of flow?). This would have to be changed when larger injectors are fitted or is that where injector correction comes into it?

I'm trying to understand how these things work.

Cheers

[Chris32]

Hey Chris,  

this might be a stupid question, what does the pfc value represent, is it load?? or am i confused???

Also on the fuel map, is 136 the largest number u can go (most amount of flow?). This would have to be changed when larger injectors are fitted or is that where injector correction comes into it?  

I'm trying to understand how these things work.

Cheers

As far as I can work out - the PFC Value part is refering to the location of the point of the map, from 1-20, so I am pretty sure its load. I didn't come up with the chart, so I cannot be sure, I just punched in my numbers I had copied of my PFC

136 isn't the biggest number you can go, but I am not sure what it goes up to as I haven't played around with it much. The map that was in there before mine was from BOOSTD's R33, which was running standard injectors and had numbers well over 1000 entered in, but I will add that the fuel map looks pretty average to me, but I am no expert

I am trying to find a english manual so I can work out all the functions in the hand controller

Chris

Chris

[Ed G]

Looking forward to seeing this result... just went and got me a set of gtr injectors

[Chris32]

Looking forward to seeing this result... just went and got me a set of gtr injectors

I am going to be taking alot of pictures so in the future if someone wants to do the same it will be pretty straight forward

Don't forget to get the resistor pack!

Chris

[nedb]

Ed G - How much did you pay for the injectors? Did you get the resistor with it?

[yogi000]

so is it right to say that your tune is more for response compared to boostd which was more for top end???? This is what i'm gathering from comparing the two or its not a fair comparison (rb20 vs rb25)????

This is pretty interesting!!

[Chris32]

so is it right to say that your tune is more for response compared to boostd which was more for top end???? This is what i'm gathering from comparing the two or its not a fair comparison (rb20 vs rb25)????

This is pretty interesting!!

I have no idea whats mines tuned for, I plugged it in, it started, I turned it off.

I copied the maps from it and that was it, my car is currently running on the stock (chipped) ecu

It will be interesting to compare it with what Roy and R31POWER's maps are like, especially the differant fuel maps

Chris

[Roy]

I canmt wait to finally get my car sorted, and even more curious to compare the Pfc tune to the rewritten Jap ecu i have. I havent ruled out going back to the jap ecu as seat of the pants tells me its better then my current Pfc tune:(