Jump to content
SAU Community

Recommended Posts

hey i got a rb20det just got the ecu chiped and with my injectors apparently i have to run a ballast resistor all i know about the injectors is they came in a hks computer and injector pack they are 550cc and say denso on the side the injector impedance is about 2-3 ohms...and if i use them without the resistor it will fry the ecu?

6.8 ohm 15watt ballast resistor sound right?

also have a custom twinfeed fuel rail will the stock fuel pressure regulator be alrite?

rb20det

-fmic

-pod

-bov

-hks adjustable cam gears

-550cc injectors

- twin 10mm lines from tank (stock fuel line is used as a return)

-gtr fuel pump set up externally

-rb25det turbo high flowed with a vl .60 front cover (built to hold 22psi)

-3.5" dump 3" cat back

-q45 afm

-18psi

aim is 350rwhp but am expecting anywhere from 300rwhp up

its a r32 gts-4 should i run it on the dyno is 4wd or rwd?

also what does it have more hp in? ive had it on the dyno completely stock in rwd and get 175.4 rwhp

cheers vance

Edited by OGR88 R32

I think 10 ohm is more on the money. At least 10 Watt as well.

I don't do hp but have seen a 20 run 260rwkw as a stock short engine. It was backed off for a little longevity.

All the Nissans run with 5.5-6ohm resistor packs as do a lot of other cars that I know of. Honda, Mazda etc.

I picked up a R30 Skyline's resistor pack for next to nothing.

I did a few calcs a while back, from memory it turned out I required some where around 17w resistors.

Good 17w 6 ohm resistors are difficult to get at a reasonable price. A total of 6 worked out to nudge close to $100.

Grab an R30 or 280ZX resistor pack from the local wreckers, much cheaper and the resistors are designed for the purpose. :O

The male plug can be purchased from your local autostore for ~$2.95, the less soldering required the better.

I wouldn't be reving or driving the car if your not running a resistor pack, it WILL cause the injector drivers to fry and worse case catch fire. It 'may' be ok on idle and at low rev's but mid to high rpm and your most definitely asking for trouble.

Be safe, just dont drive it until its sorted.

IF you decide to go separate resistors here's what 'should' be used.

http://www.rx7store.net/product_p/injector%20resistor.htm

Remember thats in USD.

Attached below is a pic of my R30 resistor pack. Looks the same as the GTR item just with a different plug.

post-382-1166023087.jpg

yeah they are out of a toyota and ive got the plugs sorted i really need to get it goin by the weekend so il see if i can get my hands on the r30 resistor pack seems like the way to go thanks heaps for all the help everyone especially cubes

cheers vance

As a rule of thumb if you're using a JECS or Denso injector and have to change the plug then the unit is of a different impedance. The best way to check is to use a multimeter and test the resistance.

hey cubes, have you got a pic of what the resistors look like without the cover on top of it?

i brought a resistor packing thinking it had covered and when it turned up i was missing them, so i want to confirm whats happening

GTS25t injectors are 11.5 ohm

Geoff, am I right to guess that RB20DET (R32) injectors are the same resistance as the R33 RB25 ones? and the only difference being the wey they feed into the engine? Ive never sat them side by side...

cheers

-Jez

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I had 3 counts over the last couple of weeks once where i got stranded at a jdm paint yard booking in some work. 2nd time was moving the car into the drive way for the inspection and the 3rd was during the inspection for the co2 leak test. Fix: 1st, car off for a hour and half disconnected battery 10mins 4th try car started 2nd, 5th try started 3rd, countless time starting disconnected battery dude was under the hood listening to the starting sequence fuel pump ect.   
    • This. As for your options - I suggest remote mounting the Nissan sensor further away on a length of steel tube. That tube to have a loop in it to handle vibration, etc etc. You will need to either put a tee and a bleed fitting near the sensor, or crack the fitting at the sensor to bleed it full of oil when you first set it up, otherwise you won't get the line filled. But this is a small problem. Just needs enough access to get it done.
    • The time is always correct. Only the date is wrong. It currently thinks it is January 19. Tomorrow it will say it is January 20. The date and time are ( should be ! ) retrieved from the GPS navigation system.
    • Buy yourself a set of easy outs. See if they will get a good bite in and unthread it.   Very very lucky the whole sender didn't let go while on the track and cost you a motor!
    • Well GTSBoy, prepare yourself further. I did a track day with 1/2 a day prep on Friday, inpromptu. The good news is that I got home, and didn't drive the car into a wall. Everything seemed mostly okay. The car was even a little faster than it was last time. I also got to get some good datalog data too. I also noticed a tiny bit of knock which was (luckily?) recorded. All I know is the knock sensors got recalibrated.... and are notorious for false knock. So I don't know if they are too sensitive, not sensitive enough... or some other third option. But I reduced timing anyway. It wasn't every pull through the session either. Think along the lines of -1 degree of timing for say, three instances while at the top of 4th in a 20 minute all-hot-lap session. Unfortunately at the end of session 2... I noticed a little oil. I borrowed some jack stands and a jack and took a look under there, but as is often the case, messing around with it kinda half cleaned it up, it was not conclusive where it was coming from. I decided to give it another go and see how it was. The amount of oil was maybe one/two small drops. I did another 20 minute session and car went well, and I was just starting to get into it and not be terrified of driving on track. I pulled over and checked in the pits and saw this: This is where I called it, packed up and went home as I live ~20 min from the track with a VERY VERY CLOSE EYE on Oil Pressure on the way home. The volume wasn't much but you never know. I checked it today when I had my own space/tools/time to find out what was going on, wanted to clean it up, run the car and see if any of the fittings from around the oil filter were causing it. I have like.. 5 fittings there, so I suspected one was (hopefully?) the culprit. It became immediately apparent as soon as I looked around more closely. 795d266d-a034-4b8c-89c9-d83860f5d00a.mp4       This is the R34 GTT oil sender connected via an adapter to an oil cooler block I have installed which runs AN lines to my cooler (and back). There's also an oil temp sensor on top.  Just after that video, I attempted to unthread the sensor to see if it's loose/worn and it disintegrated in my hand. So yes. I am glad I noticed that oil because it would appear that complete and utter catastrophic engine failure was about 1 second of engine runtime away. I did try to drill the fitting out, and only succeeded in drilling the middle hole much larger and now there's a... smooth hole in there with what looks like a damn sleeve still incredibly tight in there. Not really sure how to proceed from here. My options: 1) Find someone who can remove the stuck fitting, and use a steel adapter so it won't fatigue? (Female BSPT for the R34 sender to 1/8NPT male - HARD to find). IF it isn't possible to remove - Buy a new block ($320) and have someone tap a new 1/8NPT in the top of it ($????) and hope the steel adapter works better. 2) Buy a new block and give up on the OEM pressure sender for the dash entirely, and use the supplied 1/8 NPT for the oil temp sender. Having the oil pressure read 0 in the dash with the warning lamp will give me a lot of anxiety driving around. I do have the actual GM sensor/sender working, but it needs OBD2 as a gauge. If I'm datalogging I don't actually have a readout of what the gauge is currently displaying. 3) Other? Find a new location for the OEM sender? Though I don't know of anywhere that will work. I also don't know if a steel adapter is actually functionally smart here. It's clearly leveraged itself through vibration of the motor and snapped in half. This doesn't seem like a setup a smart person would replicate given the weight of the OEM sender. Still pretty happy being lucky for once and seeing this at the absolute last moment before bye bye motor in a big way, even if an adapter is apparently 6 weeks+ delivery and I have no way to free the current stuck/potentially destroyed threads in the current oil block.
×
×
  • Create New...