Gtr Injector Resistor Ballast Box

[AntonRx7]

i was gona get one of these and get gtr injectors for my rb20 gtst, do the injector just go straight in? and if i have the resister pack will i also need a tune? so therefore i could not fit the two things and then go get tune as i can't drive it?

[silver gts-t]

bump.....

anyone actually end up installing anything???

[Cubes]

The 5.5-6.8ohm resistors are the ones to use.

10W is fine providing you mount them to a metal box and mount the pack outside of the engine bay (as the origional gtr resistor pack is)

Reason being is when the resistors get hot they don't perform as they should.

So even with the propper GTR resistor pack in a GTST you shouldn't mount it inside the engine bay.

I prefer to use the 15w+ watt resistors encased in a heatsink.

Edited September 17, 2005 by Cubes

[B0oStEr]

So the MR30 dropping resistor will do the same job as the GTR one?

I measured one I had lying around and it was 6.8 ohms.

Doesn't the R32 gtst power fc have 440cc injectors as an option on the injector menu?

Does that mean they anticipate people using GTR injectors as an upgrade?

I can't read my Jap manual so I can't tell what they consider safe impedence.

I'd sure hate to toast those transistors.

[Cubes]

There is no option for selecting injector types.

There is only a trim. Inside the PFC it has stored the stock injector values, you then either do an overall trim or change every cell in the map to achieve the correct afr's.

The issue with an overall trim is you often run out of adjustment via the pfc. From memory 1.4? is the most you can adjust to. If making a lot of power and using a trim this WILL cause problems.

The only propper way to do it is do a complete fuel map tune with no trimming.

[B0oStEr]

OK, so the bit in the manual with injector sizes just shows you how to calculate trims?

eg. 270cc / 440cc =.6136

Will it cope with that until I get a full tune?

So the MR30 dropping restistor (6.8 ohms) will do the the job with the pfc and gtr injectors?

[C_DawG]

The 5.5-6.8ohm resistors are the ones to use.

10W is fine providing you mount them to a metal box and mount the pack outside of the engine bay (as the origional gtr resistor pack is)

Reason being is when the resistors get hot they don't perform as they should.

So even with the propper GTR resistor pack in a GTST you shouldn't mount it inside the engine bay.

I prefer to use the 15w+ watt resistors encased in a heatsink.

<{POST_SNAPBACK}>

A 6.8oHm in series with the ~2oHm of the injector, at 12V will draw 1.36A.

So at 1.36A the 6.8oHm will dissipate 12.577 Watts.

[Cubes]

I've done the calcs and had a read of the resistor specs.

The 10w is ok and the resistors will handle it, I believe there's another bloke on SAU running 10w and a few over at SDU, you wouldn't want them getting hot, though. I wouldn't do it.

The injectors see a little more than 12v. More like 13.8v, I use the 25w Aluminium Housed Resistors to be on the safe side.

Edited September 22, 2005 by Cubes

[heller44]

Also remember that you aren't running at 100% duty either , so the current flow will be at a reduced ratio following along with the duty cycle of the injector. (unless you are right on the edge..)

Better to be safe than sorry though.

[Josh]

So the resistors out of the MR30 (L24?) Will work? AM curious about this as I have an R30 on my lawn at home, just sitting there rusting.. It has the right resistance?

[Waldo]

I wired in 10watt, 10 ohm resistors in series with each injector, they are all taped up along the fuel rail, they have been working fine for the past 2 weeks, mine dont see much heat because where they sit the fan blows air straight down the fuel rail, im yet to measure their temps though with the infra thermometer.

[Cubes]

Why you must run a resistor pack.

http://www.hondata.com/techlowohminjectors.html

Those looking for the R30 resistor pack; its located behind the strut on the passenger side. Very easy to see. Be sure you grab the complete plug (male and female) with some wire to spare.

Edited December 3, 2008 by Cubes

[Josh]

Hmm, I shall check mine out tonight when I get home..

[Cubes]

Got a multimeter?

I changed the pics in my prior post.

Edited September 27, 2005 by Cubes

[Josh]

Nah, Don't have any new injectors either, just handy to have if I'm gunna do this in the future - soon.. I really should invest in a multimeter too.

[YO880]

Joel,

so you still have a copy of the wiring diagram? the link is dead

[Drifterdan]

Ok so the final verdict seems that thr r30 resistor pack will work? Thats fantastic, until the supply and demand sends prices up like what happened with the gtr packs

[Cubes]

lol.. Dig up a 1yr old thread.

Yes the R30 resistor pack works. I've been running it since the beginning of this year.

[huddy]

while were at the old thread, what damage is caused if gtr resistor pack gets too hot?

thanks

[CEF11E]

digging up old threads again

I have just installed GTR injectors and used 10watt resistors from farnell. they are 6.8ohm and are wire wound with heatsinks. I picked them because they are rated to 275deg c. the part number is 950-8015

find them here:

CLICKY CLICKY

they cost about $28 for 6

Edited November 14, 2006 by CEF11E