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GTR injector upgrade??

Skorj

By Skorj,
in Engines & Forced Induction

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Skorj Enthusiast

Skorj

Posted
Posted

i have heard that a cheap and effective upgrade for the RB26 440cc injectors is a set of RX7 series IV 550cc injectors that fit striaght into the fuel rail..

there is a guy selling a set of 550cc injectors that are off a 13B turbo.. but he isnt sure what series they are from? without knowing what series, would it still be safe to assume that they would be suitable for use on an RB26 or not??

i think he said they were used on a VL turbo for a while if this helps?

thanks for any info.. :D

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BHDave Grand Master

BHDave

Posted
Posted

If they have a brown top they will be low impedence and suitable for drop in replacement.

If they have a pink/purple top they will be high impedence and will still work but you will need to remove the factory dropping resistor pack from the loom.

I cant remember part numbers off the top of my head but it really does come down to the colour of the plug as there are series 4 high imp injectors out there with low imp part numbers (i have a set) the difference is the plug colour.

Skorj Enthusiast

Skorj

Posted
  • Author
Posted

cheers thanks for the info.. i think they have a brown top so looks all good, if they did happen to be high impedence tho is it a big job to remove the factory dropping resistot pack from the loom?? and after doing so would they then work exactly like low impedence injectors?? thanks agn..

Skorj Enthusiast

Skorj

Posted
  • Author
Posted

they actually have purple top.... do u think its would be worth the effort to make them compatible? they are quite cheap.. or should i just save the time and effort it and look for some low impedence injectors?? is it an expensive/ inefficient process or simple??

cheers

BHDave Grand Master

BHDave

Posted
Posted

Simple, all you are doing is chopping the wires either side of the resistor and connecting them back up.

You may need to modify the injector plug to fit the GTR plugs as the rx7 injector has an offset locating pin. All you need to do is file it flat.

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

Have heard people report these injectors failing in piston engines costing them there whole engine.

IMHO if your going to get injectors then get a set of SARD or Nismo or HKS or whatever bolts in. get 700cc - much better to run less then 70% inj duty with room for improvement.

BHDave Grand Master

BHDave

Posted
Posted

I've run them for 6 months in an rb20 with no problems, it all come down to tuning. What i did notice was at idle and low revs on high vacuum i needed to add a bit of extra fuel for the car to run smoothly, otherwise no problems.

They are all single pintle top feeds after all. If we were talking rb25's it'd be a different story

The main thing is that they are cleaned and flow tested before installation.

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