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Wiring For Top Feed Inj And Resistor On Rb25det

stricnynel0s

By stricnynel0s,
in Engines & Forced Induction

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stricnynel0s

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Hey guys, i am redoing my entire wiring harness and i ran into a small problem. Here goes, i have a series 2 rb25det engine harness, and i changing to top feed injectors and low impedence ( i am using a gtr resistor) well first problem is with my changing to top feed i have to change the plugs. On the sidefeed its clearly obvious which one is power and which one is ground. One is thicker and gray thats the same on all inj (ground) and the other has a single silver dot and is thinner (power) (I assume!!) now for the top feed plugs (which were cut from a rb26 harness) the two wires look to be same gauge, so i am not sure which one is power and which one is ground, and on top of that they all have differant colors, the only identifying mark is one has a single silver dot and the other has two silver dots, i assume liek the side feed rb25 the single dot is power ? or maybe if i had a way to orientate the rb26 plug i could know like if plug is facing me the right one is power and the other one is ground. Now i am at my second problem.... I am also wiringing a resistor in. http://www.skylinesaustralia.com/forums/Gt...s+1+to+series+2 this website shows how to do it, and i noticed something just now... that he cut the single dot wire and that that goes to the resistor, so i kinda answered my own question but i will take any input. now back to my question. i know from the resistor there are 7 wires, 1 12v power and the rest are pwr to injector, does it matter which wire from resistor goes to any injector it does it not matter, since stock ecu is sequential firing i would think it matters but idk... i just found out they are not cyclinder specific on the resistor, so thats good. but i am back to main question of changing plugs. ( i did not delete the updates i got when i made this post because it might be helpful to someone reading this in future)

i can take pics if anyone needs clarity

stricnynel0s Collaborator

stricnynel0s

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bump any thing guys i cant finish my wiring without finding out how people did top feed on their rb25 and resistor, i have an idea but i cant risk my ecu / inj

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