well i finally have some free time to do a write up on my experience of setting up my n2o system to be controlled by k-pro. i could not find any real threads that talk about it so i figured i would make one for people who want to do in the future. b/c i had to do quite a bit of looking around to figure everything out. and i have wanted to do it for quite a while but without information i was kinda slowed down. so here it goes..............
first things first. if you plan on doing this and you have neither k-pro or nitrous i would suggest getting k-pro first. the main reason is that the wiring for nitrous and k-pro, and nitrous w/o k-pro is different. and the fact that you will not have to install as much. if you do k-pro first then you will not have to install a WOT switch, RPM window switch, or fuel pressure saftey switch, if you chose to. there are other reasons also but they are just prsonal prefrences.
the basic setup is very simple. you would just have one n2o solenoid, one relay, and on switch.
the n2o solenoid will have 2 wires comming off of it. it does not matter which one goes where, but one will go to a ground and one to a relay.
the relay will have 4 wires comming out of it. they will be color coded and the book will tell you which wires are for what. you will have one that goes to the ECU. one that goes to the solenoid, and one that goes to a 12V source. the 4 was ment for a FP switch or a gound, but in this case it has to tap into the 12V wire. i just striped a small section of wire that ran to the 12V source and soldered (dp :dontknow: ) the ground wire to it.
the switch is simple as well. i have the NX switch pannel that controls my bottle heater, purge, activation, etc..........but for understand purposes we will use the auto zone APC switch for our switch. it will have a 12V source, a ground and a wire that runs to the ECU.
so you have a wire from the relay to the ECU, and a wire from the switch to the ECU.
now for the fun part. INSTALLING THE 2 WIRES TO THE ECU. if the ECU is installed then you will have 3 wiring harness "blocks", thats what were gonna call them. there is one to the far left (closest to the driver) and 2 to the far right (toward the pass. door) you will only be dealing with the one closest to the driver (the one to the far left). there will be 3 rows of wires that look like this:
............ ........
.....................__
....... ... ........
that is an extreme rough idea.
there are 2 way to make this work.
1) get the ECU pins from hondata, pull the old ones and put the new ones in with the new wires crimped in them. i tried that, didn't work, gave up, and did it this way.......
2) cut the 2 wires that are already in the ECU and solder them to the new wires that will control the nitrous (the one from the relay and the one from the switch). for a temporary fix i crimped them together with wire connecters. but did it the right way about a week later.
WHICH WIRES IN THE ECU TO PULL/CUT. my car is in the shop and im to lazy to look up which wires i did, but as soon as i get it back i will give you 100% sure answer af which ones they are. i am sure that both wires that you will be dealing with are in the middle row of the wire harness block. the one that has the "__" beside it in my BS diagram. you will cut into the wire on the far left and (don't quote me on this) the wire that is 6 spots from the left. if you cut the wire make sure you leave enough to solder, crime, or whatever to your 2 wires coming from the relay and the switch. the rest of the wire that is from the wiring harness, i just left it hanging.
and im pretty sure thats about it. this is a very rough explaination and i will fine tune it when i have some more time.
if you have any questions don't be afraid to ask. and if you think i forgot anything let me know.
:thumbsup: :driving:
first things first. if you plan on doing this and you have neither k-pro or nitrous i would suggest getting k-pro first. the main reason is that the wiring for nitrous and k-pro, and nitrous w/o k-pro is different. and the fact that you will not have to install as much. if you do k-pro first then you will not have to install a WOT switch, RPM window switch, or fuel pressure saftey switch, if you chose to. there are other reasons also but they are just prsonal prefrences.
the basic setup is very simple. you would just have one n2o solenoid, one relay, and on switch.
the n2o solenoid will have 2 wires comming off of it. it does not matter which one goes where, but one will go to a ground and one to a relay.
the relay will have 4 wires comming out of it. they will be color coded and the book will tell you which wires are for what. you will have one that goes to the ECU. one that goes to the solenoid, and one that goes to a 12V source. the 4 was ment for a FP switch or a gound, but in this case it has to tap into the 12V wire. i just striped a small section of wire that ran to the 12V source and soldered (dp :dontknow: ) the ground wire to it.
the switch is simple as well. i have the NX switch pannel that controls my bottle heater, purge, activation, etc..........but for understand purposes we will use the auto zone APC switch for our switch. it will have a 12V source, a ground and a wire that runs to the ECU.
so you have a wire from the relay to the ECU, and a wire from the switch to the ECU.
now for the fun part. INSTALLING THE 2 WIRES TO THE ECU. if the ECU is installed then you will have 3 wiring harness "blocks", thats what were gonna call them. there is one to the far left (closest to the driver) and 2 to the far right (toward the pass. door) you will only be dealing with the one closest to the driver (the one to the far left). there will be 3 rows of wires that look like this:
............ ........
.....................__
....... ... ........
that is an extreme rough idea.
there are 2 way to make this work.
1) get the ECU pins from hondata, pull the old ones and put the new ones in with the new wires crimped in them. i tried that, didn't work, gave up, and did it this way.......
2) cut the 2 wires that are already in the ECU and solder them to the new wires that will control the nitrous (the one from the relay and the one from the switch). for a temporary fix i crimped them together with wire connecters. but did it the right way about a week later.
WHICH WIRES IN THE ECU TO PULL/CUT. my car is in the shop and im to lazy to look up which wires i did, but as soon as i get it back i will give you 100% sure answer af which ones they are. i am sure that both wires that you will be dealing with are in the middle row of the wire harness block. the one that has the "__" beside it in my BS diagram. you will cut into the wire on the far left and (don't quote me on this) the wire that is 6 spots from the left. if you cut the wire make sure you leave enough to solder, crime, or whatever to your 2 wires coming from the relay and the switch. the rest of the wire that is from the wiring harness, i just left it hanging.
and im pretty sure thats about it. this is a very rough explaination and i will fine tune it when i have some more time.
if you have any questions don't be afraid to ask. and if you think i forgot anything let me know.
:thumbsup: :driving: