RB----->A/C

[Darius]

OK cool. So you just run power from the A/C relay to your triple pressure switch, then ground the other side of the switch right? And you didn't do anything with the other two wires on the switch? Did you wire up the IACV and ambient temperature switch?

[RB20DETodd]

OK cool. So you just run power from the A/C relay to your triple pressure switch, then ground the other side of the switch right? And you didn't do anything with the other two wires on the switch? Did you wire up the IACV and ambient temperature switch?

for some reason i was not getting power to my old a/c plug, damnit so i did it this way, it totaly bypasses the factory stuff exept the pressure switch i used that for a saftey. check if you have power at your old a/c plug with the a/c "on" then use that for power then you pretty much are useing the factory stuff exept for the pressure switch on the compressor, the ****ty thing with mine is that it is either off or on, you cant adjust it with the thermostat on the climate control, but oh well.

[monkeyofdrift]

It's called a window , who needs AC.

Pros: Keeps you warm and cool.helps defrost windows windows.helps drys your girlfriends nails.

Cons: Extra lbs. added to your car.Eats up Gas!!!!!!! Makes good used of Windows.Don't need freon.

the onlything I can say about not have AC is, saving $$$.

[RB20DETodd]

It's called a window , who needs AC.

Pros: Keeps you warm and cool.helps defrost windows windows.helps drys your girlfriends nails.

Cons: Extra lbs. added to your car.Eats up Gas!!!!!!! Makes good used of Windows.Don't need freon.

the onlything I can say about not have AC is, saving $$$.

You must live in Canada..lucky.

[chockrl]

I have a RB20 installed in my S13, and with a KA24E a/c compressor you do not need any special brackets. Un-bolt the RB compressor and put the KA compressor in it's place. The only line that doesn't work is the one going back to the firewall around the turbo.

[Bluefire]

Ok just fyi for anyone wondering about the lines. All you need to do is have both sets of lines (ka and rb) that come off the compressor. Then you just measure and cut the ends off. So the RB ends go onto the stock ka lines. Once everything looks like it will line up, take the lines to someone who can weld the new ends on. (aluminum welder)

NOW FOR WIRING (VERY SIMPLE!!!!)

Basically when you hit the a/c button, it sends a signal to the ecu A/C input. Then the ecu sends a signal out (ground) to the A/C relay to click it on. Then the A/C relay sends power to the A/C compressor and to the FICD solenoid turning them both on. The FICD solenoid helps adjust the idle when the a/c is on.

So for wiring...

Chassis Harness Side -------- Engine Harness Side

1. A/C switch(thermo control amp) ---------> ECU A/C input2. A/C relay ground <--------- ECU A/C output3. A/C relay Power ----------> FICD Solenoid

Just use the RB wiring diagram and KA fsm to find the wire colors and position. I don't remember them off the top of my head. Besides s13's and different year s14's use different wire colors and positions so it varies

Also make sure you use the chassis plug for the a/c compressor. Also to test to make sure your wiring is correct without having your lines made or filled, all you have to do is jumper the dual pressure switch. If the lines have too much or too little pressure, the switch will open and the compressor will not turn on.

There you go folks, get those a/c systems running

-Bluefire

[RB20DETodd]

I have a RB20 installed in my S13, and with a KA24E a/c compressor you do not need any special brackets. Un-bolt the RB compressor and put the KA compressor in it's place. The only line that doesn't work is the one going back to the firewall around the turbo.

, damn i wish i could do my swap all over again. This is probobly the best A/C thread so far.

[Darius]

It is proven once again that Bluefire and RB20DETodd are good ****. Now if someone would please conquer the cruise control I would be set.

[ISUJinX]

You and I should do that :-D

[FRaCTioNaL]

Definitely some very useful information here. I will have to bookmark it for future reference and hope to do the swap ASAP.

[27RB240]

I have a RB20 installed in my S13, and with a KA24E a/c compressor you do not need any special brackets. Un-bolt the RB compressor and put the KA compressor in it's place. The only line that doesn't work is the one going back to the firewall around the turbo.

So for that setup you only need one custom line...mhmm....

, damn i wish i could do my swap all over again. This is probobly the best A/C thread so far.

I agree....Bluefire, when you cover the wiring, does that mean everything will work as for using the knobs and such..Also, does that handle the so called pressure switch issue? Its good that this info covers both sides, Using the KA compressor and the RB compressor, I think this should be added to the sticky!

[jrb92se]

ive got an rb25 the ac comp is still on it just no lines or belt is it possible to use this compressor, or do you need on from a ka? what about the s13 drier and condensor are they compatable or should i get s14 stuff? can i just get some ac lines made and wire it up?

[RB20DETodd]

ive got an rb25 the ac comp is still on it just no lines or belt is it possible to use this compressor, or do you need on from a ka? what about the s13 drier and condensor are they compatable or should i get s14 stuff? can i just get some ac lines made and wire it up?

make custom lines, but kind of a risk since these motors we have sat for god knows how long with cut open a/c lines, compressor might be toast, id just look into fabing up a bracket for your ka compressor if you have it.

[jrb92se]

yeah the compressor i have is prolly toast, im gonna try and get s14 stuff from powerline and try and get the ac up and running!! but what about heat? the heater core lines are still there on the fire wall cant i just route the heater hoses from the rb into the core for the s13??

[RB20DETodd]

yeah the compressor i have is prolly toast, im gonna try and get s14 stuff from powerline and try and get the ac up and running!! but what about heat? the heater core lines are still there on the fire wall cant i just route the heater hoses from the rb into the core for the s13??

HEAT IS EASY LOL, i have badass heat that ive used once in 3 years , your autoparts store has plastic elbows and hoses that what i used.

[kouki-gymkhana]

DO NOT USE THOSE PLASTIC ELBOWS FROM THE AUTOPARTS CHAIN!!!! I initially used them to route my heater hoses to the heater core and the plastic elbow burst on the highway doing 75mph and all of the coolant was gone in literally 30 secs. This is what ultimately led to my blown headgasket and the nightmare that has ensued ever since. I am now using metal elbows from home depot that I modified slightly to fit.

As for the A/C issue, I have an OEM-quality/works correctly/no jerry-rigged bull****/watch out for my compressor because it might assplode setup. As for the specifics, I unfortunately cannot say because my wiring guy did all of it when he did the rest of the engine wiring. I can say, however, that I am using an RB26 compressor with a custom A/C line running back over the turbo and across the firewall, KA receiver/dryer and pressure switches. I don't think my wiring guy put any additional pressure switches in the system and the compressor cycles on and off just fine and the idle rises as it should when it kicks on.

It gets hot down in FL, boys, and I would NEVER swap in a motor if I couldn't have A/C too!!

[RB20DETodd]

DO NOT USE THOSE PLASTIC ELBOWS FROM THE AUTOPARTS CHAIN!!!! I initially used them to route my heater hoses to the heater core and the plastic elbow burst on the highway doing 75mph and all of the coolant was gone in literally 30 secs. This is what ultimately led to my blown headgasket and the nightmare that has ensued ever since. I am now using metal elbows from home depot that I modified slightly to fit.

3 Years and no problems here, how tight did you get the hose clamps

[kouki-gymkhana]

It wasn't a question of overtightening the hose clamps because the plastic elbow actually burst in the angle of the elbow, not at the ends due to compression of the plastic. When I changed the broken one, I also removed the other one I had installed and the plastic had gotten so brittle that it was only a matter of time before it gave up the ghost as well.

Good to hear that you haven't had any problems yet because I wouldn't wish what happened to me upon anyone.

[HxC_Nismo]

if i custom build or buy a custom ka a/c bracket for the rb26 what do i have to do on the wiring since the a/c harness isn't part of the main engine harness. cause my rb a/c comp. has 3 wires coming off of it and my ka only has 1 wire and the a/c harness is still in my car. and i already know that the a/c lines have to be modified for leangth and clearance. i just need to know what pin and wire color of the rb26 ecu i have to tap into or if any.

[4door5g]

kouki-gymkhana im also in FL and need some one to hook up the wiring part of my AC, would like to know who your wiring guy is.

[johnny butt]

custom lines is pretty much the hardest part, but i think the best way would be to make a bracket for a the ka compressor to mount on the rb.

You need custom lines made but keep in mind the threads on the bolts that will mount up are not American-spec, so you will end up running into leaks if you don't let the people making the lines know.

Custom lines here ran me ~47$ after my friend found some parts in a junkyard from an Altima.

[Darius]

I'm still pushing to get the hose ends sourced for a kit. The guys I'm working with are having a hard time matching the OEM compressor fittings.

[4door5g]

well i got a whole KA set up except condesor, i also have the RB 20 compresor. what would be my best bet to use? can i just get the bracket to make the KA compresor work? also if i get the bracket do i still need the lines?
Modified by 4door5g at 10:41 AM 10/23/2008

[kouki-gymkhana]

kouki-gymkhana im also in FL and need some one to hook up the wiring part of my AC, would like to know who your wiring guy is.

The guy I used is named Jimmy at Bumblebee Tuning. They are in Oakland Park. I'm not sure if he's still there because I haven't been to see him in more than 2 years but he's a wiring guru. If you can't find his shop, head down to Drag International off I-595 & University behind the Carmax. They often use Jimmy to wire up RB swaps and should be able to help you find him if you are nice to them

With respect to the lines, I ended up buying an RB26 compressor with end fittings from Drag International for cheap, mounting it up on the motor (no mods needed) and then taking the car to an A/C shop where they joined the stock KA24DE lines with the RB26 compressor end fittings. Cost me like $80 and works well. A/C blows cold but beware of the fact that it makes the motor run HOT!

[wbod240]

How's it going guys i have adapter plates that allow for the Do-It-Yourself peeps at any level of experience to bolt on their complete existing A/C compressor with stock bracket (ka-soch/doch) directly to SR or RB enging block. you dont even have to discharge your refrigerent if you just set the compressor with lines off to the side. thats if you havent done your swap yet. SAVE YOUR MONEYand YOUR REFRIGERENT. my friends use the plate and have a few strangers loving the simplicity.

[email protected] for pics or more detailed info.i've performed many-many swaps, finally decided to end this delema with this Adapter Plate.

[SullivanRacing06]

HAH yea cause im really gonna waste my time making AC brackets for KA compressor's on RB's. and insulting me is the absolute worst thing to do.

p.s. i work at a performance shop for a living. it would take all of 20 minutes to make one of these brackets during my workday tomorrow. .

NO

dude. your REALLY starting to bother me.

im gonna say this one last time

NICO IS NOT YOUR PERSONAL ADVERTISING SPACE. STOP TRYING TO SELL THINGS YOU FABRICATE, TO MAKE MONEY.

i laid down the rule. you email me pictures or you will not be selling these here. this is VERY fair on my part because your arent an advertiser of the board and as a general rule we delete all posts pretaining to manufacturers and shops selling things that arent paid advertisers.

FINAL WORD.

yo joe, man i wish the lil icon list had one for you bit@h slappign the dude trying to sell a/c brackets! haha, bump for you!

[Darius]

It is that time of year again fellas. Summer is right around the corner and those of us without A/C are stocking up on adult diapers to catch the ensuing river of a$$-sweat ...but not for long!

300Plus and I sorted out an A/C wiring guide for the S14 leaving the hoses as the only missing piece of the puzzle.

Uncle Darius is coming thru just in the knick of time! I'm getting hose ends made up for the RB25 compressor and S14 condenser (hot side). Is anyone interested in me having some additional ends made or possibly putting together a hose kit? Hose ends will be CNC milled so they'll be bling blang and cost about $25 each (3x$25=$75). I am thinking of putting together a hose kit that will probably be ~$100. Not a bad price since the stock lines typically cost ~$50 and they need to be hacked up and rewelded anyways.

E-mail me with interest or questions and I'll put you on the list.

<edit: My e-mail address is [email protected]. It should be listed in my NICO user profile.>
Modified by Darius at 7:46 AM 3/6/2009

[noodl35]

i'm interested in this a/c kit

I couldn't find your email. My email is [email protected]

Thanks

David

[imotion s14]

I saw that Aeroquip came out with AN A/C lines now. Anyone try that?

[Darius]

I looked into that, but they are ungodly expensive. Each hose end is about $35 plus you would have to have custom male o-ring hose ends made up for ~$25-30 each. So for a complete kit, it will run you about $300 with SS braided line. And that is probably being a little stingy.

Plus then you run SS braided line, which isn't much more efficient than rubber lines. Both are about 20% less efficient than running solid tubing.
Modified by Darius at 11:52 AM 3/6/2009