a/c on sr

[fullrunsilvia]

im getting my sr in about one week and its a must that i hook up my a/c because im movign down to phoenix next year. im getting a s13 sr and putting it into my s14 can anyone tell me how to do this. i heard of using my ka compressor and i have also heard of using my sr compressor, but i dont know which one to use and what to do.

[Movingviolation240]

SR compressor, custom lines (with SR ac compressor lines and KA lines on the firewall) , and a toggle switch on the compressor to turn it on and off.

Paul

[BuudWeizErr]

Just unbolt the A/C compressor off the KA and bolt that up to the SR. Not all the bolts will line up, but it should still work.

Isn't that what he should do in this situation? And then wire it of course.

[Movingviolation240]

don't think it works with an S14 AC comp, at least I couldn't make mine work.

Paul

[BuudWeizErr]

Hmm, interesting, I thought that the KA's would be the same. Guess not. The myth seems to work with an S13.

Meh, A/C is overrated.

[kclem69]

Well it didn't work on my S13. I thought I had done all the research and had everything figured out, but when I installed a KA compressor (using only 3 bolts) the compressor pulley didn't line up squarely with the drive pulley. There's no way the belt will stay on. I even spend $100 bucks for a newer KA compressor to see if it would line up and it didn't. I think this is a myth. I'd like to see pictures where someone has actually used a KA compressor. I'm going to have custom lines made and use my SR compressor. I suggest going this route when planning for the swap.

[ItzGenX]

For S13, It should work. My 3 rib belt doesn't line up for my a/c compressor, all I did was get a skinnier belt of the same size for it. Even though my compressor and such is mounted, my a/c does not work. I have my KA ecu still in the car along with full harness. The ecu does not see a running engine, so it will not let my compressor turn on. I hope I can figure out how to wire up my haltech ecu to the a/c system as it can control such things with programable outputs. I can also toss out these two crap harnesses and have one clean one.

You can make the S14 KA compressor work with S13 ecu, it is just for all the functions that the S14 KA ecu uses to just let the compressor turned on needs to be bypassed with a switch. The S13 system is only a few wires and very simple as all it does is recognize if the a/c compressor is on and up the idle.

[BuudWeizErr]

kclem, maybe you need to use the pulley off the SR compressor?

I'm not totally sure, even though I live through hellish summers, I have no A/C parts in my car, I took everything out. The only real info I have is from HT and SCC.

[D1SR240]

check http://www.heavythrottle.com it says something about it there.

[haddixracing]

I have a 93 S13 with a 92 SR20DET and I used my KA24DE compressor and lines. I wired it up using the KA24DE relay and the A/C on input wire from the SR20DET ECU goes to the KA24DE energize input on the relay. My A/C works and blows cold. The KA24DE compressor bolts up to the SR but you have to use the SR compressor bracket no the KA compressor bracket. And only 2 of the bolts work NOT 3.

[fullrunsilvia]

thanks guys for all your input this has gave me the information i need to try to rig up my a/c. i should be getting my sr within the couple days so i will keep you guys posted on the progess

[martin]

I have a 93 S13 with a 92 SR20DET and I used my KA24DE compressor and lines. I wired it up using the KA24DE relay and the A/C on input wire from the SR20DET ECU goes to the KA24DE energize input on the relay. My A/C works and blows cold. The KA24DE compressor bolts up to the SR but you have to use the SR compressor bracket no the KA compressor bracket. And only 2 of the bolts work NOT 3.

I agree with what you are saying here, I've got two working AC systems in '92 SR's using the KA compressor, SR bracket, and only two bolts.

My wiring solution is a little different as I build my own harnesses using KA and cut SR, so all the KA AC wiring just stays the same. The only thing I have to do is put in a switch to turn on the AC rad fan as the SR ECU doesn't have provision to control this.

I also agree that SR compressor with custom AC lines would be a better solution simply becasue you'd have more bolts holding it on! EIther way the wiring would be the same.

-Martin.

[haddixracing]

My wiring solution is a little different as I build my own harnesses using KA and cut SR, so all the KA AC wiring just stays the same. The only thing I have to do is put in a switch to turn on the AC rad fan as the SR ECU doesn't have provision to control this.

-Martin.

I used a complete SR clips so I used the SR ECU / engine harness with some simple adapters I made to plug into the KA engine room harness and I extended the ECU portion that goes thru the firewall about 3'-6" to make it reach to the passenger side and go thru the firewall.

I also have a very thick SR radiator that came with my clip and I am using the SR fan shroud and mech fan so there is no need for the A/C electric rad fan at all.