I have two questions that may be simple.
1) Does a 1993 R1 use R-134 or r-12 refridgerant?
2) I have located the fill lines. But which of the two nozzeles is the high pressure, and which is the low pressure?

Thanks, and yes I have searched.

 

R-12 for sure.
And on ANY a/c system, the larger hose is the low pressure or 'suction' side, the smaller hose is the high pressure side.
DO NOT **** WITH THE HIGH PRESSURE SIDE!

 

Appreciate it
Also, How can you tell if it has been converted to r-134?

 

The fittings will look different, a bit bigger if it has been converted. Legally, the person or shop that did the conversion is required to attach a decal stating this.
I will go take a couple of picture of a converted system and an R-12 system.

 

Great, Thank you!

 

 

notice the aluminum fitting just under the blue plastic cap. THIS is the conversion piece that screws on to the stock R-12 fitting. That smaller fitting under this is the stock R-23 fitting, so you can see the big difference in size.

 

Is there any way to make the A/C kit without any of the stock parts?

 

You mean fabricating custom lines, custom mounting evaporators, driers, condensers, compressors etc?

It would be wildly expensive. Easier to buy a used set from the classifieds.

 

Most R-134A retrofits will have a red and a blue cap.