Has anyone had the change from R12 to the new 134 system? I have been told it doesnt work very well on the C3. If you have had it done, does it work and blow cold or does it not work?

 

It doesn't because of the big difference between R12 and R134a. Since R134a is not as efficient, it needs a larger condenser. That and the fact that even w/ R12, the Corvette A/C system won't freeze you out. It also operates at a higher pressure which means more leaks.

There's more to converting than just swapping gas. You need to purge all of the old oil since R134a uses a different oil. Need to put new charge fittings on. And to do it right, you'd need to replace all of the O-rings since they're not compatible w/ R134a and the new oil.

Probably be better to get one of those replacement systems. Can't recall the name of the company but they're used in a lot of resto-mods.