luftweg

FREEZE 12®, http://freeze-12.com/ , claims that it is approved for use in cars. I thought that it actually might be the same substance as Duracool, but the ads claim it is not flammable. Now, there still seems to be the issues of separate recovery and instruments needed for the use of alternative refrigerants. This could be a factor, although the advertisement claims that it will be distributed and available...

Actually simply the fact that it is a 'mixture' of hydrocarbons does not support not using it. I mean, I'm sure there are people who wouldn't want natural gas stoves or heating in their houses citing supposed safety reasons, but the statistics don't support such worry. Of course, you could NOT use the same argument with gasoline -- not having any of it in your car, because it's dangerous! There's far more of that in a car (usually), than there is refrigerant, and it can be much more dangerous; if it's okay to have gasoline then why not R-12A? So, I wouldn't condemn R-12A just because it's a hydrocarbon. The Duracool site does give safety data and statistics claims.

I used the 'new' R-12A by Duracool, and it works great... the AC is now very cool. Check out their website. The R-12A is compatible with the oils for R-12, and runs at pretty much the same pressures, and cools much like R-12. It is legal and claims to be safer for the environment than R-134A Anyone else use this new refrigerant yet?

I wish it were that simple. Problem seems to be the computer system can't communicate with the newer engines and drivetrains.... and it seems that the later SC parts can't be adapted to the older engines due to physical differences between the earlier and later engines. I suppose you could throw out the Reatta electronics and use the donor's, but I wouldn't touch the re-wiring nightmare of the rest of the car with a ten-foot pole.... nevermind all the dash re-fabrication needed. I'd rather buy a vette first. This is one of the reasons I was contemplating keeping the stock motor, but adding an aftermarket centrifugal SC. Search the posts on this site for supercharging.... there have been a couple of people who have successfully done it via series I or II SC engine/drivetrain swaps. I am too much a newbie to Reatta now; gotta listen to those who know first.

I used the 'new' R-12A by Duracool, and it works great... the AC is now very cool. Check out their website. The R-12A is compatible with the oils for R-12, and runs at pretty much the same pressures, and cools much like R-12. It is legal and claims to be safer for the environment than R-134A Anyone else use this new refrigerant?

I have seen here talk about the swaps of Series I or II SC engines into the Reatta. But no one has mentioned the possibility of using an external (Paxton type) centrifugal supercharger. Now I realize some of the potential problems, such as the need to beef up the bottom end and drive train, lower the compression ratio, sensor issues, and the fact that the engine may not recognize postive pressure. But are these insurmountable. Can the computer be made to talk to such an engine? I talked to a mechanic who does SC conversions and he claims it can be done -- reasonably. Is this correct? Anyone know?

I have an 89 Reatta, and have a rattle issue. Although, I'm not so sure if it is from the front or back. If I have my foot on the service brake while going over a bump, it DOES NOT rattle. If I go over the bump without the service brake pedal on, it DOES rattle. Now, seeing that the e-brake uses the rear brakes only, when I set the e-brake partly and drive over a bump, it still rattles. Might this not mean that it is the front rattling? And what exactly is rattling, the pads, or some other portion?