[Diy_efi] Intercooled question

[elcamino73]

> Hi,
>
> You might want to use HC-290 refrigerant instead of  R12 or R134a.  It's
> temperature pressure curve is similar to R12 but it is much easier and
> cheaper to buy.  It is much less harmfull to the environment if you have a
> leak too.  In case you can't find HC-290 at your local car parts store,
you
> might try to buy it under it's more common name, "Propane".


I've been looking at this product as well.
http://duracoolusa.com/catalog.html?UCIDs=10423325
What safety issues need to be considered with propane? Can it be used as a
drop in for R12
in an automotive system?

Thanks




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