Using LP to boost hp and reduce burn temp has been done in the past, but only with a carb/mixer combo. A company called Quantum has injectors which can be Y coupled in a special fitting with a gasoline injector and a gaseous LP injector (their product) using a simple pressure regulator. Have a...
These injectors are designed for gaseous LP, NG and H2. Look at www.qtww.com May be the answer to problem. Have used on liquid with good results. The main issue is thermal, not pressure, as these can handle many bar., FD
