Well , after talking to Mel at Universal Cylinder Service in Salt lake . And buying a bottle from him, I have the system plumbed with 5/16 steel tubing running to the front x-member just under the base of the radiator. Then with nozzles aimed at each side of the block.
Mel says the trick is to run small diameter lines to maintain the pressure, then hit the diffuser in the nozzle with pressure not volume . The bottle has lots of pressure, I mean LOTS. Then I built the spring loaded trigger mechanism , similar to the Halon set up we have had for years , and has always passed tech.
I am going to give the system a test and will plan on video taping it , since the bottle only costs 13 bucks to refill , hey, why not !
If you guys in Salt Lake have questions about fire systems , Talk to Mel, hes an old oval track racer and an ex fire marshall, knows his stuff and is fun to talk with ! I did about a half day's worth of chasing my tail before I found him.