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First thing, it is all trial and error.
Have your turn on slightly lower than you get knock at without the propane, if you can run 18psi of boost without it, set it for 15-16psi (uses less propane in part throttle driving). If you still get transitional knock lower your turnon point another pound or two.
You should be shooting for 100% duty cycle on the "Injection Control" and adjust the jet accordingly.
As for the regulated pressure, anything over 100psi is fine and the lower it is, the less effect the weather and cooling of the bottle will have. I only get 160-170psi on a full bottle so I run mine at 125psi and still have at least 130psi in the bottle when I refill it (it took .7 gallons)
Have fun and good luck tuning.
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'89 TTA #332 12.973@111.45 (on BFG Radial TA's) stock injectors, turbo, intercooler, and downpipe. Hotwired WB340, RJC power plate, ProPain, usual free/cheap mods.
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