Progressive NOS (WAS Re: Part 2: Reading Plugs, pistons,

[Dave Williams]

-> IMO, there is just no way *so far* to accurately modulate a 800ish
-> PSI solenoid.

 Use several on/off valves, each twice as large as the previous one.
The precision of the flow metering would depend on the number of valves.
Eight valves would give you 2^8 or 64 steps.  Ten valves would be 2^10
or 256 steps.
                                                                                                        
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