Hi Bruce,
RPM: a generator set on a honda clone runs at 3600 Rpm for 60 Hz
CO flame speed: flame speed changes under pressure but still would be limited above the 3800 Rpm marker, the gas would still be burning when the exhaust valve opens
Most gas from charcoal gasifiers have a % H2, that speeds up the flamespeed a lot… and make it more useable at higher rpm
I use the same charts as reference , to make good gas, my advice: use those value’s
for your setup:
For the original spreadsheet i will post a link later , so this would be available for use
The spreadsheet / variables to be altered, will be in yellow, outcome in green ? 
I work with the multiple nozzles since 2 years now, even with automatic open and closing from nozzle openings.. only pro’s not con’s so far.
I am very positive about this work from Kristijan, now only to give him some corrected background/research to use the correct terminology 