Yes There are two very good resources . First Our own host here "Spud Miller" Has spent years learning Magnetos, Mechanical fuel Inj. and of course the use of Nitromethane. Spud has on his Website somewhere still a compilation of his findings and advice on running different %'s of Nitro even for bracket racing. He hides no secrets , Spud willingly shares info with his customers. Spud wants you to enjoy success. I might be stepping out of line here and if so please forgive me as I am an open Kimono kind of guy. The other excellent Source on this subject is Bob Szabo , long time close friend of mine and racer. Bob also has gone down the long road of learning this stuff using the scientific method instead of monkey see monkey do that has proliferated Nitro and Mechanical fuel injection use. Both of these men come from Science/Engineering backgrounds . When some one would tell them something was gospel about FI or Nitro , they did not swallow the info until they could prove it or disprove it with facts. If either one of them tells you something to help you, take that check to the bank and cash it. Search Spuds website for his notes, Call Him, Email him, the same with Bob Szabo . If you are serious about running even small amounts to help your performance they can help. I could go on more about what each one has done to help me and my efforts through the years , but that won't help you. Reach out and call them.
And when you do call them tell them Flash Gordon said to call them.