Correct me if I'm wrong but if I am going to run E85 with a wet nitrous kit I would only need enough injector to support what the motor makes on motor alone? Although the fuel solenoids will be pulling from the fuel pump so that will need to be large enough for total power?

with that said I am going to use a holley 12-1800 fuel pump and I would like to have enough injector to make 500-550 on motor. what do you guys suggest? will 60's(72's at 58psi) get the job done ?

 

Siemens deka 60 pounders will be plenty, that's what I run on mine on e85..

You will want to watch the fuel pressue if your pulling it off the rail. Any drop will cause a lean spike if your pump can't keep up on the hit