I'm a grad student, so no
Okay, I've been noticing decreased spool time (opposite from what I've read on some boards) and have the nozzle pointing directly at the center nut. This tells me that the integration and atomization are key. I'm injecting a total of 850cc of fluid with the preturbo handling 280cc worth of total flow.
4th gear
Post intercooler only:22 psi by 3600rpm
Pre turbo activated at 4 psi (with post turbo): 22 psi by 3400 rpm
I'm wondering if using stages would work better. I haven't inserted the logs into a dyno simulator yet to compare, but I suspect that having the post intercooler jets activate a bit later would help keep EGT a bit higher till full spool. I don't have curves to compare yet, but seat of the pants suggest that torque increases on activation of the pre turbo jet supporting increased mass flow rate with reduced compressor work.
I started playing with timing, increasing a tad during spool to account for the early turn on time. Since I have full pulsewidth control over the system, I have it reduced on the low end such that the flow rate ramps up pretty quickly but begins at a very low flow rate.
I think that the major factors that affect spool are as what everyone has been saying "atomization" at low flow rates. My thoughts right now are that if using a pump, a constant pressure system is the only way to go pre turbo. I can see how reduced atomization would slow spool with the reduced atomization till of course the pump pressure ramps up. Of course if one runs a mechanical system with an air atomizing nozzle the atomization is not a problem as water pressure and air pressure would rise 1:1 keeping atomization good as pressure rises.
My questions now are about calculating total flow rate between the two locations and what works best. Also what can I do to make a dual stage system out of the HSF2 using only one FAV? Can I place a solenoid right before the post intercooler jets to turn on at a higher point? I'm thinking that the PWM will no longer be linear with only one jet spraying and will have a dip once the solenoid opens.
One other thought would be to run 2 FAVs and have a Hobbs switch on one that completes the circuit at a certain pressure.