[rotrex]

so for you, you could leave the injectors for the petrol at the OEM location.
Install a second set of methanol injectors further upstream and/or pre turbo.
Run a 10l fuel cell with own pump etc. for the methanol or ethanol.
Red Victor, a 2000HP+ street legal drag car running methanol, injects both before and after the turbos.
Add water nozzles whee you deem them useful and skip the sequential injection.

If you need to inject all your fuel within those 9ms, you need really big injectors.

Question is if this is really worth the trouble for the HP goals you have?
As your car is FWD with limited tyre width you will likely already be at the traction limit as is.