yeah, this is why I was considering the HSV from aquimist. Basically, it's a fuel injector for water. So you could keep the pump running all the time at full pressure and use the HSV to control flow.
The valve would sit directly on top of the nozzle, so there'd be less than 1" of pipe to fill before spraying. That's damn near instant.
However, the damn valve costs $220!
If I were to do it with a regular kit, I'd plan on putting the pump as close as possible to the nozzle. Basically, where the stock airbox was so I could keep the pressurized line to about 6" or less. That should help the delay between pump activation and spraying.
But, there will still be a delay. Not much, but some delay. The motor takes time to spin up and the pressure will take some time to build.
I believe a fuel injector will work, but eventually rust out because it's not designed to work with water. The aquamist HSV is stainless steel....
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