Water or Water/Methanol Injection DIY - Toyota Yaris Forums

suprf1y · 05-25-2020, 10:00 AM

Nice drill!

I've built a number of these systems and I never liked the idea of a fixed output. As RPM, load and HP increase, more water is required to do the same job.
So the last few I put together I used an automotive fuel pump and injector, machining a block with a boost referenced pressure regulator installed to return to tank, and a simple 555 timer chip based extra injector controller. It worked really well increasing pressure (injector flow) as boost increases and pulse rate with RPM. Aside from being able to choose the ideal injector sizing, with the injector controller circuit you can also increase and decrease the pulse rate based on the RPM input. Your AEM may even have a usable output for that.

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05-25-2020, 10:00 AM	#17
suprf1y Drives: 05 Echo Join Date: Jul 2009 Location: Waterford Ontario Posts: 131	Nice drill! I've built a number of these systems and I never liked the idea of a fixed output. As RPM, load and HP increase, more water is required to do the same job. So the last few I put together I used an automotive fuel pump and injector, machining a block with a boost referenced pressure regulator installed to return to tank, and a simple 555 timer chip based extra injector controller. It worked really well increasing pressure (injector flow) as boost increases and pulse rate with RPM. Aside from being able to choose the ideal injector sizing, with the injector controller circuit you can also increase and decrease the pulse rate based on the RPM input. Your AEM may even have a usable output for that.