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ground the cutout to the chassis or are you talking about water injection?

Ground the cutout at the chassis. Otherwise it uses the exhaust as a path to the engine ground wires, turning any aluminum on the way into white powder. In my case the aluminum exhaust gaskets I bought were slowly disintegrating.

And the meth injection looks good. I wasn't knocking your design, just curious because I wondered about even distribution to each cyl too. It's just a trade off between equal delivery and heat absorption, really no one ideal setup.

Looking forward to more updates!

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intresting i would never have thought to check that before. thanks for the heads up.

Thanks again to dustin, used the files you sent me to get the wiring sorted. I had just enough spare toyota relays and pins to make up this relay box.

I used the fuses for the systems that the relay box holds

I am using a spdt relays to run my meth injection and spraybar

the first spst relay to run the IC pump continously and the second will be used for the Fogs

and they are the same relays from main fuse box so if one goes out on the road i can quickly swap one from one of these non critical systems to get me home