I just realized that not only did I make a pretty huge typo in this thread, I hadn't actually captured the information anywhere else:
https://www.northamericanmotoring.co...ml#post4539355

I'm reposting this here in an effort to spread some knowledge. This works for me, it may not work for you. However, you should know that it is an option before you spend money on a "kit" that is based on a parts list. Buy the components yourself, build the system yourself, don't let some middleman "speed shop" rip you off.

This is based on my personal experience with USRT. Scott may have changed some things or gotten himself sorted out since this was posted. I'm leaving my caveat in the post because it was relevant at the time. Scott is very knowledgeable and can build you an amazing system, unfortunately, we had some issues. I do not think this represents how Scott typically operates. I will update this post with photos later.

DO NOT USE USRT. I contacted Scott at USRT in February of 2019 to help me design a custom direct port WMI system. He seemed very knowledgeable and friendly. I ordered (and paid for) $1000 worth of his equipment and was pretty excited. Well, Scott totally ghosted on me after I paid. He totally flaked and would not respond to emails or calls for months. I had to go through PayPal to get my money back.

Parts List:
Devil’s Own:
• 2.25 Gallon Race tank
• Bulkhead fitting/tank tap

Pro Meth:
• 0.50 GPH/32 CC Per Minute Water Methanol Injection Nozzle × 4
• 2.5 GPH/157 CC Per Minute Water Methanol Injection Nozzle × 1
• NPT Elbow Nozzle Holder With 1/4" Push Fitting × 5 (the push-connect fittings have been replaced with compression fittings sourced from a hydraulic supply store. Much more secure, zero leaks)
• 1/4" Hose to 1/8 NPT Male, Straight (Teflon) × 6

AEM:
• 35-4500-20 ¼” Hose 6’
• 30-3326 Water/Methanol Injection Solenoid
• 30-3300 AEM V2 Water / Methanol Injection System

Vibrant
• VPE-2690 Vibrant Performance Vacuum Distribution Block

BSH
• Dual Boost Tap

This is what I used. Initially, the Devil’s Own stuff came from USRT, it was the only stuff that actually shipped and it shipped directly through DO not USRT. Prior to deciding to go direct port, I had installed the AEM 30-3300 kit with the tank and pump located in the rear hatch and the controller mounted on the dash. The system has worked well and the only issues I have had with it came from the low tank warning. The tank level would read incorrectly and display a fault for a low tank. Removing the sensor and shorting the wires solved the problem.

Scott from USRT suggested that I use 30cc nozzles in the intake runners and a 175cc 157cc nozzle in the charge pipe. Pretty much every WMI calculator I could find validated this, so once he dipped out on me, I ordered what he suggested through ProMeth. Devil’s Own had shipped a 175cc 157cc nozzle to me, but I did not install it because I had the AEM kit and I did not want to reduce the nozzle size until I completed the build with the additional nozzles in the intake runners. When the ProMeth nozzles arrived, there was no comparison. The ProMeth quality was hands down superior. If I was to do this all again, I would have used them in the first place. I will probably upgrade the AEM pump and solenoid with ProMeth equipment, but it is not currently a priority.

The install was straightforward, the AEM controller and AEM solenoid control the flow based on the boost pressure relayed through the boost tap. The solenoid is installed before the distribution block and the nozzles are pretty self-explanatory.

I tend to run 50/50 VP M1, but I am switching to 100% water. So far it works great on the street/freeway. I have run a few tanks of just water through it and the motor did not explode, so I feel pretty comfortable with it. I’m going to run it pretty hard at Road Atlanta this weekend so I won’t know if it was all really worth it until then. This system has been run on Road Atlanta and Roebling Road Raceway many times and has kept the intake valves clean, the oil and water temperatures in the nominal range, and has zero adverse effects on the motor.

N18 with RPM Stage 3, mQubed 43/56 turbo, mQubed downpipe, K&N Apollo intake mounted through the bulkhead.

 

This definitely makes me feel better about using Prometh for all the components in my methanol system. I saw most people using the aquamist system on here but their parts are coming from the UK which is a pain. I haven’t used any of my Prometh stuff yet since I’m still building the engine, but it definitely seems like quality stuff and the support has been good from them so far when I had questions. Did you run your meth lines on the underside of the car when you set your system up? I’m assuming you put the tank in the trunk, any issues with that for passing tech at tracks?

 

I mounted the tank in the rear and ran the line under the car along the brake lines. I haven't had any issues with tech, but HPDE tech is a little loose as it is. Since I only run water I am going to have to ask for a rules clarification eventually. Worst case scenario I have to build a bulkhead.

 

I guess I’ll need to look at the rules then for my local tracks although I’m trying to take my mini to a drag strip when it’s done so I’m not sure how loose it’s gonna be on the rules. Are you just running the nylon line on the underside or did you use a braided AN line?

 

I just run the standard nylon lines. Once the push-connect fittings started to leak, I had toyed with the idea of using AN fittings but ended up using compression fittings.

 

Install looks CLEAN
I'm currently doing a single nozzle wmi, mainly so when I finally do the tune I can have a bit more peace of mind. Did you go direct for power or safety?

 

Is ProMeth still the go-to for building WMI system? The don’t have good reviews that’s why I’m asking. And there seems to be a good debate about straight water vs water/meth. I will never do racing, I want the steam cleaning.

 

Scotty, can you post a better picture showing where the injectors are installed in the intake manifold?

 

yes please too

 

Bump if anyone else has interest in this discussion and can share their thoughts experience with single nozzle at the plastic factory charge pipe post FMIC?

 

I used a snow performance single nozzle at that location. I had a stage 1 from Manic, using 50/50 Boost Juice. No issues other than it making everything red lol. When I went catless and a proper tune from Prototype-R, I went with the 4 nozzles on the intake plus the one the plastic piece post FMIC running 80/20 now

 

great stuff! I know pretty much nothing about spec’ing out the right single nozzle setup, and nothing about installation the right way. Any idea where I can go to find to a good easy to follow DIY write up or even better video for Mini install? And I plan to just run water but who knows …

 

You're definitely going to want to research as much as you can. Different brands and stuff make different things. I know Snow Performance has a chart, but it's something you will want to talk to your tuner or a tuner about what's recommended for your setup. My tuner is the one that helped me dial in what sizes and what ratio to run. I dont think you can run just water? Probably be best to start at 50/50. Why are you going with this setup anyways? Any particular reason?

 

single nozzle setup is what Mario told me to go with for his tune. Adding water or anything else should really help with steam cleaning the cylinders given the horrific DI carbon buildup. Unfortunately Mario doesn’t sell the kits but perhaps he knows a guru.