Water/Meth Injection after TB

 
Old 06-03-2018, 05:30 PM
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Default Water/Meth Injection after TB

Hey all,

I have an AEM water meth kit in my daily B16 GT28 setup. I've had 2 throttle bodies go bad. The behavior that caused me to consider them bad is that they stick and become rough to rotate.

One was OEM. Another was Omni.

Basically the grease is being washed away from the bearing surfaces. The boost pressure must be forcing the water/meth mixture through the small crease where the throttle plate rotates. It's a pain to have to regrease my throttle bearings every month or so depending on how much I'm flooring it. I would like to find a solution.

One idea I have is to run a TB spacer and have the nozzle there, after the TB. Does anyone have any experience injecting after the TB? My main concern is even distribution of mist between the cylinders.

Please weigh in!
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Old 06-03-2018, 09:52 PM
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Default Re: Water/Meth Injection after TB

It means that you have your sprayer too close the throttle body opening itself. You need to back the nozzle spray up about 3 or 4 inches at the elbow of the intercooler connecting to the throttle body. The methanol is not having enough time to atomizer and you're killing your TBs as a result of it.
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Old 06-04-2018, 04:39 AM
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Default Re: Water/Meth Injection after TB

If you're not using direct port injection (like having each runner on the manifold tapped with a meth injector) then the next best thing is to have the meth injection as close as possible to the intercooler on the cold side piping. That way the spray has as much time as possible to atomize and evenly distribute itself in the air stream before it reaches the TB/manifold.
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Old 06-04-2018, 07:01 AM
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Default Re: Water/Meth Injection after TB




I have my injection point at the bend after the intercooler, a good 2 feet before my TB. See pics as stuff looks right now. Dirty and all. (yeah, flasks are my catch cans)
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Old 06-04-2018, 07:52 AM
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Default Re: Water/Meth Injection after TB

You’re methanol nozzle bung looks way too tall. The nozzle should be at least even with the inside of your ic piping. I bet that alone is disrupting the atomization of the methanol. Is it pooling down in your intercooler too?
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Old 06-04-2018, 08:10 AM
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Default Re: Water/Meth Injection after TB

That's still not at a good spot, as it's hitting right at the elbow of the intercooler and doesn't deflect the flow of the droplets appropriately.

What are you using as a Methanol mixture? How large is the injector? (cc or lbs flow rate?)
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Old 06-04-2018, 08:14 AM
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Default Re: Water/Meth Injection after TB

Is the injector flow head just hitting the wall maybe? It might hit the wall and form a river on the charge piping. maybe??

Id do it this way(ms paint warrior) :
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Old 06-04-2018, 08:39 AM
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Default Re: Water/Meth Injection after TB

Originally Posted by Balor_Gr View Post
Is the injector flow head just hitting the wall maybe? It might hit the wall and form a river on the charge piping. maybe??
https://www.youtube.com/watch?v=3ZBeatGKLpI

Id do it this way(ms paint warrior) :
I do as well, but not at the lower elbow before the BOV. Much higher past the BOV at the last turn before the TB on the I/C pipe. You're not atomizing

Last edited by TheShodan; 06-05-2018 at 05:43 AM.
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Old 06-04-2018, 12:47 PM
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Default Re: Water/Meth Injection after TB

Everyone here does it exactly that way. Last turn targeting the TB plate. Its a different strategy from the closest to I/C outlet.
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