meth injection set up info needed

[cavamaroZ28]

im lookin to purchase a snow performance meth kit and im wondering if anyone here has one on there car and can kinda walk me through the set up. pic, pros, cons, helpful info all welcome.

[blackbirdws6]

I have a stage two kit. Pretty simple setup and the install was easy as well. Are you doing it for safety, performance or both?

[shownomercy]

Useless, save yo monies.

[cavamaroZ28]

I have a stage two kit. Pretty simple setup and the install was easy as well. Are you doing it for safety, performance or both?

both. im running a forged 396 with a t-trim. the goal is between 7-800 hp and im well aware thats pushing it so i figured meth would make that goal a little easier and safer to reach. the 2 sprayer nozzels... where do u have them hooked up?

[GuillaumeC]

I have my 2 nozzles in the intake elbow (Trick Flow aluminum elbow), works great.
Make sure your pressure switch is connected to the intake manifold post-TB and NOT in the charge pipe.

[blackbirdws6]

I run two nozzles about 3-4" from the throttle body.

[cavamaroZ28]

I have my 2 nozzles in the intake elbow (Trick Flow aluminum elbow), works great.
Make sure your pressure switch is connected to the intake manifold post-TB and NOT in the charge pipe.
explain "post-tb" like right behind the tb?


I run two nozzles about 3-4" from the throttle body.
my old buddy had it put in his cummins and he drilled holes in the front and back of his intake manifold for the nozzles... i didnt think that was right and deff didnt wana put holes in my intake lol im glad thats cleared outa my head. thanks!

[cavamaroZ28]

now the stage 2 uses some maf controller. does that work off my factory maf? i was going to run speed density so no maf...

[94Blackbird]

explain "post-tb" like right behind the tb?


my old buddy had it put in his cummins and he drilled holes in the front and back of his intake manifold for the nozzles... i didnt think that was right and deff didnt wana put holes in my intake lol im glad thats cleared outa my head. thanks!

You have to remember that a diesel doesn't have a throttlebody. With the way cummins intake manifolds are I imagine that his idea was to as evenly distribute the injected water/meth, and to keep the water/meth as cool as possible before entering the cylinder.

[blackbirdws6]

now the stage 2 uses some maf controller. does that work off my factory maf? i was going to run speed density so no maf...
My stage 2 has a vacuum/boost reference line which just needs to be connected to the intake manifold in some way. The box has settings for when the meth will trigger. Mine was set by my tuner and I believe it comes on around 4lbs of boost.

[GuillaumeC]

explain "post-tb" like right behind the tb?

Not necessarily right behind, but anywhere in the intake manifold where the reference line or sensor will see vacuum and boost.
The pressure sensor needs to see vacuum as soon as the TB blades close to shut it off immediately.

If you get the boost reference signal from the charge pipe or compressor housing, there might still be some pressure there even after the TB blades close. That would keep the water/meth on for a second after the blades close and can cause sputtering. It was a problem on my car at first and a friends turbo Mustang. Connecting the reference line to the manifold fixed the problem.

[ZOHAN]

now the stage 2 uses some maf controller. does that work off my factory maf? i was going to run speed density so no maf...

The stave two uses a MAP (manifold air pressure) sensor. Not the MAF. Even if you are speed density you still have a map. It uses the map to sense amount of boost for when to turn on and how much to increase

Making you silky smooth...

[cavamaroZ28]

The stave two uses a MAP (manifold air pressure) sensor. Not the MAF. Even if you are speed density you still have a map. It uses the map to sense amount of boost for when to turn on and how much to increase

Making you silky smooth...
theres a bunch of stage 2 kits that work off of the maf but i found the one that uses manifold pressure. i was lookin at the wrong one

[Still2slow]

I Tee'd into the brake booster vacuum hose for the map reference on my alkycontrol kit. If you haven't purchased yet don't rule out alkycontrol, I've installed them on f-bodies, c5's and even a fox body. Nice kits!

[cavamaroZ28]

I Tee'd into the brake booster vacuum hose for the map reference on my alkycontrol kit. If you haven't purchased yet don't rule out alkycontrol, I've installed them on f-bodies, c5's and even a fox body. Nice kits!
i havnt bought anything yet. just trying to understand some things befor i get into them lol i have a few vacuum ports on the side of the intake that aren't used and had em capped. im guessing i could use one of those right? also do these kits regulate how much meth to spray based on boost? like... the more boost the more it sprays? or is it a constant amount no matter what the boost is.. sorry if that was a dumb question lol still learning here

[shownomercy]

Most of the simple kits vary amount of meth sprayed by size of nozzle, so pick how much you want and "jet" accordingly. Once the pump is kicked on, its spraying that much etc, some kits can ramp up pressure for a not so abrupt initial hit but again, fancy.

[Still2slow]

Yea you can use one of those ports. It is a fully adjustable progressive kit with controls for activation point, how quickly it increases volume, and total volume sprayed. It's best to let an experienced tuner set it for you on the dyno.