Running meth?

Lebedin8654 · May 25, 2009

i am just wondering where are ya'll putting the nozzle at for your meth injection? there is two spots on my s-trim for a nozzle one is on the outlet thats where i have mine and there is a spot on the back side of the unit, it looks like it would inject into the blades. Would this cool the head unit more or would it mess the blades up?

blown98gt · May 26, 2009

noooooo lol

Either A: Put it on the intake too approx. 3-4'' from the TB
Or B: Drill and tap your Plenum and put it directly into it.

you don't want to put it into your blower... at no point is water/meth mix (since it's never straight meth usually 49meth/51 water) ever a good idea to put into your blower lol

EDIT!: Also Meth is for cooling the air that is going into the intake (In the engine) i've never heard of anyone running the meth into the s/c and i don't think it's a good idea at all to be shooting meth into your s-trim

MustangChris · May 26, 2009

is there a benifit to this for a N/A car?

blown98gt · May 27, 2009

not really... yeah you can drop intake temps but it's more for boosted apps

Lebedin8654 · May 27, 2009

What about the setups that inject the meth before and after the blower

95SC · May 28, 2009

My brother has been spraying before the blower for 3 years ,so far so good .

blown98gt · May 28, 2009

it's not recommend by any one what good does meth do to inject into your blower?

I mean please explain this to me?

the point of meth is to raise your oct. while dropping your intake temp. I bet by putting it before the blower it doesn't drop the temps near as much as mine does. Snow Performance even shows you exactly where to put the nozzle.

Either way, i don't think that putting meth before the blower does any good at all. Except spray meth water mix into your blower blades hoping to help the rusting process along

95SC · Jun 1, 2009

Intake temp dropped by 70* on my brothers car spraying meth before the blower and car picked up 35 rwhp during dynotuning.Like I said before he has been spraying before the blower for 3 years already and got around 200 1/4 mile passes running on meth.I don't know which one is better but the one my brother car works fine.

blown98gt · Jun 2, 2009

i know you said he's doing it i'm just saying that i don't recommend it and after all the write ups i've ever read everyone put it after the blower.. i've never seen them before the blower.. i gained i think 45-50 hp or more on mine i'd have to dig up the dyno sheets but i saw between 100-110 deg drops

El_Diablo · Jun 8, 2009

Lebedin8654 said:
What about the setups that inject the meth before and after the blower

whats the point? the mixture isnt going to be cooled any more or any less and at the point your just saturating your cylinders, not good

as far as N/A, it can help, not nearly as much but it still helps increase power, most guys will see between 5-30hp depending on the N/A setup and tuning done to the car to take advantage of it

blown98gt · Jun 8, 2009

i think it might be blower specific in this case i mean for me to put mine right before the s/c is stupid because air travels through a intercooler and tons of pipe before it even make it to the intake.
I run a stage 2 boost kit that activates off boost i think it comes in around 4-5 psi all the way till i let off.

EDGE · Jun 9, 2009

i run the stage 2 snow kit too, i'm injecting as close to the outlet of the blower as i can to give the meth/water most time to vaporize fully before it hits the cylinders. The meth is used to cool the air, it does raise the octane but you're spraying so little its negligible.

I did my thesis on methanol injection but here is the crux of it...

using a time frame of 2 revs at an engine speed of 5,000rpm, injecting a know quantity of water:methanol at a mix of 50:50 the energy required for vaporisation of the mixture is 139J. This after another page of calc's using the data of mass of air from the MAF it results in a charge temperature drop of 23.63*C. This increase engine hp from 293bhp to 325bhp. This increase is not ONLY down to the denser air though, the ecu also advances the ignition to take advantage of the cooler air, so some of the power increase has come from increased ignition advance... This only works if your mix is fully vaporized before it hits the IAT sensor. If its not it will wet the sensor and it will record a much lower temp, advance the timing too much and ping its little pistons out !!!

huh.... the majority of 6 months work in a few lines !!!

8byah6 · Jun 9, 2009

i've been thinking about adding it to mine just for the oct.part so i can up the boost alittle more but i'll be injecting after the temp sensor will it still show any gains ?

95SC · Jun 9, 2009

blown98gt said:
i know you said he's doing it i'm just saying that i don't recommend it and after all the write ups i've ever read everyone put it after the blower.. i've never seen them before the blower.. i gained i think 45-50 hp or more on mine i'd have to dig up the dyno sheets but i saw between 100-110 deg drops

So ,if meth dropped your temp by 100 deg then your intercooler must suck bad ,it's doing completely nothing there.My brother didn't want to put intercooler on his car ,that's why he's running meth.

blown98gt · Jun 9, 2009

my intake drop is the result of both meth and intercooler

95SC · Jun 9, 2009

I don't get this,first you said meth dropped your intake temp by 100 deg now you're saying that meth and intercooler did that.Did you install intercooler and meth at the same time?

blown98gt · Jun 10, 2009

yes they both got installed at the same time, i am just going by normal intake temps for procharged 4.6 motors and what mine was. then the temp that was left i just figured it was from my meth kit

oemracing · Jun 11, 2009

I am running meth on my evo. not sure of the intake temp change, but when I was installing it I googled the placement.
From what I found is the closer you run the nozzle to the throttle body is more for a racing application. Dont recall why that is though. I placed the nozzle at about 8" away, so it was more for a street app. That was on my first uicp. Then my injen pipe I placed it 2" away from the throttle body.
Now my question of why would you place the nozzle in the intake tube going to the turbo? The purpose of running meth is to cool the intake air to the throttle body, so your really not doing anything with it being before the turbo. if anything it is more of a hazard. compressing the mixture that is highly volitale and compressing it, just seems like your wanting to cause a fire or some damage.
my 2 cents is all.

95SC · Jun 12, 2009

Meth kit my brother is running it can't have a nozzle after the blower ,it's a cheap kit without a pump that runs off of boost pressure.

SVTHAHA · Jun 13, 2009

For best performance with water/meth injection on high boost setups you want to run a dual nozzle setup both before and after the supercharger. Running it before the supercharger drastically cools the charge temps and increases the efficiency of the unit. Usually you will pick up a couple of psi because of this as well. Your other nozzle should be placed before the throttle body to give it the chance to achieve proper atomization to further cool the air and increase octane levels. On a lower boost setup, a single nozzle placed before the throttle body is sufficient enough to do the job.

To 8byah6, you will want to relocate your IAT sensor to your lower intake manifold so it can read the reduced air temps. It should always be placed after the water/meth injection point.