Going to be installing my new meth injection system soon (Coolingmist) and I was planning on installing the injectors in the greddy elbow. I have the elbow that has the two extra fuel injector bosses, so i was just going to make a little plate to mount the injectors in these spots.

However, i was talking to my friend tonight and he was saying that i may get uneven distribution to the rotors at this location and it was be better to inject further up stream. He injects at both the pre-intercooler and right after it.

At this point, I'm not sure. I've seen injectors locations all over, even some recommendations of pre-turbo, so where should I put them?

A side note i was thinking about. I'm going to mount my pump on the crossbar that the original intercooler sat on (don't know what its called), so i'm thinking that maybe i should put the injectors in the intercooler piping directly above that to minimize distance from the pump. Good idea/bad idea?

The elbow looks like this:

 

i recommend you don't inject pre IC especially w methanol.

i located my 2 nozzles in the silicone coupler directly in front of the elbow. i positioned them at 3 and 6 oclock to bias against the turn in the elbow and favor the secondaries. based on my logged egts that are within 30 degrees of each other (front and rear rotor) and the cleanliness of my throttle body they seem to be working well.

as an aside, if i had your elbow i would remove the two ports and fill them in as they effect the flow. just my 2 cents.

howard

 

http://www.coolingmist.com/detailmain.aspx?pid=047 how about one of these in the elbow pointed directly at the tb? I may be going this route.

 

Please explain

 

That's an awful big square hunk of brass to put in the air stream. I've seen much sleeker 90's made.

 

links?

 

The actual product is much sleeker than that, that picture is literally 3 years old or so.

The elblow will be small like this:

 

oh ok cool, thanks.

 

re injecting methanol/fuel into or pre IC

if you inject alcohol so it is present in your intercooler you may be wasting a great deal of negative BTUs. an intercooler is built to optimise the process of transferring heat. it does this very very well.

if you cool the IC air below the IC temperature, which you will w alcohol, the coolness will move to cool the IC while warming the air alcohol combo. this is exactly the opposite of what you are trying to accomplish.

BTW, this will probably not happen w water but will w 100% alcohol... water doesn't flash as fast.

secondly, since alcohol when mixed w air can explode if you break an apex seal and spit ignition back thru the intake runners and the throttle body is slightly open you could blow up your IC. this probably would not reach your IC if you are injecting around the elbow.

"honey, i blew my....... intercooler."

there are also other more esoteric reasons relating to having a mix of air and liquid clogging up the IC passages...

for me, reasons one and two would be enough...

howard coleman

 

You could add to that Methanol loves to eat aluminum, So nice thin intercooler alu cores are an easy start to the day for it !

Scott

If you dont take this seriously then i suggest you check out ausrotary and there are some pics on there of fuel fittings after methanol attack.....yikes !!!!!!

 

But by cooling the air down before it gets to your intercooler, it allows your intercooler to flow better. I inject pre IC to keep the IC from becoming heat soaked on long pulls, but then again, by IC is smaller than most. I'm not that worried about blowing up the IC, because the AFR inside the IC is really lean, and I doubt it would ignite very well.

 

Intercoolers as designed to run warm Not icy cold. When i added methanol pre throttle body my IAT's droped from 20 degC to -20 deg C and became very random as the meth evaporated from the pipework and other parts. IT took some 5 mins to completely leave the system.

Scott

 

I dont know. I'm on my third season running this setup and it is still fine. Lets me easilly run 24lbs on pump gas running Klotz. I've never had any problems with the meth staying in the system.

 

That makes no sense. So are you saying drag racers that spray th IC with NOS or CO2 see no power gains from freezing temps? Come on now.










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I dont know of any top drag racers that spray the intercooler ?????

Personally i would stick the n20 in the intake and not on the intercooler.

You cant re write the laws of physics ( as lots of people think they can ) intercoolers are designed to run warm in order to be efficent. IF you cool the air before the intercooler lots it will become a inter heater. Check out pro methanol cars or top fuel cars !

If you want to play then stick it pre turbo and ditch the intercooler !!!!!

Scott