Tomorrow I will be installing a stage 2 w/meth with variable controller.
With my mods where do I start with jets,mixtures,what boost to start injecting at what psi and where to bring it full on?
I need cooler egts while the drag is in kill mode And would love the extra kick in the pants.
Ive searched and read many posts about the above but would like suggestions or input on a good starting point for the mods I have.

Thanks Guys, Mooseman

 

Install both of the large nozzles (625ml?). Set pump pressure to max and you should be able to start injecting around 18-20psi and set the full on at somewhere around 5 psi below max boost. Id recommend just running the winter formula (-20) washer fluid, been told between 20%-40% methanol and easy to get. Costs about $1.50 a gal.

 

I'm set up same as Rockjeep. It just requires some time to adjust the way you want it. The "start" and "full" wheels are not marked well and so small they are hard to set exactly.
I just kept dialing down my start wheel, a little at a time till I got minor quenching....than bumped it up a little.
My next test session I'm going to play with lowering the "full" setting. Have not played with this and hopefully it is the key to holding down EGT's. Right now, at WOT, I still climb to a pegged Pyro...it just takes longer...8 or 9 sec instead of 4 or 5 without injection.
Be gentle with your pump when setting. Very easy to turn it up too hard and strip the high end stop. Been told this does no harm but it does make future adjusting (finding the max) difficult.

Good luck

RJ

 

Mine starts at 20 and gives full flow at 30 psi. I was not able to turn the pump up all the way, it will stumble with full flow. I just cranked it up a turn at a time from the stock setting until it would stumble, then backed down 1/2 turn.

 

How do you tell when your quenching? Does it stumble,die or do you watch gauges and smoke?

Thanks Mooseman

 

You'll know! It will stumble and sneeze (best way to describe it, sounds like raw fuel burning in the exhaust, kinda like a backfire only not so loud).

 

I wouldn't recommend setting the pump any higher than 250 psi. At 300 psi a 625 nozzle will flow 1 gallon in about 50 seconds and you risk bursting the supply lines.

I'm running the stage 3 controller, which I highly recommend over the stage 2, but when I was running the stage 2, I ran one 625 jet with the pump at 250 psi. Started it in at 20 lbs boost with max at 30-32 lbs. Don't bother trying straight water with that setup, as it will put out the flame. Washer fluid works well with it though. I think another 625 jet would probably be too much at 250 psi pump pressure, but adding a 350 might work. I've seen two 625s work well at 150 psi pump pressure on mid 400 hp trucks, though.

 

Thanks for the info guys.
I'm starting to realize its a trial and error type deal here. Its definitely not a plug and play system.
With the replies I now have some good initial start up ideas.

Thanks, Mooseman

 

FWIW - I'm running 2 625 nozzles with pump on full. (I thought full was 250 psi?) No quenching above 18 psi boost.

It takes me 6-7 passes at the drag strip to get a low washer fluid light. Say it's on for 10-11 sec a pass...that's 60 - 70 sec for 1 gallon with 2 nozzles.

I have not checked my pump in about a yr....maybe it has vibrated to a lower setting...but does not seem probable.

These #'s seem to be about 1/2 the flow you mentioned??

RJ

 

The pressure across the nozzle is lower when the engine is making boost, so flow is going to be lower in the real world.

 

How are you all measureing pump psi?

Mooseman

 

Refridgeration guages. My pump goes to 300 psi and beyond.

 

Mooseman
How's it working? Got an update for us?

RJ

 

I was talking to a guy at the dragstrip about a month ago ( he built my buddies motor in his 02 Trans-Am pulls a 10.6 in the quarter ) but anywhoo..........he was saying that the water/meth setup was corrosive?!?!?! I had never heard that before and wasn't sure if he was full of crap or not? He said you can for sure make some power with the setup but he didn't like it because it was somewhat corrosive. I just nodded my head and went along with it. Any of you guys ever heard anything like that??

 

If you do not allow 5 min+/- running time to "clean burn" the cylinders, after every time you inject, there WILL be problems.

I have done 4 oil analysis tests since installing my Snow's kit and there is no evidence of Alcohol (meth) in the oil....and Water in my oil has always read 0%!

Jim Fulmer has run Snow's kit as long as anyone...and has torn down his engine. Had no signs of oxidation/rust/corrosion! He is the one that taught me the 5 min rule.

RJ