Now is that running 24/7 w/ constant boost? Or is that driving like an old lady?



-Sayajin

 

my alky tank was set up by al at dynoflash. I have a max of 25psi of boost. My alky tank kicks in at about 15psi, and gradually sprays more until max boost....works great! If I drive hard, I'll top off the tank when I get home. If I drive slow, the alky tank will last me as long as I want it (not hard to stay below 15psi.)

 

I had ALky on my 03 and it would last about 2 tanks of gas, at least. Granted my driving is 75% highway. What most people haven't mentioned is that if you are constantly racing your car, during daily driving, what is your current max boost? I was running 25psi and that is on a daily basis. I was road tuned by Al and the car never had issues. Of course, you also get very addicted to the exhaust smell of alky!!

Either way it is one of the best best mods I did regarding adding power to the car.

 

Half and half...some grandma driving some full throttle. Now remember this is dependant on the quantity/size of injector(s) and the boost onset point. Obviously using (1) 700cc injector and (1) 300cc injector will consume a lot more methanol than would a single 400cc injector. Also the point at which the injectors are supposed to start spraying makes a difference. Having it activate at 4psi will in turn consume a lot more than activating it at ~15psi.

I was using a single ~750cc injector and it was activating around ~13psi. The tank of methanol lasted approx. a full tank of fuel.

 

How much does it cost to refill the alcohol? Al or David was saying they use denatured alchohol from Home Depot or Lowe's, but how much does it cost?

 

Humm... still seems like I havent really got a complete answer, but I DEFINETLY appreciate those who have contributed. My next question is this then,

What is the most common Alky Kit setup? One that allows you to run straight methanol AND run 50/50 mix? Also one that allows you to set the spray setting based on boost? Also what size reservoir do most people use? How about injectors and size? Thanks a lot guys. Also let me say all of these questions would be in regard to a street setup, not a track one. Thx.


- Sayajin

 

In answer to your question; generally it's dependant on boost switches. Injectors inject whatever solution you want to inject dependant on the level of boost your motor is seeing. Systems like Aquamist that retail for $500+ are gradually injecting the solution and tap into your ECU to provide signals through the MAF/MAS I believe.

My Questions to you:

-Use your stock rear windsheild washer resevoir from your 1G.

-What size injectors are you running?

-How much boost on what turbo? (*I'm guessing 93pump gas?)

-Do you want to run a single stage or dual?

-What's your goal? Cool intake temps? Or Make power/prevent knock? (very important in figuring out what solution you should inject).

 

Being truthful with you, I am not 100% sure right now as I am doint my initial research. I will definetly snag the resevoir off of my 1G. Thx for that. Also depending on how beneficial Alky injection is I would probably get started on it pretty soon in my modding process. Which means I would run 750CC Injectors on the Stock Turbo for a bit, until I got ready for a real turbo. As far as boost probably somewhere around 25psi on the stock turbo or so. Yes on 93 pump. I would really prefer a dual stage as how I think from my reading that it is a better all around setup. My main goal with the alky injeciton would be to make power and control knock.

Now I realize that obviously I would have to modify my setup as I ran more boost and bigger turbos. But I am kind of wondering about a starting point for both the stock turbo and a bigger street trim turbo as well for the future. I doubt my injectors will change seeing as how I would go 750cc from the start to keep from having to change them later. Course I mean the injectors for fuel, not alky injection. Thx a lot for the help man!


-Sayajin

 

Ok here's where it gets kind of tricky. Your aim is to inject 18-25% of solution given your circumstances of running 750cc injectors. Now in order to calculate what size injectors you would need you would somehow have to find out what kind of injector duty cycle you're seeing at around 20psi (pump gas before it actually shows signs of detonating/knock). What you do is take (750cc) fuel injectors x (4) injectors x (??) injectory duty cycle x (.20) 20% methanol of total fuel through fuel injectors.

For example, I was running 950cc injectors x (4) injectors x (70%) injectory duty cycle on top of 3rd gear WOT pull x (27% methanol injection -I used a higher percentage because I was running a higher boost level reaching 30psi) = I should use ~700cc injector.

Now if you're running a dual stage you should inject no more than ~300cc on he first stage and he rest *dependant on that calculation I showed above* for the second stage. Remember on boost pressure switches don't activate the first sprayer to turn on until atleast ~13psi and the second around ~20 -you will have to play with those figures for your individual vehicle. Remember also that if you start to bogg that means you're spraying too much at too low of a boost. The methanol doesnt have enough time to fully atomize and it's flooding your motor. Quick pointer, most companies use a shurflo 100-150psi fuel pump and on which has an allen key. Turn that key in (7) full turns so the pump is activated all the time, this lessens any chances of the system turning off for a split second while you're under WOT load, it keeps the lines pressurized nearly all the time.

Again, I have a few more tricks up my sleeve, but I wont be able to share them publicly because I wont be able to reach my computer for the next few days so if you have any questions forward them to PM. Thanks..

 

i think this is not true...
what if u turn the boost down to like15psi using manual boost controller and still leave the alky kit off?

 

Back when I was using Aquamist, I would empty the IC spray tank (1.5gal) in about 25 minutes of WOT high rpm driving.

 

Which size nozzle did u use?

 

i also have a question on this... let say im running alky injection and im tuned for it.. i run it til i ran out of the liquid... if i don't refill the tank with meth or whatever solution that im going for... would my car lean out? wouldn't this be bad? wouldn't you constantly need to keep to tank filled?

 

Yes you need to monitor the level. Tuning for meth at the certain boost/timing levels with and without having meth injected could cause SERIOUS motor damage.

 

Real simple.

Set alcohol injection system to start spraying at 22 psi, then set your boost to 20 psi and tune the car on the dyno. After you have a good tune for 20 psi and no alcohol turn up the boost to 24+ PSI. The map (even with a flash) will be tunable in the high boost levels independent of the tune at lower boost levels. Now your high boost area of the map is tuned for use with alcohol.

When you do not want to run alcohol (not sure why you would ever want to not run it.... but you asked) just turn your boost down to 20 psi. No alcohol is sprayed below 22 psi.

Ta Da!

Now, please explain to my why you would not want to run alcohol at any given time? Cheap, works great, and lets you run higher boost with more agressive timeing.

Later,

Keith