Supercharger Detonation Aquamist

mertdastan · #1 (**permalink**) 12-11-2001, 03:23 PM

Hi,
I have a Euro version 3,2 supercharged M3. I started to spray aquamist. Metanol and water are mixed 50/50.
Is there anyone who increased boost after the aquamist installation?
How did you know you were on the rich side and there wouldn't be a problem due to lean mixture?

Best regards

MERT DASTAN

psk145 · #2 (**permalink**) 12-11-2001, 03:47 PM

you would just change the pulley diameter to increase boost. Ask paul e. He has the water innjection kit on his car, and he has just recently increased his boost as well.

E36M3 · #3 (**permalink**) 12-11-2001, 05:24 PM

Charles,

You ever thought about doing this to our cars? drawbacks? hype? advantages?

psk145 · #4 (**permalink**) 12-12-2001, 11:37 AM

BJ:
Heard nothing but positives on the system. The only drawback i can see right now is the 1000+ price tag which I cant afford now.

and the wife

but you my friend, I say give it a try!!!

fourfa · #5 (**permalink**) 12-12-2001, 11:49 AM

$1000+? Look at the price tags at www.aquamist.co.uk, they're a lot lower than AA. you can compare the details with AA to see what they give you.

Hellred · #6 (**permalink**) 12-12-2001, 12:05 PM

The water injection principle has been around for a very long time. Apparently they used this system in WWII planes, to prevent engine detonation during flight.
The common misconception is that the alcohol has some mysterious power. The only reason it's present is to prevent freezing.

I personally called ERT about their kit, and they said that I could potentially up my boost from 6 to 7.5 psi.. No problem.

psk145 · #7 (**permalink**) 12-12-2001, 12:15 PM

Quote:

Originally posted by fourfa
$1000+? Look at the price tags at www.aquamist.co.uk, they're a lot lower than AA. you can compare the details with AA to see what they give you.

Oh I know fourfa, you've told me about that before. I was just figuring what paul e had said came extra with the AA kit. Yeah, I figure its probably cheap to make my own resevoir and stuff, but for budgeting, its a safe number to use. So maybe directly from aquamist,labor, and all the other bits and pieces, a grand is still pretty close I think

Hellred · #8 (**permalink**) 12-12-2001, 12:28 PM

Psk,
The fellahs at ERT suggest making the kit in the Windshield Washer fluid container. This way when it runs low, you have a light that comes on, so that you never run dry, and kill the engine.
If you need to clean the windshied, you can still use the water...

psk145 · #9 (**permalink**) 12-12-2001, 12:43 PM

Quote:

Originally posted by Hellred
Psk,
The fellahs at ERT suggest making the kit in the Windshield Washer fluid container. This way when it runs low, you have a light that comes on, so that you never run dry, and kill the engine.
If you need to clean the windshied, you can still use the water...

hey, thats an excellent idea!!! I didnt think about that! I always thought the washer fluid resevoir could only be used for the injection. Hmm, too bad I got my xmas stuff already, but my b-day is coming in february

fourfa · #10 (**permalink**) 12-12-2001, 12:47 PM

I really think it's more like $500 with parts. labor is DIY because it's very simple. about as hard as headlights maybe.

the window tank is 2.5l, which would be fine if you check it every time you get gas.

psk145 · #11 (**permalink**) 12-12-2001, 12:56 PM

which kit is it that AA sells? 1S or 2S?

self install huh? Hmm, might have to research this some more. This would get injected after the aftercooler right?

fourfa · #12 (**permalink**) 12-12-2001, 01:14 PM

I'll check later, but I thought the AA kit was the bare-bones 1S kit.

you probably would want to inject after the aftercooler, yes, to keep the vanes dry. liquid water on the air side might impede heat conduction. however it might promote better mixing too. worth an experiment, actually.

BMWGuy206 · #13 (**permalink**) 12-12-2001, 01:47 PM

I dont know what aquamist supplies with their kit but Active Autowerke sends you the pump which includes all the necessary brackes, electrical parts, and wiring in a box. Active Autowerke also makes and supplies you the hoses and all wiring and switching pre assembled so the installer doesnt have to waste a lot of time. I guess the labor involved in making the hoses, tank mounting, and wiring harness is included in the price.

I would never use the windshield washer tank as the water supply for the water injection system. The tank is way to small plus you would always have to use distilled water. If hard water was poured in, the nozzle would get plugged up. I saw an ERT SC M3 with an water injection kit which used the windshield washer tank for water injection supply. The supply line runs on top of the radiator and to the pump. Not really a nice setup to since the radiator will just heat up the water thats being supplied to the pump. I dont think I want water heated up going misting into the intake manifold.

Supercharged engines only use a stage 1 system while the turbocharged engine pushing more than 12psi use the stage 2 system which has 2 nozzles.

Matthew C Smith · #14 (**permalink**) 12-12-2001, 02:01 PM

Keep in mind that the air coming into the engine can only hold so much water. So, if it's humid outside, water injection isn't going to do much good.

BMWGuy206 · #15 (**permalink**) 12-12-2001, 02:09 PM

I dont know about that but AA has one installed on their demo car and it helped alot when outside temps. where like 90+F degrees and 100% humidity. The nozzle emits a very fine mist and by the time the mist makes it into the runners, its evaporated and air intake temps has dropped like -70F degrees give or take.

It may help only on forced induction vehicles where air intake temps can go over 200F degrees.