Yes normal 93 octane

Amazingly it was 100% knock free - in fact less knock than a stock car with 21 psi - very amazing unit with incredible atomization and distribution of the mist

 

I would suggest to any one who is serious to upgrade to a aquamist kit should conisder seriously the kits which are fuel injector duty cylce based

The difference is dramatic

The mapping in the ecu is so much more rational and linear with the injector duty cycle based trigger on the FIA2 (fuel injection amplifier) modulation through the high flow valve.

Basically, this set up is more akin to a precise electric fuel injection with very fine precision control over the alcohol injection

Typical kits I have seen to date such as snow and cooling mist are like taking a garden hose and dumping massive quantities of methanol into your intake - very crude in comparision

The biggest advantage to the injector duty cycle based set up is on cars with stock turbos that have a wide variation in boost over the power band - (e.g. the almost 7 - 8 psi drop in boost on the car that is the subject of this thread) Crude MAP based systems with controlers that modulate the pump duty cycle based upon boost levels result in bizzare looking fuel maps that can be super dangerous if the system fails. Of course this is less of a issue on cars with larger turbos which run a more constant boost level - however, any car will run smoother and have a better "feel" with a very fine and precise alcohol control which results from the combination of the high speed valve and injector duty cycle reference.

Al

 

Does the "progressive" nature of this system allow for more precise control of alky injection at low boost levels? I guess what I want to know is if this system used with a small enough jet can initiate at lower bost levels w/o bogging the engine, so as to aid in turbospoolup, like at 10 PSI of boost?

 

The trigger is a certain injector duty cycke


The high speed switch is accurate enough to keep a precise fine control of alcohol based upon the fuel injector duty cycle

I see no reason why you can not have the system injecting at low boost levels as it will be injecting only a small amount

Al

 

That is one of the best features of this kit. You can have it turn on at a low duty cycle and start spraying at only a few PSI without bogging the motor at all. The kit can be triggered to turn on starting at 25% IDC. This lets you run a really aggressive tune to aid in spoolup without getting any knock. You could even trigger the kit with a boost sensor signal and have it turn on at a set amount of boost and it will still decide how much meth to spray based on IDC.

 

Al would your shop be capable of installing the kit now that you're a dealer? Please PM me total cost with kit purchase, installation, and tune - this kit, thought $$, seems more cost effective for someone with a stock turbo than going with a larger turbo or cams. . .correct me if I'm wrong here, but it looks like gains are nearly 50whp?

 

Al- do you have any experience tuning a Hydra with the Hydramist? (made by aquamist)

 

Don't forget this guy has cams and a green. Therefore his gains are probably larger then what you would see with a stock turbo.

 

how does it know your duty cycle if it doesn't know what injectors you have?

 

duty cycle is calculated using injector pulse width, you dont need to know the size of your injectors to get duty cycle.

 

isnt pulse width calculated based on things like fuel pressure and max flow of the injectors?

 

no. pulse width is strictly the time the ECU sends a "on" signal to when it stops that "on" signal. fuel pressure and max flow of the injectors only effects how much fuel gets delivered during that pulse width.

 

i know.. but the ECU determines the pulse width based on how much fuel the motor needs.. and THATS volume is based on pressure and size.

and just because my injector stays open 15ms per stroke.. you can say how hard its working (duty cycle)?

is there a standard?

15ms = 70% duty cycle no matter what engine, size injector, fuel pressure, etc?

 

I can attest that Aquamist products are top-notch and the only true progressive system on the market for years.

I remember that I used Aquamist's FiA2 and HSV probably about 3-4 years ago to build my own custom water/meth injection system for my Eclipse. Since the FiA2 uses the injector duty cycle to match the injection, it is truly a progressive system that works perfectly and makes it very easy to tune.

You can have your injection start at low boost and not worry about a transition to the huge amount of injection that is about to come, like in other kits. The Aquamist unit will match your injector flow to always have an exact percentage of injection that you want. For example, you can have 20% meth injection throughout your whole RPM range...makes it pretty easy for tuning, as you can imagine. Other systems aren't really progressive like this, so early on you may have a butt-load of meth compared to fuel, which tapers off to a tiny amount, where you may need it most.

I'm sure Aquamist has come up with great new features since I built my custom kit years ago, but anyone who truly wants the best in meth/water injection and true progressive injection, Aquamist is the ONLY way to go.


Eric

 

ah.. technically there is a standard..

since each stroke is only so long at a given RPM.. you calculate the duty cycle based on the % of time the injector is open(pulsewidth)

good to know.

BTW.. the formula is RPM * Pulsewidth / 1200 = IDC