Just wondering if anyone has gone this route? I just got a FJO wideband kit and was on there site as well as talked to there tech guy about it. Seems nice and they have a new version coming out next month.??

 

http://www.fjoracing.com/products/waterinjection/

FJO Racing Products releases it’s standalone Water Injection System. This product is styled after the very popular water injection accessory of FJO 341B System.

The use of water and methanol to control detonation in high compression or boosted engines is a time proven technology. This advanced product is engineered to deliver a fine mist that can be precisely metered based on MAP PSI, TPS, RPM, and Fuel injector duty-cycle. With the use of 1 and 2 dimensional maps, it is possible to program the controller to deliver exactly the correct amount of spray without the risk of flooding the combustion chamber. Our unique nozzle-solenoid design allows for instant control and delivers a mist so fine that complete evaporation is almost instantaneous. This results in a more effective use of the spray without risk of condensation in the intake. The FJO Water Injection system is constructed using materials which are engineered for and unaffected by water and methanol. To avoid compromising the performance of the system, materials such as brass, raw or anodized aluminum, raw or plated steel, natural rubber, and silicone should not be used as they are not suitable for use with water and/or methanol.

Built to the same rugged specifications as all of FJO's products, this system sets a new standard in water injection.

Features

Spray volume based on MAP PSI, TPS, RPM, and Fuel injector duty-cycle
Integrated 48 PSI MAP sensor
System is fully methanol rated
Nozzle-solenoid delivers ultra-fine mist achieving instantaneous evaporation with precise metering (see video)
High pressure 100% duty-cycle pump
Easy to use graphic set-up menus using PC
Closed loop operation with optional pressure transducer
System is expandable
Benefits

Free updates/upgrades to software and controller firmware for the life of the product
User installable firmware update using PC
Built for the racing environment to withstand heat, vibration, dirt and water
Free direct technical support

 

I am planning on putting one of these on next spring/summer. i need to break in my motor first.

 

CELL BY CELL TUNING (CBCT)

it is time to move on from the progressive systems that date back to Home Depot DIY...

they work very well for dyno pulls and drag racing. not perfect but very well, but as we look around the technical landscape we don't see any one pound cell phones other than on TV-land.

note very carefully the above FJO AI window...

this is, at minimum, what we really need to tune our magnificent turbo'd rotaries.

load/boost and rpm are the X Y factors...

not just load/boost like most progressive systems because...

1. if you make target boost at 4500 rpm you use X amount of fuel (expressed as Ms of injector ontime). do you use the same amount of fuel at peak torque at say 6600? of course not. the engine is spinning faster at a better VE so it will use more fuel. but the progressive system will deliver the same amount of AI injectant because the progressive system only keys off boost which is the same at 6600 and 8000 as at 4500.

2. after peak torque it is usual to use less fuel as the time becomes less between combustion events. here again, the progressive system only sees boost and delivers the same amount injectant at 4500-6600-8000.

now take a look at the above matrix...

note that at peak torque and rpm the tune is 100% of deliverability. just as it should be. the FJO setup employs High Speed Solenoids/valves and deliverability is expressed/tuned in terms of % ability to deliver. each HSV can deliver 800 CC/Min. (500 hp+ rotaries will want to run two).

note at constant boost how the delivery rises toward peak torque and shades lower after peak torque! you merely input your desired value and tune CBC. 10,000 rpm is set at 85% which is in the ballpark.

you can't do this w a progressive system.

to fully appreciate CBC take a look at the 15 psi line....

say you hit 15 psi at 4400... note delivery is 58%. let's assume your peak torque is at 6640. AI delivery is 80%. now after peak torque the VE (volumetric efficiency) tails off and combustion intervals decrease to a point where you need less fuel and we see the setting at 68%...

AI delivery ramps down a bit along w your base fuel setting.

WOW.

of course the X and Y lines are user configurable.... maybe 8000 for 10,000 etc.

while it might seem that the above matrix is smaller (16 X 16) in relation to your Power FC (20 X 20) keep in mind that AI only employs on the boosted side of your map so the FJO grid actually has a larger number of individually tuned cells.

another nice CBCT feature is no longer will you have to do a bit of guessing as to exactly when and how much AI enters the map and therefore where do you start removing base fuel.

welcome to the 21st century

howard coleman

 

If everyone would just get a capable ECU with FULLY mappable , user defined outputs , they wouldnt have to be hanging "black boxes" everywhere ! and the cost would be less too.

 

the January 08 (how do they date magazines anyway...) Turbo magazine that just hit my mailbox today has a 5 page writeup on the 2nd gen FJO AI system.

interestingly, along the lines of Marcel's comment (above) FJO does include a sophisticated 4 bar MAP sensor and boost control thus reducing the need for additional black boxes.

the system interfaces w both the boost controller and the FJO wideband and thus can provide "safeguard" options relating to the boost wastegate as far as AFRs and AI system pressure etc.

there is one mistatement not relating to FJO's systems...

"since methanol has a has a lower detonation point than gasoline, going higher than 50% (meth) can actually increase detonation."

not so. gasoline autoignition is 660F. alcohol is 858F.

advantage alcohol.

howard coleman

 

This is what I will be using. (FJO kit.) Hopefully my winter project. I posted this info before stating how programable this is and how all AI's should be developed this way.

How I will do this is not use their controller but use my generic DC output on my haltech e8 to drive a driver box provided by FJO to control the solenoid to control the injection. (Less boxes)

Only down side is safegaurd will have to be implement by myself somehow.

Pump
Driver
Solenoid
Install kit
Filter.

It is a little on the expensive side.