Is it Necessary to install water injection for me?

[snailpower]

My ride is L15A Honda fit 1.5CC with turbo and extra fuel injector.

max boost 0.55 bar.

Is it necessary to have water injection?
I had AEM FIC controlled my fuel around 12.7 : 1
is enough to cool right?

my max HP should is around 130 to 140hp

alot of friends said not necessary.  HP too small

what yr view?

[NS]

If you don't have any knock or intake air temp control issues then water/methanol may not be very beneficial to you.  If this were my setup I'd get rid of the 5th injector, runner larger than stock injectors, crank up the boost, and run water/methanol.  Since you already have the 5th injector and aren't running high boost you'll probably be fine without it.

[snailpower]

If you don't have any knock or intake air temp control issues then water/methanol may not be very beneficial to you.  If this were my setup I'd get rid of the 5th injector, runner larger than stock injectors, crank up the boost, and run water/methanol.  Since you already have the 5th injector and aren't running high boost you'll probably be fine without it.

thanks. what if i want to install? will it reduce power as my power is too small. ( instead of cool down, it kill the fire)

1) if install water injection, my air fuel remain or give less fuel as since i got help from water injection.
( from website, heard that abit learn go faster then rich. true or false? if true, then i try abit learn with help of water injection)

2) if install water injection and i put 100% water, what will happen to my car?
if 60% of water instead 50/50, is it still better?

[NS]

I could create a misfire condition but it all depends on how you tune the system.  If you introduce the water/methanol too soon and there isn't enough combustion heat to support all the water vapor then yes you could get a misfire.

Methanol is a fuel so if you inject a water/methanol mix your AFR will decrease and you will go richer since you're adding more fuel.  Because you're adding in a secondary fuel this normally allows you to go slightly leaner on your primary fuel which can and will make more power. 

Straight water is obviously not a fuel but it does absorb a lot of heat energy so it works well as an "intercooler" and helps reduce your intake air temps.  Because it doesn't burn, water actually increases your detonation threshold by slowing and controlling the combustion rate.  This effectively increases your knock resistance or octane level.  In my experience, injecting water alone has very little affect on your AFR. 

We recommend 50/50 water/methanol because it's easy to make and it works well giving a good compromise between the benefits each fluid provides.