Can I just slap it on?
 

I have a water/meth injection kit. It was used slightly. It has two different nozzles. I've been reading around a bit + I would like one nozzle pre-turbo, then the other either in the intercooler (FMIC) or in the TB. I haven't decided yet.


But I was wondering if I could just slap it on + have my car be 'safe' without needing to tune it.


Here's what I have so far -
1991 FC
S5 jspec turbo motor
corksport 80mm downpipe + test pipe
Dual apexi N1 exhaust
apexi cone intake
custom TID (it's about a foot long pipe)
corksport front mount intercooler kit

I think those are all the power mods. I do have an afr gauge, it's reading all the way rich at WOT. So adding straight water injected would just make it more rich, correct? Or would the cooling effect of the water make it run more lean + then I blow up my motor?

Sorry for the newb question. Thanks in advance. I plan on getting an rtek chip soon to control fuel.

Oh, I tried to find the injector size, but there's nothing stamped on them. There was a third injector that says M5 on it + holes in the other two injectors look the same to the naked eye.

Your really need to read through the stickys, your questions are answered there. In short, water is only good for reducing knock values and that maybe all you need/want. There is a sticky for injector sizing based on power levels.

IIRC, at 150 psi the M5 is rated at something like 380 CC/min. What does the pump in your kit indicate the rated working PSI is?

It's a devil's own stage 1 kit.

Their website says adjustable from 150-250 PSI.