JFoster

So water / meth injection seems to be a pretty hot topic these days. Just wondering if anyone on here is using it?

I am running 10psi for now but once the built motor is ready I plan to hit the stocker with 15psi , just to see how long I can make it last etc.

My plan is to wire up a BC to a switch on my shift **** so that it only runs 10psi until I press the button, then bumps to 15. Seems like rather than running a EMS that will control the meth I could just attach it to that swith and it would only spray above 10psi...

The kits look like a pretty easy DIY thing to me




Peoples main complaints seem to be that they don't spray an even mix to each cylinder .... but I think in a DIY application I would want to drill / tap an IM for another set of injectors, use a small set of injectors like stockers, and basically just a tank with an inline pump wired to my toggle switch ....

Thoughts? Experiences?

Anubis_4_99

it works perfectly, spray before the TB and it'll mix fine

------- search before posting, we've had 5 topics on this in the last couple months

FooK

I basemapped a car running meth injection once. 30psi on a d16y5 with forged rods and pistons, ran an 11.3 with no LSD and has trapped up to 130mph. Ran high 11's with no intercooler.

Tom-Guy

Yes, and as usual people's main complaints aren't the problem at hand. If you aren't getting an even mix of water to each cylinder, you aren't getting an even distribution of air to each cylinder. I mean to say you *never* get an even mix of air to each cyl. Why are they bitching? I don't know, either...

The problem is 99.7% of water injection kits either supply a fixed rate of water, or ramp things up based on boost pressure with no regard for how much water is actually needed. You need to keep water:fuel ratio precise (since we tune fuel to match the amount of air entering the engine, this keeps water/power ratio predictable) and then tweak individual injector fuel trims to get everything to match up.

Or that's the idea, anyway.

bumblezc

I think this was the most understandable reply by JD on this topic I have ever read! And he couldn't be more right. I was going to do it until I read JD's mind boogling post On it before and decided I wasn't up to the task on my DD

Tom-Guy

Do I really read like Noam Choamsky speaks?

JFoster

After reading this https://www.homemadeturbo.com/forum/...?topic=48057.0 .... yeah kinda ... maybe, IDK ... definately more thought than I was planning on putting into this.

So basically I was wanting it to be simple, like a shot of nitrous ... does it have to be so precise? I mean if your using it to reach for 600+whp on pump then I see how it needs to be controlled perfectly because you're walking the line , but in a lesser aplication such as a ~250whp LSt could the "boost cooler" set up or a DIY clone be used effectively to reach 300whp on weekends

Tom-Guy

You can reach 300 whp on an LS without any of the water injection nonsense.

JFoster

Oh definately, I mean I know alot of tuners can pull 300whp pretty regularly from the LS but I am just begining to tune ... so right now I am only tuning AFR and I am kinda apprehensive about tuning timing to make decent power...

I figure most tuners can reach 230-250 with some relatively mild timing tuning so I should be capable of that once I get a little more confident in my tuning ... the injection just looks like an easy way to tune more agressively and see higher HP #s without so much risk of detonation.

Tom-Guy

LS is very detonation resistant, you can do 300 yourself. Your first tune should be at least as reliable as paying JDogg $600.