Choosing a water / meth kit

[androo007]

Hi guys,

So one item I've always wanted to run on my build is a water injection system. I've read a lot about them and really believe it could be of benefit to me.

Main reasons are for additional knock protection but mail the cooling affect on the cylinder bores. IF this even has a small potential of reducing block stress which could lead to cracks (2/3 cyl) I'm game.

For the relatively small outlay I'd like it.

I don't want it as a power adder - just a safety tool. The car will be tuned without it so I will never be reliant in it.

So what kits do you guys run? Rate them?

Progressive a bonus, display of low level etc advantageous.

Cheers

[gnzyza]

If your not mapping for it get the cheapest kit with the smallest nozzle, post intercooler.

I'll be making my own with a piston pump, so much higher pressures and better atomisation. Got most the parts just need to get round to it.

[Odin_S]

Aquamist hfs3 is the best.... the end
I thought like you at the start in the sense of using it only at an additional safety measure. However when you read more about you'll realise why not.

It's a little like buying a turbo and say, "I'm only going to drive the car off boost "

[androo007]

You're totally right..... but in this case I'm certain it'll be Judy for safety. There's too many factors that make it risky to map based on it running.

Just one pull of bad det will wreck the engine.....I'm too much of a pansy to risk it

Good luck weds BTW

[Essex2Visuvesi]

I have used the AEM one in the past

was fitted to the wife's GT4 clubman rally car. The car was tuned to take advantage of WI but not to the maximum

[C35Rob]

You're totally right..... but in this case I'm certain it'll be Judy for safety. There's too many factors that make it risky to map based on it running.

Just one pull of bad det will wreck the engine.....I'm too much of a pansy to risk it

Good luck weds BTW

you can get an AEM kit with a failsafe gauge that will limit boost if the water runs out or the pump fails, that way you can map for maximum performance, and still be safe.

however.. I think the most important thing at this stage is to get knock control running on your ECU, given the choice between a WM kit and active closed loop knock control I'd take the latter.

[androo007]

There's a few good and bad.... the link knock control has to "learn" what knock is I.e by inducing knock which is fine for a short period, but often has interference from other factors which will obviously drastically change the parameters. I did ask about this but Simon wasn't overly enteusiastic about it.

Plus too late, I bought the AEM 30-3300 kit as I was feeling sorry for myself

[mr2magic]

..the link knock control has to "learn" what knock is I.e by inducing knock which is fine for a short period...

That is how knock control works on all modern cars. The system doesn't prevent knock, it just detects it before it becomes the feared beast it is

[C35Rob]

there's kind of half truths in there, he'd have to initiate very mild knock in order to set the threshold/gain sensitivity - that's literally just a case of gradually advancing timing until a little ping is heard then backing it off again.

it's right that you can get "phantom" or false knock, frequencies picked up by the knock sensor in the same range as actual det (i.e heavy valve train noise, banging gears etc) but the link has a windowing capability where it'll only listen from X degrees before and after the point of ign for each cyl to reduce this, and also to pinpoint which cyl(s) is pinging.

even if it were to hear a false knock, the ecu would then pull timing but also then attempt to re-apply timing incrementally up to the level of the original timing map, so it's not like a phantom knock episode is going to permanently affect the map.

it may sound harsh (and please don't take this the wrong way) but if your mapper isn't enthusiastic about protecting your engine I'd take it to someone who is.


[/i]

[androo007]

Hmm interesting point - well taken Rob. I think it was more at this moment in time it wasn't perhaps the most urgent thing I needed (I had just dropped the car off with a stuffed camelt setup). He himself has the Link tools to aid mapping so maybe my phrase of turn wasn't quite right.

I've had meth kit in my head for ages and it's an itch I needed to scratch.

I'm sure by new year I'll have the knock block ordered and ready to be installed

To be honest I'm just keen to see it fecking working and not half ar$ed finished!

[Essex2Visuvesi]

I've had meth kit in my head for ages and it's an itch I needed to scratch.

How about this kit?

[androo007]

NOW you're talking.....