hiya guys i was just wondering if a piggyback ecu is required for use on aquamist. I am thinking of buying aquamist befor i go get my live map done a perfect touch and wondering if it can be run off standered ecu?

thats if it works off the ecu lol

Nope, the standard 1s system ( which I have ) uses a simple pressure switch to activate the aquamist <img src="/forum/images/graemlins/smile.gif" alt="" />

very simple & of course upgradeable to the DDS3 ( which looks ooh so trick )

cheers

Taz <img src="/forum/images/graemlins/smile.gif" alt="" />

I've nearly finished installing my 1S and DDS3. But i have one question. What has everyone connect the purple wire on the loom to? It says to connect it to the ignition switch but i don't want to route the cable back into the cabin. Is there anything else i can tap into in the engine bay?

wat are the actual advantages of aquamist?

Is is it more of a safety measure?

Kenno - if you need a switched +12v then I cable that goes behind the battery.

Large connector and the cable is orange (quite thick). I have used this for my chargecooler pump

Chris

Thanks Nobby <img src="/forum/images/graemlins/smile.gif" alt="" />

Benefits of Aquamist is that it will reduce your charge temps, and help reduce the risk of det. With a unichip you can get it to run 2 different ignition maps.

A unichip provides the benefit of controlling the amount of water based on the Unichip map - but that requires the Aquamist 2C system. That enables you to have a multidimensional map to control of the amount of water injected.
The 2c system is a lot more expensive, and the 1s system can be upgraded to the 2c system if your budget doesn't allow you to buy it initially. The 2D system is the same as the 2C except it is standalone and controls the aquamist based on injector duty and a corresponding map associated with that. That makes it more expensive again.

BTW you also need an extra driver for your unichip to drive the 2c system <img src="/forum/images/graemlins/grin.gif" alt="" />


The benefit of the 2c/2d systems is that the amount of water you inject is not arbitrary but can be controlled, and is not activated at an arbitrary point either. It also means you cannot maximise the benefit of the injection as the right amount of water at 6500rpm is going to be way too much for the right amount of water at 4500rpm for instance.

If you are wanting to run more ignition advance then normally you would put your nozzle adjacent to the output of your intercooler, and if you want more cooling put the nozzle as close to the throttle body as possible.

BTW aquamist can also be beneficial for use with various types of superchargers (roots type) as it creates a better seal inside the charger itself - producing a little more boost pressure.

Most totally irrelevant post of the year? <img src="/forum/images/graemlins/laugh.gif" alt="" />
Chris

No, you didnt mention about PSA belt tensioners in this thread

When I was getting my car remapped, it was quite cold and Rob said the 0.7mm jet I was using was quenching the spark.

Now if it was 30 degrees outside i guess the charge temps would be much higher and the 0.7mm jet would be fine and the water injection would do it's job.

My question is, would it be better to wait for the summer and try getting the car mapped on a hot day and when the winter comes round just disengage the Aquamist?

What jet sizes is everyone else using?

Ken, I'm very sorry to hear about your car troubles, bad news <img src="/forum/images/graemlins/frown.gif" alt="" />, I hope you get it sorted.

In answer to your questions I lifted this information from the Aquamist web-site FAQs when I first had mine fitted:


So ERL Aquamist recommend it for summer or winter use, however they are trying to sell more systems <img src="/forum/images/graemlins/grin.gif" alt="" />

The jet size would depend upon the system you are running; I have the System 2d and I use a single 1.0 mm jet, this is due to the accurate metered water injection offered by the 2d system, synchronised and controlled by the fuel injection pulses (and duty cycle).

Aquamist provide a method for calculating jet size dependent upon the amount of fuel injected.

The following are the calculations taken from Aquamist data and I adapted them for the 20VT:


So from the above a suitable jet can be selected depending upon the injector duty cycle.

Ken, I started with a 0.6mm jet, then a 0.7mm jet, now a 1mm jet, but this was for an aggressively mapped ignition map, I'd imagine it may well be too much for a standard ignition map.

Most Coupes run between 0.6/0.7mm I believe?

Joe

Thanks for the info guys. <img src="/forum/images/graemlins/smile.gif" alt="" />

Whittler - do you have a formulae to calculate the volume of fuel injected? I'm wondering how much this will change with a 3.8bar reg?

Doc - I suspect in the summer i may well have to use the 0.7mm jet, i may even be tempted to upgrade to the 2C/D by then.