Water Injection

[Tomson]

Has anyone ever tried water injection (Aquamist or simular) as a way of increasing power.

Pros and/or cons ?

Seems a reasonably cheap way of keeping temperature low...

Tom

[Julesm]

Not tried it yet but have been looking into it (I have my eye on a kit!). There are quite a few brands out there offering some very tempting kits at reasonable prices. A friend of mine is currently fitting one to his car, so I will wait and see what improvements it makes. His car isn't an Audi, but it will still be interesting to see what sort of gains the water injection will make.

[JohnW]

Tomson,

Guy has an aquamist kit fitted to his supercharged VR. Might be worth giving him a shout on the ccgb board to see what he has to say about it.
I think once it is set up it works quite well, but with a turbo'd RS4 I would have thought bigger intercoolers would be a better option...

Cheers,
John.

[bjacks]

JohnRS4 has a kit fitted by QST IIRC

He'll be your best bet.

Cheers

Ben

[BRETTCOLLINS]

this is a link that i have found on water injection

http://www.aquamist.co.uk/rescr/rescr.html

thinking of fitting to my S4

[Nige_RS4]

Ask over on the audiworld forum - there are a few S4 owners over in the states with some experience of the aquamist system.

[Andiroo]

Hi guys, discussed here http://www.rs246.com/index.php?name=PNp ... highlight=, but I only used it as direct port and not on the I/C's. It worked very well indeed

Andiroo.

[BRETTCOLLINS]

Dialynx offer a water injection kit for audi's.
can been fitted same day. (couple of hours)

Anyone used Dialynx for work before?

[john_banks]

With adequate intercooling, water injection usually works best post-intercooler as the benefits are realised in-cylinder from detonation suppression.

If the ECU has pulled timing because of detonation, it may be able to advance the ignition timing again and gain more power and torque.

It really gains power though when the base ignition maps are advanced to suit the smoother cylinder pressure profile, and also the fuel dumping is reduced as you can use the water rather than fuel for cooling. However, if you then depend on it, you need a water flow sensor (which Aquamist can provide) to say drop the boost if the water fails as otherwise you could lose an engine. I found that you gain rather more with ever increasing concentrations of methanol injected instead of water, although not everyone else has found this. An easier method for me was methanol in the fuel tank, but that is frought with other considerations but can work astonishingly well, with 40 BHP gain in power. In the end I just got an even bigger turbo to cut hassle.

-----------------
Impreza, 2.5 turbo, 440 BHP, 400 lbft, 0-60 3.9 (wet), 0-100 8.7, 0-125 12.1

[jeffw]

Wow...John Banks from Scoobynet "Sluming" it on rs246.com.....whatever next. You after a fast car then John....

[PhilT]

Nice write up John. Had a quick look at Scoobynet..... Welcome to RS246 John, looks like you bring a wealth of knowledge.

Got to admit "0-60 3.9 (wet), 0-100 8.7, 0-125 12.1" is impresive, but is it appropriate for a sig?

[john_banks]

Hi Jeff

Hi PhilT

----------------------
Rice boy considering under-rated refined Teutonic saloon for wife

[Julesm]

......Stick with your other signature, it's much more impressive!!

Does that mean you are on the lookout for an S4 or A6 2.7T?

[john_banks]

Considering one, or (cough) a late 330d remapped, heard 410 lbft was possible, not as silly as it might seem especially as the wife will be doing some mileage, although RWD and Scottish weather don't always mix. Anyway, you don't want a newb polluting a technical thread with chit chat

[jeffw]

John, you chat away ......