water/meth etc

[tomp]

I reckon that a professional instal would take more than a couple of hours by the time everything is all fitted and plumbed in, then it needs to be setup, preferably on a rolling road.

[danny_p]

setup on the rollers ORLY ?

for a road setup your best off takeing the reasonable gains offer by lower intake temps and spark not been pulled by the ecu, no rolling road reqd. unless you want to be silly

the moment you start mapping around it you have to have it, you really want multipoint then thats controlled by the ecu, so you can work the meth content into your fueling.   water injection has been around for ages as well as dopeing fuels with meth.

running mapped meth/water  injection on the audi thats ecu controlled  but that engine chould very easaly grenade with the power its pushing

[travisreeve]

Im guna use the hand pump out of the vw split screen 

[SoundillusioN]

Im guna use the hand pump out of the vw split screen 

I bet this ain't the only thing you use it on. 

[Seanl]

Kits and install are around the £600 mark iirc

[tomp]

Surely its a bit more scientific setting up on a rolling road?

My car has adjustable boost and my water injection only runs at maximum boost to prevent detonation at these levels.

[DOA]

If you can run a dedicated map for using water or methanol injection as well as a non activated map then yes, theres every reason to rolling road the car to get the best from the system. If you are restricted to a single map you would have to be wary not to take the new map outside of the adaptation range of the ECU when not running the water/meth injection for fear of running into severe detonation. Even keeping it on a stock map you will have one crap running car for a while after running the injection while the ECU adapts back to normal (assuming your ECU is intelligent enough to adapt of course!) and it wont just give you its best straight away for the same reason.

One other option is to inject onto the intercooler if using an air to air unit as that still lets you take advantage of the fact that water will absorb the heat faster than air reducing the slight tendancy of the intercooler to act as a thermal sink in times of high cooling demand.

One thing to be wary of if building your own injection system is that it doesnt leak water into the inlet when the engine is stopped and to make sure you dont use too large a jet as otherwise you might run into hydraulic lock if too much gets into the cylinders at any given time (unlikely but you never know lol).

[DOA]

BTW, one thing I had never really thought about with methanol/ethanol is that using it will actually make the engine run very lean due to the high oxygen content in these fuels as well as the increased air density through the cooling effect. Something to think about if your not going to swing/alter the timing to suit it and you go mental with the quantities.

[danny_p]

the extra fuel in the meth is usally used as exactly that on singel point singel map systems, hence not setting it up on the rollers.  when you get keen you take it into account  but need to accuratly meter said water meth then, hence useing injectors for it rather than spray nossels.

to get more of gain on a singel map system put the spray nossel infrount of the last air tempritue sensor or move said sensor to a location downstream of the nossel