Water injection

[Northboundtrain]

Has anyone tried or heard of water injection for the VW IDIs?  I was talking to a mechanic buddy today who suggested I try it in my pickup for better fuel economy.  The engine is a 1.6 n/a.  If I were to try it, I have no idea how the system would be built.

[hillfolk'r]

i use an old carb jet+ a washer bottle,just put mine in intake,between filter+ turbo,,its butch,but i notice a 100 f temp difference,,,and power too,,if immaintaingup a hill,,and i activate it,,i have to let off throttle,,that tells me it works,,and i use blue washer fluid,,after turbo is better,but you need to = the psi in the tank with turbo boost,for a washer pump to work,,so mines pretty backwoods,,but its better than none

[jtanguay]

theres some guy on ebay selling some kits sometimes.   Basically consists of a pump and an injector nozzle.  I'm not sure the best place to put the injector, but I'm guessing after the compressor is best (please correct me if I'm wrong).  A good 5 litres of water should last you around a month or more.


Now the fact that you have an N/A... well um...  Just mist that water in!  But I don't know if it will help much.   The water mist is better used on gasoline engines to reduce the risk of detonation.   On a diesel its good to reduce EGT's, therefore increasing the amount of fueling without running the risk of blowing the motor.   So yea you'll see some extra power, but not nearly as much as on a turbo diesel.

btw, I heard something about the fact that water cannot be compressed, and that adding too much water might wreck the engine components.

[lord_verminaard]

I would probably do LPG before I did water, especially on a N/A.

More power and better economy.  

Brendan
84 Scirocco 8v
00 Camaro L36 M49

[JimK]

Has anyone tried or heard of water injection for the VW IDIs?  I was talking to a mechanic buddy today who suggested I try it in my pickup for better fuel economy.  The engine is a 1.6 n/a.  If I were to try it, I have no idea how the system would be built.

I know that water,alcohol injection is used on cummins diesel in some hot rod dodges and they make a lot of power and reduced egts. Snowinjection or something like that is what most use. Propane is a good way to lift a head gasket.  Or that is what I have been told  JimK

[fspGTD]

I was reading through the old threads and remembered this one being a really great thread discussing water and water/alcohol injection on our motors:
http://www.vwdiesel.net/phpBB/viewtopic.php?t=515

Water injection, especially liquid injected close to the intake manifold, seems like an area ripe for further testing.