Lister Engine Forum

Lister Engines => Listeroid Engines => Topic started by: tyssniffen on December 22, 2019, 07:51:50 PM

Title: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: tyssniffen on December 22, 2019, 07:51:50 PM
I’m hoping to see some automatic or semi-automatic water injection systems that are working.  I’m a believer, but want something I don’t have to babysit.

Anything with gravity feed? What’s some cool DIY systems?
Title: Re: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: tyssniffen on December 27, 2019, 06:25:18 PM
I hear you saying the gravity idea wouldn't work well, but let me ask this:

on my 6/1, if I did do some sort of gravity thing, I'd set it up like an IV bag, with a flexible tube going to a metal tube that snaked down into the air intake.  Then, when the engine was up and running, I'd turn on the drip and then turn it off as I was shutting down.

The question is, would a drip/dribble that would come out of a gravity feed like that *work* ?  Or is it necessary to have a *spray*? 

Right now, I'm just dropping a teaspoon to tablespoon down the pipe every so often while hot and loaded... and that seems to work well enough. 
Title: Re: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: tyssniffen on December 30, 2019, 06:40:54 PM
Ok, thanks.    I've now had another idea, because it's stuff I have around.   I'm thinking about setting up a gallon jug to hang like an IV bag in the gen shed, and have a tube set up with the *garden drip irrigation valve*, such as these:
https://store.rainbird.com/pc10-pressure-compensating-module-barb-inlet-10-0-gph-green.html?utm_source=google&utm_medium=cpc&utm_campaign=RainBirdPLA&utm_term=&gclid=CjwKCAiA3abwBRBqEiwAKwICA04aSAm-YsEnxICI-WRWFoUb-maWMNGJiXIXA3Sh5bgiJZ9TRfbrKBoCnLoQAvD_BwE

I have all sorts, that can do from 1/2 gallon an hour to 2 gallons an hour, with a better tube at the end that can snake down into the intake. 


BUT, just to ask the question again -  a DRIP is ok?  Are you suggesting that the suction from the intake will pull the drip down into the chamber? 

And, further questions:
- what frequency do you think I should try - 1/2gph, 1gph, 2gph?

- WHERE should the drip happen? at the top of the typical inlet pipe, or down inside, close to the block?




Title: Re: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: tyssniffen on December 31, 2019, 05:27:40 PM
ok, thanks. I will report back when things are set up.
Title: Re: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: farmerjohn on January 05, 2020, 10:20:40 AM
I have found that if you place a bucket of water just below the level of the intake and run a hose from the bottom of the bucket and into the intake - the suction power of the intake will suck in just enough water on each intake stroke to provide sufficient cleaning.  Prime the hose with gravity suction first and then shove it into the intake..  I use 1/8" plastic tubing

A 20 L bucket will last for a few hours..  I do this approx once a week.. 

Its simple and allows you to walk away without worry..

The key is to have a steady / somewhat heavy load on the engine during the water injection..  I keep a constant 3kw load on mine - it works a treat..  make sure its warmed up first


John

Title: Re: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: farmerjohn on January 05, 2020, 11:57:52 AM
^^^^ That sounds like a Highly variable setup. A lot would depend for a start on the air cleaner you were running and the restriction it posed on the engine. The volume of water admitted would also vary greatly as the level of the bucket dropped.

Nice and simple if it works for you but I would suggest the results could be highly variable from one setup to the next.

these engines do not really give a shit :)

From start to finish the bucket is at most 12 inches or so in height..   

Fill the bucket - hang it from the ceiling roughly at the same height as the intake and shove the hose into the intake..    let nature take its course as you walk away

Just do not hang the bucket too high..  it will syphon in on its own and stop then engine and fill the cylinder with water (found that out the hard way)

The venturi effect of the intake sucks in just the right amount on each stoke..  it does not need to be perfectly metered..  it just needs to be done on a regular basis

It all evens out over time :)

Keep it simple

John

Title: Re: Diagram/descriptions/photos of water injection systems? 6/1, 8/1?
Post by: Hugh Conway on January 05, 2020, 06:36:09 PM
Farmerjohn sez "these engines do not really give a shit"
Ha! That's mostly true. That extremely simple water injection system is great! No moving parts, no real failure points.
Maybe not interesting to the inveterate tinkerer, but sure fits the K.I.S.S. principle.
I just spray a litre or so into the intake once in a while, but this  bucket method is even easier.
Our listeroid just passed 2000 hours and continues to bang away uneventfully. Clean fuel, clean oil, a bit of water down its throat now and then.........
Cheers
Hugh