Wondering if any of you run water injection on na engines. Im trying to figure out how to run the pump without an adjustable pressure switch like on boosted engines. Any help would be appretiated.

 

Why are you doing such a thing? Are you having detonation problems or are you wanting to run the most ignition advance as possible?

Steve

 

Well i just like the idea of it. Advanced timing, better gas milage, a cooler running engine, and its supposed to keep the combustion chambers clean. i just want to try somthing new

 

the book "21st century performance" has quite a large section on making water injection work in boosted and NA applications.

Try and get a copy cos it is excellent (its Australian so they like the V8s but they like to apply eastern Hi-Tech techniques) best of both worlds !!!

I think you yanks are even importing Aussie cars now and calling them GTO.....

 

the smarter ones do the same things here.

 

Too true..........

I think its funny when some say

"i'm putting a carb on my car cos fuel injection doesnt work"

what do they do when the carb fails....... fit a horse ?

someone HAS to mock that up in photoshop, please.

 

I call it the GM outback. Half GM half aussie.

What exaclty is water injection? How would this be a benifit to FI cars in general? Usualy water in engines, whether it be in liquid or vapor form, is very very bad.

 

its exactly like it sounds.

you spray a fine mist of water into the intake tract.



99% of the time, its used on boosted engines... like a form of intercooling.

water can absorb 4 times the heat as air.... so a lil water in hot compressed air can bring down the temp ALOT.


it also stablizes the combustion process.. letting you get away with lower octane, or running more timing under boost....

and the steam from it in the chamber keeps everything clean and new looking.. no carbon build up.. (and that means even more detonation resistance)


thats only a general overview.. and i dont think hes going to have much positive resuts from running it on non boosted TBI.... if he does it right, it wont hurt anything though, so if hes willing to try it and post results, im for it.

 

Yea I am aware of the concept of it but for IC engines running on pump gas it won't work as well as it does for other fuels. The combustion process already creates water. This water is formed as a result of the combustion process and then is split up and combined with other stuff to form sulfuric acid, Co, Co2, and a few other stuff. As fuels change over the years so does the stuff that comes out of the combustion process. There is hardly any sulfer found in fuels these days anymore. Hmm this is kinda interesting. Introduction of water vapor usually drastically reduces power because it is displacing oxygen out of the intake charge. That is why there is a humidity correction factor for dynos and tracks. Neat idea but I think it needs some more probing. I'll ask a few questions here at school. ANyone have specific details on how water injection is used for specific examples? That would help to determine its possibilty with pump gas.

 

what details do you want?

there are some GN guys running close to (or over ) 20lbs of boost with no intercoolers, only water injection...


edit:

btw, they're doing it on PUMP GAS.

is that amazing or what?

 

http://www.turbomirage.com/water.html


when i get home, i'll post mroe links.

 

Woah really? Thats pretty neat and I did not know that. Looks like I have to do a bit more research.

 

it also means you can bump up the compression

 

once i get it all up and running ill post somthing about the results, might be a couple weeks though

Walter

 

Are you running any boost. The combustion temps for a NA engine are right where you want them. You actaully want heat. Boosted applications add heat to the system so this is an effective way to vacate it but retain the advantages of boost. This is pretty neat stuff.

 

not im not running any boost, but im gonna be running 10:1 to 10.5:1 compression on this new engine so it should help some what so i dont have to use the expensive gas. I will be trying it on ye old l03 first though.