Water Injection 2007
 

Hey hey all the previous Post about water injection know all the fact's stared in 2003. Now its 2007.
2003 was along time ago and im shure all who have used it have learnt something new and we will be able to Exspell the Myth's So lets Fire up this Thread one more Time.

Is Water Injection really a band Aid for a bad/poorly designed/forged motor?

Re: Water Injection 2007
 

I have always thought about it how benificial is PURE WATER INJECTION? does anyone have some stat's cos i know water will supress Detonation/Drop intake Temp. Hence have a Much Healthier/Less strained/ Cooler running engine.

Or is Pure Water Injection just a Myth?

Or does Water Injection actually mean Water & methonal Injection?

Water meth is More Dangerous! it needs more tuning.

I understand meth increases octane and running water meth is piontless if you dont advance timing/Increase boost correct?

But meth costs $$$$ and isnt always Avavlible like water that is free/always avalible?


what si your guys thoughts and view.s

Re: Water Injection 2007
 

this is the 2003 Post https://www.homemadeturbo.com/forum/...p?topic=4257.0

I have read th Whole Post and there isnt actually any stats on how benficial the water injection is, i know they discuss creating the water injection kit, but now they are readily avlible for very gewd prices all over the globe. Why reinvent the wheel right?

I think this is the cream of the crop over the 4 pages (As per Above Link)
Only Still working links
http://www.angelfire.com/super/buickgn/index.html
http://users.frii.com/maphill/wi.html
http://www.imoc.co.uk/technical/article/wi.htm

Re: Water Injection 2007
 

JD's on pgmfi

http://forum.pgmfi.org/viewtopic.php?t=4055
http://forum.pgmfi.org/viewtopic.php?t=6523

Re: Water Injection 2007
 

You can run winshield wiper fluid.. (H2o/methonal mix) the generic shits better as it doesnt have as much detergent in it... 1-2 bux a gallon.

Re: Water Injection 2007
 

Are we ever going to Kill this animal????

Re: Water Injection 2007
 

http://www.customobsessions.com/modu...wtopic&t=10252

an article i did a while back on a local forum!

Re: Water Injection 2007
 

Water injection cools the intake charge: False

thats not true, urrrr, i mean it is true, urrrr, you know what i mean.

it does cool the intake charge if you spray it somewhere further back than the ports. assuming you spray it fine enough, and the air you spray it into is hot enough. without those factors, you dont have the surface area or desire to change state. hence the desire for a high pressure pump to push the same volume of water through a smaller orifice as a lower pressure pump would push through a bigger orifice, but making far far more use of it.

Re: Water Injection 1927
 

Actually, it was all carved in stone by the mid to late 1920s. You aren't changing the basic nature of water injection, what you are doing is asking grassroots enthusiasts without an entry level college physics class under their belt what they currently think on the topic of water injection. 99.9% of the responses you get on any internet forum are not going to be correct, and as a layman you will be motivated by the argument you most want to hear regardless of it's veracity.

Here is the 0.01%, can everyone remove their head from their ass and pay attention to it?

Water Injection Myths


Fred, if you read and refer to the articles I posted, based off of Ricardo's work in the 20s, you will see that zero appreciable intake charge cooling takes place. For thermal transfer you need TIME, temperature DIFFERENTIAL, and SURFACE AREA. Changing system dynamics means significantly changing one or all of these things - for water injection in an infernal combustion engine, you can marginally influence one of these, maybe two with a stupid complex iced down water reservior.

You can't manipulate the SURFACE AREA by any means but spraying more water. Reducing surface tension with acetone or some other surfactant is going to give minimal gains - a correctly designed nozzle + pressure does a great job, and some surface tension prevents the droplets from rejoining as easily.

You can possibly manipulate TIME by spraying water further back in the charge piping (thereby causing it to fall out of suspension with the air, defeating the purpose, and causing it to draw heat out of the charge pipe and intake tract and carrying that thermal mass into the engine, thereby defeating the purpose...)... but when you take into account how quickly the air is passing through a 2.5" charge pipe at moderate 250-300 whp level, uhm, a couple milliseconds? Have fun playing with that massive increase in dwell time for thermal transfer to occur. You get a significant drop in IAT readings because it's steady state submerged in water droplets aka wet thermometer effect, but the real world charge temps don't flicker.

That leaves you with another un-manipulatible, temperature DIFFERENTIAL. These temps mean a lot when you are approaching knock limit, but as far as an impetus for thermal transfer? Forty to sixty ------- degrees Fahrenheit equate to ---- all on the scale we are talking about.

Re: Water Injection 2007
 

although i'm not arguing that the charge temp drop is significant, i disagree that 20 - 30 degrees K is insignificant.

and i do think that well implemented with a mist, not a hosing, it will evaporate fast enough providing that the incoming air is pretty hot. read if you are stupid enough to not use good intercooling and an efficient turbo for your flow, there is a benefit in charge temperature. which is how i qualified what i said in the first place.

the statement was made that it "doesnt cool intake charge" implying "at all"

i was correcting it in that context of being not quite perfectly stated.

excuse my mild form of Aspergers and thus pedantic annoying habits of language fussiness.