MazdaRx7Power

does water really work instead of using atf? anyone have any good results with it. if so how exactly do u do it? and does it really remove the carbon?

fastrotaries

There are Water Injection Kits in which water in sprayed into the intake tract via a high psi pump. The water vaporizes and if you advance the timing properly you gain better gas mileage along with a cooler denser air charge temp hence more power. Spearco claims that after 1,000 miles on usage with the W/I the carbon is drastically removed. So yes it's something old. WWII planes used this method, and was adapted by the hot rodders of the era too. Just don't pour gallons of it at once. Dibbles and never so much that the motor stalls.

VashtheStampede

the way you say "instead of ATF" gives me the bad feeling that you are going to try soaking your engine in water like we soak them in ATF (pouring some in the spark plug holes)

i dont think thats such a good idea.

if you mean a water injection kit then yeah, plenty of people run them.
i think it is mostly for added protection from ping at high boost though since it cools the engine internals and helps prevent hotspots.

NevadaLoneWolf

Exactly how much ATF should be used? I bought a quart, but I don't think that I even have to use nearly that much.....

mprime

Someone over on the teamfc3s board posted up info on this. Its a similiar process but you dont soak it obviously. You use a vacuum line to pull in the water while reving the engine. This "steam" cleans the inside and doesnt ruin your spark plugs or O2 sensor unlike ATF.

NCsublime

Well, first of all, ATF doesn't ruin anything. I've done it on my car and let it sit for a few days with no problems whatsoever. I know many others have done it too. It actually made my car run about 600 RPM lower. In other words, producing the same amount of power but doing 600 RPM less work. Anyway, I haven't tried the water yet, but it was recommended by Rob Golden (Pineapple Racing), and has proven to be successful for some people. Do a search for "H2O cleaning" or something similar and there are a couple of threads. I searched for it yesterday and found 3 or 4. Anyway, good luck. If you want a write up on the ATF treatment, then go to www.mazspeed.com . Then go to "FACTS," then go to "ATF FACTS." Sorry the link would not work for some reason.


-Derek

mprime

I was alway under the impression you need to change your O2 and plugs after you do an ATF.

tesla042

It's not the best thing for an o2 sensor, but it won't kill it with just one application..

The plugs will likely be fouled after this.. It's a good idea to have a set of crappy plugs to use when you do the ATF treatment..

Above, someone asked how much.. Both times I've done it, i've used one full 16 oz bottle of MMO.. Granted, a lot got on the ground, but most of it got in the engine.. I'd squirt a bit in one rotor, a bit in the other, and fully rotate the engine to the next rotor face.. repeat till empty.

-Tesla

NCsublime

Yeah, I'd use some crappy plugs. I saved a set just for this. When I did it, though my plugs didn't get too fouled. We grinded (with one of those fast spinning wire wheels-sorry don't know what they are called) off the carbon deposits and they look pretty good. Not quite good as new, but close.

TristanTII

Does anyone know the thread on the teamfc3s forum that describes how to do the water trick (how much to use, which hose to use) or if theres a write up on here?

VashtheStampede

you could use any hose on the manifold, they all see vacuum unless you are under boost. (and id like to see someone TRY doing this while hanging off the side of their car going down the highway)

although the boost sensor vacuum line is supposed to have a restrictor pill in it so i dont know if that would be a good one to use. maybe the line for the BOV would be convenient. (would the BOV stay open if that line isnt attached? or would it stay closed?)

at any rate, with the engine running i have to say it sounds like a great idea to me!

PaulC

The ATF treatment will smoke like a mother. And Water injection is a tried adn true method. Like was said WWII air craft used it. And even some modern jets still use it to incress compression.

And does anyone have a link to a H2O injection kit????

VashtheStampede

http://www.spearcointercoolers.com/h20inject.htm
part # 980 - $210

SaabGuy

I think this guy is talking about the old trick of dumping warm water down the intake when the engine is hot.

This old trick was used on old carberated motors and actually steam cleans the engine very quickly. It would be a good quick fix for our rotaries but it will be a pain in the butt to do it since the engine likes to stall when any intake piece is removed. I guess you would have to hook it up to a vaccumm line.

The water injection kit is completely different. It mists water into the combustion chamber to slow down the combustion process and reduce detonation/intake temperature dramatically. I dont know if water mist will break apart carbon buildup.