Has anyone tried these water/fogger sprayers that are used to spray on the intercooler during high boost?? Do they work??? I have also seen similar coolers using CO2 and NOS on ebay.

 

There was a thread here a long time ago... Guy had a No2 sprayer on FMIC. Ended up popping motor due to lean condition from extra cold charge... Don't know much else though...

 

I think you are confusing the difference between water injection systems and the intercooler sprays.
Water/alcohol injection system provides a fine mist of liquid into the intake of the car (intake elbow or throttle body). Intercooler sprayer puts compressed gas onto the surface of the intercooler. The process of gas expansion is endothermic (like freon in your AC) and quickly freezes parts of the IC to sub-zero temps and thereby inproving the IC efficiency. Spraying water will drop the IC core temp by a few degrees but would not provide any sigificant performance increase, that is why it is injected directly into the path of the intake air. You would need a whole lot of water to be sprayed on the IC all the time for any kind of result, the added weight would be totally counter productive.

 

Saw on eBay a co2 sprayer, going for pretty cheap. It seems like a badass idea for a stock mount to counter the lack of cold air hitting it. Especially for how cheap co2 is.

Anybody actually use them? Or know how big of a bottle you'd need?

 

It would probably only last you a few sprays, maybey 3 runs at the most depending on the bottle. I heard 5lbs bottles for C02 is the norm but seen alot bigger.

 

I just use water / rubbing alcho... run a vac hose from window washer pump..
seems like it's working great with my smic

 

What mixture do ya run that at (50/50)?

 

One of the fastest guys at the revolution used an intercooler sprayer to cool off his m2 smic intercooler (before) a run. He added an aftermarket fan on the smic to assist with the cool down. Spray on the front, fan on the back. Seems to work well. mids 12's with basic mods.

 

Just got mine on my car yesterday. Made one run on the street with it at 15 psi in non-sequential. It is the DEI C02 kit that is on when at full throttle. It pulled so hard through the gears and hit 3rd so hard it knocked my radar detector clean off my windshield. I love it so far. Going to an 1/8 mile track tomm. and will post my times. Then going to the dyno again next week. Gonna do about 4 runs, 2 w/ CO2 and 2 w/o. See some power gains.

 

Sounds great keep us informed to know whether its worth it or not.

 

From what I have read, the water injection ones don't do much if anything to really cool the intake charge down. They tested the Evo VIII and couldn't see a difference using the spray-mister.
I can see how the C02 ones would naturally have a better effect, as it is so much cooler.

 

I heard that the aquamist systems are great for improving low end power... That alone would be worth it, single turbo with aquamist setup, oh man, OK time to wake up, sorry...

 

There is some confusion here.

The Aquamist is an injection into the charge air (goes into engine intake).

A intercooler sprayer (typical many Mitsu EVOs), spays water on the intercooler exterior to improve heat transfer.

 

No confusion, Im just sayin aquamist is said to be great for Low end power, that alone would be worth it, Spraying a cold charge on the intercooler to bring down temps just doesnt seem as logical to me as an aquamist setup does...

 

I use 40 water 60 alcho..

 

Thats the way to go, I ran into LUV94RX7, he uses aquamist with just straight water and said it works great...I didnt ask why he didnt run a water/alcohol mix tho...

 

I looked into the "air pax" on my DC-9s intercooler system at work...it turns out they used to use a water sprayer system to help cool the compressed air for a/c.....I asked the tech rep why they stopped he said only due to long term corrosion concerns.... btw the intercooler system on the DC-9 is capable of cooling 400 degrees down to 38 degrees!!!

 

Hey Jetmech any site we can get info on these systems???

 

Oak Harbor?
I grew up in Oak Harbor and moved away in 10 grade. I miss that place!

 

I am not sure of any site...but I have many books from the schools I have gone too...maybe I can scan a few pages or something?

 

I was just talking to a mechanic friend about these today. He recomended the intercooler spayer over the aquamist type. He said he used them about 10 yrs ago and upon rebuilding engines he found rusted parts. Maybe aquamist with alcohol won't have the same effect but he claimed a huge drop with just a getto mist intercooler sprayer and a manual triger.

Oh and I asked him about spraying water on hot metal parts and he said only the cast iron will crack and the aluminum was ok.

 

Hey this is coming stock on Lancer Evo VIII's and is a proven profomance upgrade. You are right that it is not as good as rapid expansion cooling but it is much more practical. Who here cant get there hands on water easily??? Who here can get ahold of compressed gases??? Thats what I thought. For a daily driver a water spray bar is better for practicality reason. Use distilled water to prevent deposits.

Tripping as I step off my soap box.

 

good point!

Default PFC temp correction values, from Eric:

+80° = .957
+50° = .984
+30° = 1.012
+10° = 1.055
-10° = 1.102
-30° = 1.148

seems to imply no correction if IAT sensor is 40C, so table ms values used unchanged.

below are the ideal corrections, basd on air density verses temperature, normalized to 40C. also lists the % richer (or leaner) the PFC values are based on theoretically correct values:

+80 = 0.887 , +7.9% ... (176F)
+50 = 0.969 , +1.5 ... (122F)
+40 = 1.000, 0.0 ... (100F)
+30 = 1.033 , -2.0 ... (86F)
+10 = 1.106 , -4.6 ... (50F)
-10 = 1.190 , -7.4 ... (14F)
-30 = 1.288 , -10.9 ... (-22F)

richer than needed when hot (for stock IC), leaner than needed in very cold conditions. note base ecu tables were quite rich for stock set-up.

Point is if PFC is dyno calibrated at 100F IAT temps, and later CO2 drops temps to 50F for fun, then 4.6% leanout occurs .... if tuned at 12.5:1, your now at 13:1.

For supercooling a big IC, better adjust the air temp correction maps with datalogit.

 

Its not that simple. I am a F-16 electrical and environmetal specialist and it is true that they use water to aid in the cooling of the environmental system but this is how it works.

Bleed air is taken from a compression section of the turbin engine (before fuel is added) this air is anywhere from 600 to 1200 degrees. It is normally then routed through a heat exchanger (intercooler) it uses ram air to cool while in flight and a ejector system that draws air useing vaccuum theory while on the ground or below 128 knots. On the F-16 it then passes through secondary heat exchanger same as the first. At this point the air is cooled to around 400 degrees it then is passed through a tubine that compresses the air. We all know that compressing air does what to temps? Increases them so they have to run the air through a third heat exchanger which is called a regenative heat exchanger. This is the one that has the water sprayed across it. I will tell you how they get the water in a minute. The air then goes back to the turbine side of the compressor and the air rapidly expands and is then well below freezing. You may ask what about ice from the moisture in the air. First off the system incorporates a valve that reintroduces hot air to bring the temp back up to above freezing around 34-38 degrees. To remove the water the air then goes the water separator which is a cone shaped canister that the air swirls in and centrifugally pulls the water out of the air. The water is then channeled to the thrid heat exchanger and sprayed across it then dumped overboard. The water is not corrosive because it is just mosture from the air not hard water. This system is only good for 15,000 feet or so (not sure on exact figure). There is no moisture higher than that and it is freezing cold outside the aircraft. Approx -60 degrees at 40,000. so they are more concerned with heating than cooling. But they still need to cool down that 900 degree air a little.

The system is actually much much more complicated than this but that is your lesson in Aircraft Environmental Systems.

(This was the F-16 setup and there may be slight variances with other aircraft)

 

I know Nocab said he popped a motor using the n2o sprayer because some of it leaks into the engine bay and into the intake, creates a lean condition and detonates. I don't know how the c02 would do. Seems to me that water injection is not only the best bang for the buck but also the safest alternative.