Terrh

iTrader: (7)

I DO NOT want to go FMIC and cut my car, so I'm looking at ways of making the stock TMIC more efficient... I was thinking about a sprayer.. who here has done this? Any pics? Effectiveness?


Thanks,

Daniel

andrew lohaus

i havent but i know a few guys with fds here in gainesville that have. baisicaly what you do is take tubes from your wind shield squirters and plumb them up to a nozle that you aim at the IC. fill your washer tank with ice water, squirt and enjoy. i think you need a diod to keep the wipers from fliping when you spray but im not sure on the specifics and where in the curcuitry it goes. you might check the 3rd gen forum. lots of those guys do this kind of rig. they say it realy helps in trafic/low speeds and on really hot days.

NZConvertible

You cannot use windscreen washer nozzles for an IC sprayer. You must use proper atomising nozzles or you will achieve nothing.

Read this series of articles on building an IC sprayer.

Note that you will be using a lot of water to make the TMIC work anywhere near as well as a FMIC. The amount of heat rising off the engine is considerable, so you're spraying to remove heat from both the heated intake air and the engine.

Elysian

my 87 TII is sitting in the junkyard right now, i was thinking of taking the windshield washer sprayer system out of it completely, constructing a oval shaped sprayer that sprays out of a bunch of holes, and mount it on the IC, i think it would work great, i just gotta work out how to make it spray the whole surface, but i know its within my ability, and i will also check out the link NZ posted and get some more tips...

andrew lohaus

yeah i forgot to mention this. i think they were using mister nozzles for flower beds thay got from lows. they said it only cost like $5 to set up.

NZConvertible

It won't. The problem with that approach is you're still squirting the water, not spraying it. The water must be very finely atomised to have a noticeable cooling effect. IC sprayers work primarily on evaporation of the water, which absorbs a lot of heat energy from the core. The rate of evaporation is directly related to the surface area of the water droplets, so the finer the spray, the better the cooling. Just squirting solid streams of water at the core will do very little.

This is what you want to see.

SpeedFreak03

Well said NZ. I have read the same thing in many places, and its true: Spraying huge droplets does nothing, as it takes longer to evaporate. If done correctly sprayers can do a world of good, but if done cheaply/ghetto (windshield sprayer nozzles) it won't work good at all.

Elysian

yes i read that article after i posted, and i see what you mean, and will look into some sprayers like that, thanks

andrew lohaus

that isnt to say this should be expensive to put together you just need something that puts out a fine mist and you'll be good to go.


a nother trick is to put insulating tape on the washer tank so it will stay really cold if you fill it with ice water for a track day or just for kicks. imagine the jump in cooling power when you dowce that sucker with 40deg. water!

SpeedFreak03

Yea thats what I meant, I just didn't want him to use the windshield wiper nozzles and expect it to work well .

Elysian

yeah i was thinking of using 2 resevoirs, the one for the front windshield sprayers and the one for the back(the ones out of my 87 TII sitting in the junkyard of course), that way u don't gotta worry about running out really fast... also was thinking the ice water route too

SureShot

Old redneck trick:
Buy a sno-cone (no flavor) at the consession stand.
Rub it in to the IC just before a run.

Terrh

iTrader: (7)

SureShot: OMG, that's a great idea!

Bump, because I still haven't seen a post from someone who's actually doing this on an FC...

hugo20

Im workin in commercial refrigeration, what we often see is "ice bank".

I dont know how much powerfull is the rx7 a/c compresor, but i think you could put the "evaporator coil" in water, and make a big block of ice, after that, just have a secondary reserv for water that will pas true the block of ice. And, that water sprayed true the IC

Cold water absorb 910btu/lbs(If i remember good) when sprayed.

The second best is Amoniac, but you wont like the feeling...

You can spray any other gaz, like Co2 or something else, cause the pressure drop will allow gaz to absorb a lot of heat too.

Wankel7

Also, if you want to keep your TMIC consider water injection. This is where water is injected in a fine atomized mist into the intake.

And yes, this works very well.

James

Terrh

iTrader: (7)

"pure" water isn't necessary, so why not an alcohol/water mix, like windshield washer fluid? It's super cheap too (like 99c/gal in the summer), and evaporates WAY faster than water.

Is it possible to finely atomize water without using alot of pressure? Where can one of these nice nozzles be found? Doesn't look like something from home depot....

NZConvertible

Read the articles...

theloudroom

Has anyone tried using a peltier junction device to cool the liquid in an insulated reservoir?


Also, has anyone tried different liquids?

Someone mentioned an alcohol/water mix. It seems like you wouldn't be looking for the liquid that would evaporate the quickest, because you want to remove as much heat as possible. I guess it's some sort of comprimise between heat of vaporization, and rate?

I guess rate, would be controlled by thermal conductivity and heat of vaporization. IIRC water is tough to beat for heat of vaporization.


I would be interested to see a car with IC sprayers and water injection, which both drew water from an actively cooled reservoir.

Fitness Stain

rotorbrain was toying with this idea to implement into his 3rd gen...not sure what ever happend with that....hit him up thru here and im sure he'll tell what he came up with

motorolah

what about those cryocoolers? they any good?

Terrh

iTrader: (7)

it's difficult to actively cool water in any significant amount.. I've got a dual peltier pop cooler that I made a few years ago.. even with both of them going and two heatsinks/fans in a relativly cool invironment, I can't get the pop below about 45F.. and that's just a can of pop... nevermind a largish resovior of water in a 170F engine bay...

prjct87rx7

iTrader: (7)

what if you used dry ice instead of ice i would be like 20 degrees....damn...........