edge

Hi.

I want to install a water spray for my Hybrid FMIC. But I'm having some doubts about the which type of nozzles to use, their prefered location and also what type of spray pattern is more efective. I found alot of info no DIY setups here at SN, but they're for top mounts.

If anyone has any views on this subject and links from where to get the parts, it would be great.

Cheers,
Paulo

willfal

i have sent you PM,

the problem you will have with Front mount water spray is siphoning. your choice of nozzles wont help.

regards
Will

dragonwrx

yep i had the same problem nozzles constantly leaking on even tried one way valves and that didnt seem to solve the problem either.any suggestions or ideas to overcome would be great.

andy99turbo

You could try running a return tube back from the last nozzle into the reservoir, this may help

What nozzles are you using ?

fujack

Hi have you tried pressure valves like saabs use they only open under pressure?

dragonwrx

i got some ones off a volvo with a ball bearing in kinda thing also tried headlight washer jets but they all seem to leak.ill try the saab ones tho if i can find some.

scoobyDAZZA

i moved my head-light washer jets to the left and right of the no. plate bracket
now i've got to get the holes filled in and that's that

R19KET

Are you doing this because your intake temps are too high ?

Has anyone else who's done it recorded any noticable drop in temp ?


Mark.

willfal

the only way to resolve this properly is by use of a water solenoid, i can supply these PM if interested.

Will

dragonwrx

scooby dazza,is that using the normal waser bottle in the same place behind the battery?

R19KET

With regard to siphoning, has anyone tried the one way valve Halfords sell for windscreen washers ?

Has no one got any temp info ?

Mark.

DubaiNeil

I get approx a 4C temperature drop due to water spray (measured on a thermometer probe inserted in the hole left from the throttle body water bypass change - so not direct charge air temperature, that's the next sensor to be installed!). This is however from much higher ambient temp than you guys will experience. This is on an APS FMIC with two spray jets, running on a normal washer pump fed from the washer bottle.

I don't understand the siphoning issue not being resolved by a one way valve - the Halfrauds version worked fine for me! Try blowing through one to understand the air pressure required to break the seal!

DubaiNeil

Forgot to add, the SECS monitor for some reason also see's a reduced intake temperature (measured at the MAF I presume) when the water spray runs - I can actually get this to be lower than the displayed external air temperature - does that mean I've got >100% efficiency now

Rob Day

iTrader: (78)

Hi Guys, Well I figured i might as well resurrect this thread rather than start my own, but basically I have plumbed up the FMIC spray at ease using a Scania jet, it works a treat, and I have also managed to get my hands on a 0.5mm drill bit to add more holes to get a more evenly covered spray/mist.

Anyway the real reason for getting this thread going again is becuase I have now sprayed my FMIC Black so Im aware it will likely get more heat soak than a silver on, but as I dont have stats to hand just yet its all guess work.

However I have the same siphoning symptoms as described above, so im going to look into this one way valve

Rob

Rob Day

iTrader: (78)

Ok so I have been doing a little home work regarding the FMIC spray siphoning the tank, and here is what I have found:

The below was robbed of an RX7 forum

Your first application will also be your last. To prevent that, create a siphon break by putting a tee and a short length of hose with a Whisper one way aquarium air line valve at the end, on the hose at a point above the washer tank at the back of the car. It is important to create a fairly sharp bend in the hose and put the tee at the top of the bend for maximum effectiveness. The one way valve prevents fluid from squirting out under pressure, but air is pulled in to the hose, breaking the siphon after the washer is turned off. (The end of the valve that you CAN'T blow through is pointed toward the tee.) Use the sprayer for a second after filling to make sure that any siphon that was created during filling is broken.

harvey

iTrader: (48)

If the intercooler core is efficient you are completely wasting your time and effort putting water spray on an FMIC.
Subaru introduced water spray so that it could be homologated on rally cars using TMIC sometimes having to sit for several minutes before the off at the beginning of a stage when ACTs could get to 60C and more with anti lag and heat soak.
The intercooler spray helps to get rid of heat soak but has only a marginal effect when you are on the move.
If you want to monitor ACTs then invest in an ACT guage. £87.50 from me delivered but you can probably knock one up from Maplin, PC World or RS Components for about half that price if you are handy at putting together little electronic things.