i finally got around to finishing up the ai install. i have the Coolingmist CMGS kit with the 250 pump. since its been awhile i forgot what size nozzles it came with so i just installed the smaller one (i emailed them asking so im waiting for a response.)

i set it to come on at 7 at first and 10 max.

So i finally go out to test it and i drive normally waiting for everything to get warmed up.

Got on the highway and did a pull.. from about 42C to 30-31c so i know its working.. but there are 2 problems. The AIT only dropped after i let off the throttle I have a fast acting AIT not the stock one, in the stock location..

I believe its normal for the air temps to go back up almost as fast as it went down..

Still i think it should change as its happening, not after i let off.

Second problem, is that im getting lots of breakup at around 6.5k to 7.5k now.. i believe its from maybe to much water being pumped out, im going to get my twinpower hooked up as soon as my harness comes in the mail to give that a test before i lower the max duty cycle to the unit. any other opinions would be helpful..

 

The Coolingmist kits come with:
1 6.22 GPH injector (small diameter orifice)
1 12.2 GPH injector (large diameter orifice)

 

I would suggest any time you run some sort of AI you should really beef up the ignition system. Twinpower should work ok but I'm no authority on the subject.

 

waiting for this dam place to ship my harness for the twinpower.

 

When on boost the turbos are going to be pumping out heat so looking for decreasing AITs under boost may be expecting a lot.

I recently installed a water injection system and some limited testing showed IATs decreasing from high 30s (C) to high 20s after a sequence of high rpm, high boost runs. Each incremental drop is reported within a few seconds of letting off the throttle until the temperature finally stabilizes.

I have the stock sensor in the stock location so it will not react very quickly - but I'd still be surprised to see AITs drop under boost.

 

I'd agree.

 

really?? i thought i heard people say you can see the temp drop as your boosting.. wouldnt the reason a water injection is for is to lower air temps? what would be the point in temps getting lower only after you let off and then they go right back up since it gets the hot air from the turbos again when no water is present??

 

For me at least, it stops them rising during boosting.

Previously, I would get a 2-3C rise after each boost sequence (until I reached AITs of, say, 45C and the temperature stabilized). Now I get no rise and a slight drop after I get off the boost until it stabilizes.

Remember, when the turbos are producing boost they are also pumping heat into the engine. I could be wrong, but asking WI to not only counteract that but also to reduce while boosting is asking a lot.

I should emphasize that I am no expert (I have only had WI working for a week) but I have had incredible IAT reductions from WI. Looking at my previous logs, all my IATs stabilized at 40C or so; now they
stabilize in the high 20s.

I can also hold my hand on the UIM after I stop the car whereas previously I could fry an egg on it.

 

i dont believe it is asking alot to reduce temps while boosting.. i figured thats why it would help ait during boost.. if it was after there really wouldnt be a point.. its suppose to help temps while on boost, Thats what i been thinking since i learned about it.

 

If you want temps to drop, run meth. When I was running 100% meth, I could touch my UIM after doing a few pulls and it would be cool to touch.

The purpose of the water is reduce knock (big win here), increase a/f density, and to keep the temps from rising significantly.

 

im going to give it a couple more tests. waiting for my twin power which should be here friday.