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Old 08-14-2006, 12:13 AM   #1
benw
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Default 2005 sti + 20g + coolingmist 150psi = suggest my settings/nozzle!

like the title says, I have a 2005 sti with a new combination going on this week. deadbolt td06-20g, fmic, etc. I will be running a coolingmist 150psi kit utilizing the sti water tank with a boost controller and checkvalve setup.

my question is which nozzle size do you recommend, also what boost switch setting? I will be running 50% distilled water and 50% methanol.

Thanks,
Ben
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Old 08-14-2006, 01:49 AM   #2
hippy
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Is your kit with the controller or not? Either way, the biggest one I'd use is an m9, and the smalles is an m4. The problem with the m9 is that it might have too much flow at lower rpm ranges(like 3500-4500). The m9 might be fine though, even without the controller since you're using 50/50%. It should give ya the best all around performance because of the liquid/fuel ratio you should get. Just make sure not to turn it on at too low of a boost(something like 6psi and 3500rpm or higher should be fine). I'd also make sure to lean out the a/f ratio a bunch(so the reading would be 12 to 1 or leaner on boost).

peace

Last edited by hippy; 08-14-2006 at 02:09 AM.
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Old 08-14-2006, 02:56 AM   #3
benw
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the car will be getting tuned on the dyno, with and without the injection.

would 8psi be a good number to start at, or is that too late? I want to make sure that the car's boost profile feels as linear and smooth as possible, if that can be achieved.
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Old 08-14-2006, 08:34 AM   #4
hippy
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You can start the injection whenever you want. I like to start it at a low boost, cause after a shift when the boost is building quick, the effects of the water will kick in quicker if it gets injected earlier.

peace
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Old 08-14-2006, 12:07 PM   #5
benw
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I notice that you seem to hang out in this forum pretty much 24/7 hippy. And you don't like Coolingmist. What is your setup?
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Old 08-14-2006, 12:42 PM   #6
hippy
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Lately yes, and I don't think there's anything particulartly wrong with any of coolingmists products........ I asked if you had the controller, cause that could help you use a big nozzle without running into bogging problems at lower rpms/boost/air flow. If not, it might be good to select one of the smaller nozzles. Course the nozzle that came with the setup(m6), should be fine(and is in the range I mentioned for your setup).

I made my setup with parts from different places(home depot, aquamist, shurflo,.....). 02 wrx wagon, 18g, Shurflo pump, and a utec controlling the flow of the nozzle with an aquamist high speed valve. 12.5 to 1 running 93 octane pump fuel and water at 22ish psi(a little more). I have no safety system hooked up, other then utecs knock detection. <rant on>If I had to do it over, I woulda spent a lot less on the solenoid and more on the safety end of the system, not that I've needed it. The adjustability is a nice novelty and all, but it took me a lot longer to tune my car because of this novelty. I made the system as adjustable as I could knowing what I knew at the time, because when when I started looking into water injection, it seemed like I needed to have a really adjustable system to get the results I wanted. I don't feel this way anymore....

peace
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Old 08-15-2006, 03:00 AM   #7
benw
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I am not using a controller, just the boost switch. I figure this may leave some power on the table but for tuning consistency and pure ease of use, which is all I'm after, it fits the bill perfectly.

Also can't argue with a good price/deal. Thanks SOTC
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Old 08-15-2006, 09:04 AM   #8
fmowry
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On my 2.5 FXT with a green at 22 psi, I'm running the 15gph nozzle using 50/50. It comes on at 13 psi with a protune using a DIY shurflo pump, Mcmaster solenoid and boost pressure switch.

Frank
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Old 08-15-2006, 01:08 PM   #9
hippy
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Quote:
Originally Posted by benw
I am not using a controller, just the boost switch. I figure this may leave some power on the table but for tuning consistency and pure ease of use, which is all I'm after, it fits the bill perfectly.

Also can't argue with a good price/deal. Thanks SOTC
What kinda ems do you have? How sure are you that you got a 150psi pump and not a 100psi pump? Just checkin.... I'd think that the setup should work fine on your car, and don't think a pump controller would make much of a difference as long as the right nozzle is chosen(m4-m9 being the right size in my mind), and tuned well. A second stage might be nice though......

<rant on>Imo a 15gph nozzle is way way way way way waytoo big. Most people would never think of running higher then a 30% injection to petrol ratio, and without puting out more then 800cc injectors can, you'd be doing it all the time(you'd actually be running 38% or higher). It's like running as much water injection as anyone would run(19% or higher water to petrol ratio everywhere in the rpm range), and the same amount of alc on top of that. I don't think this is the best way to run an injection system or an engine.

Even with a m9 nozzle and 800cc injectors, at 50% of the fuel system capacity(which could be about 20psi and 4000rpm), the injection to petrol ratio would be 40%. This imo is better then running a 15gph nozzle(which would be about 66%), but it's still a bit high and why I said that the m9 might be too big. It might be ok with the right tuning though. Imo it would make a car with 800cc injectors perform better then a 15gph nozzle, since the injection to fuel ratio would be 19.5% and up, and not 38% and up. On the other hand, an m6 nozzle would run about 26% water/alc to petrol in the situation above(instead of 40 or 66), and would probably(as far as I can tell) run 13% or higher everywhere in the rpm range(which is still nice).<rant off>

peace

Last edited by hippy; 08-15-2006 at 03:14 PM.
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Old 08-16-2006, 12:36 PM   #10
benw
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the black pumps from Coolingmist are the new 150psi models, the silver ones are the older 100psi from what I hear. Maybe David wants to jump in and clarify.

I'm using Accessport and 740cc injectors.
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Old 08-17-2006, 09:56 AM   #11
Sharky NRK
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if one were to want to run only water for the detonation reducing safety aspect - would the m4 at 6 psi be a good setup?
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Old 08-17-2006, 10:22 AM   #12
hippy
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An m4 nozzle should be able to get you a water/fuel ratio of 9% or higher everywhere in the rpm range. In the situation above with 50% flow of the fuel system(on a system with 800cc injectors), the m4 should get ya a water/fuel ratio of about 18%. Since it's common practice to run anywhere from 10-20% injection with water, it would seem like the m4 would be a good choice.

There's a small problem with running all water. You can only do it year round in areas where the temp never gets below thirty something degrees. Past that, you'd need to add alc to stop the water from(or something) to stop the water from freezing.
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Old 08-17-2006, 11:27 AM   #13
Sharky NRK
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gotcha, yeah I would probably just build two maps for it one all water - one enough alc to stop it from freezing - (I don't think it freezes here all that often though)

what would be the least size (percentage of water) to run and still be effective for det. protection instead of using it for power production
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Old 08-17-2006, 11:55 AM   #14
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There's is no amount. If you run 1% water to fuel, you will have that much more det protection then without the water. The det protection builds up as there are higher percentages of water to fuel. Once past a certain percent, you can run into problems with bogging/misfiring and what not, but the det protection still goes up(as far as I know).

The power production is a result of det protection and the tune. You could tune for the same power as before injection, and end up having a much safer tune by leaving a lot of room on the tuning table. You can also get more power by using more of the room on the table. Det protection dictates the size of the table, and the amount of room on the table used is dictated by the tuner. Imo the m4 nozzle would be good for running straight water on your setup, but you could run less water. Running less water might make the tuning table smaller though.

peace
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Old 09-13-2006, 12:45 PM   #15
benw
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update: I am going with an M10 nozzle and the Coolingmist angled injector pointing back into the air stream. I will let you guys know how it works.
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Old 09-13-2006, 02:08 PM   #16
hippy
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Do ya think that nozzle will work any better then one of their old ones? Do ya think it pointing into the air flow will mean it needs to be cleaned more? The new nozzle does look kinda nice to me, but it's because it could be mounted where it basically gets no air hitting it if it's mounted in a recessed way pointing at a 90 degree angle toward the air that's passing. That's one of the nice things about coolingmist nozzles too.... Course people can get nozzles for pretty cheap if they know where to look, and then they could try a few sizes, types, or positions out if they're not sure what they want.

peace
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