would you add water to my set-up? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-05-2009, 12:56 PM   #1
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Default would you add water to my set-up?

~1.9l
8.5:1 static compression
11.5:1 AFR
261whp/252wtq @1BAR

I've considered adding water and leaving the tune where it is just for cooling and safety benefits when running the car on the track.

I'm not sure where to draw the line on safety and being reasonable.
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Old 03-05-2009, 01:25 PM   #2
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Hey that is what I am going to do. I may not use it at 12 psi (GT2871, 9:1 compression) but if I do run it up to 18 psi or so I will be for insurance. I already ordered the kit.
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Old 03-05-2009, 01:29 PM   #3
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i would add water and see about leaning that **** out somemore serius. Safety water is alot safer than the big ole heat collector sitting in front of your car.
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Old 03-05-2009, 01:34 PM   #4
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magnamx-5 is my favorite member. I picture you dressed up as Huck Fin, at a computer. I mean this respectfully of course. lol
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Old 03-05-2009, 01:46 PM   #5
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why golly thats awwfull noice of you mister. yall get up north by me a ways and ile help u best i can.
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Old 03-05-2009, 01:54 PM   #6
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meth ftw!
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Old 03-05-2009, 01:57 PM   #7
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Yup.

I run AFR in the low to mid 12s at 185-190 kPa. FMIC and 50/50 meth / water. I could probably run more boost, but I look at the WI as more of a safety margin.
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Old 03-05-2009, 01:58 PM   #8
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Originally Posted by disturbedfan121 View Post
meth ftw!
Not on your life newb 55 galon drum of methal alchohol is only good for making Formaldehyde in my liver if i handle it to much.
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Old 03-05-2009, 02:21 PM   #9
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Quote:
Originally Posted by hustler View Post
~1.9l
8.5:1 static compression
11.5:1 AFR
261whp/252wtq @1BAR

I've considered adding water and leaving the tune where it is just for cooling and safety benefits when running the car on the track.

I'm not sure where to draw the line on safety and being reasonable.
In the same boat here. My build is almost done but I'm really second guessing the lack of WI. It sure seems like a good safety net/cooler for the track.
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Old 03-05-2009, 04:09 PM   #10
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Ebay kit. Big huge ******* big large baffled water tank in the trunk. Fill it with distilled water when you're tracking the car. Run a good size nozzle ask what size to run.
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Old 03-05-2009, 04:26 PM   #11
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Paranoia, big destroyer!



I thought you already put a conservative afr AND conservative timing in your tune?

How many gallons do you think you would go through during that many hours of boost? Are you willing to add that much weight? Would you run out in the middle of an event? Would that bother/distract you?

I wouldn't give myself another distraction from the other mechanical aspects of the car yet. There are plenty of places that will deserve inspection and attention on your first track day. You probably want to focus on running what you've got and learning how it behaves before adding additional complexity or failure points. If you have a problem with the WI, yeah, it won't stop you from running, but it will aggravate you and cause you additional worry unnecessarily.

I know, I know, it's not like you to worry about things, but try to keep from adding points of aggravation to the mix. It makes it easier to relax and enjoy the moment you have worked so hard to realize.

Enjoy yourself.
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Old 03-05-2009, 04:27 PM   #12
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At such a low price, I don't see why everyone is not using it.
It should be a must really!


Six-I think Hustler is a regular track *****.
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Old 03-05-2009, 04:41 PM   #13
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Quote:
Originally Posted by sixshooter View Post
Paranoia, big destroyer!



I thought you already put a conservative afr AND conservative timing in your tune?

How many gallons do you think you would go through during that many hours of boost? Are you willing to add that much weight? Would you run out in the middle of an event? Would that bother/distract you?

I wouldn't give myself another distraction from the other mechanical aspects of the car yet. There are plenty of places that will deserve inspection and attention on your first track day. You probably want to focus on running what you've got and learning how it behaves before adding additional complexity or failure points. If you have a problem with the WI, yeah, it won't stop you from running, but it will aggravate you and cause you additional worry unnecessarily.

I know, I know, it's not like you to worry about things, but try to keep from adding points of aggravation to the mix. It makes it easier to relax and enjoy the moment you have worked so hard to realize.

Enjoy yourself.
Dude. WTF? Don't say that to huslter, that will push this back 6 months at least.

I'm the one that suggested he do this yesterday and as usual he questions everything and seeks everyone's opinion. Fair enough. So your argument is it adds complexity and more failure points. Ok. But why don't you think about what you just said for a second.

Even if it fails, it doesn't matter. He's running it to have a safety cushion. The motor will be tuned to run SAFELY without it. The WI just acts as a buffer. Peace of mind. If the WI fails, so what. Why people worry about WI failing so much I don't understand. You could just as well have a fuel pump get weak during a session. **** happens. That doesn't mean you carry 3 spare fuel pumps though.

For hustler, he's not even gonna do map switching or boost changing. All he needs is a simple kit. Whenever he puts the car on the track he fills the WI tank with water. When he gets ready to race he arms the WI system. Now when he makes say 5 PSI his pressure sensor closes and the WI comes on. If you wanted to get fancy he could add another pressure sensor that Tee's into the line hooked to the nozzle and hook that to a light or something so he sees a light when he's got water. Then if the light stopped coming on he'd know something was wrong.

WI systems aren't often troublesome as they are relatively simple. As long as he does a good job installing it he'll be fine and it will do what it's intended to do. Telling hustler about how something could break and making him worry more is not the thing to do.
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Old 03-05-2009, 08:36 PM   #14
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Quote:
Originally Posted by patsmx5 View Post
Even if it fails, it doesn't matter. He's running it to have a safety cushion. The motor will be tuned to run SAFELY without it. The WI just acts as a buffer. Peace of mind. If the WI fails, so what. Why people worry about WI failing so much I don't understand. You could just as well have a fuel pump get weak during a session. **** happens. That doesn't mean you carry 3 spare fuel pumps though.
I am in complete agreement here. That is my plan, just tune for without the WI, then inject a little water/meth on top of that to be safe. Plus I am going to have a partial failsafe system included; no pump pressure or no fliud in the tank will result in boost retard. The DO system is less than $250 so why not?
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Old 03-06-2009, 01:37 AM   #15
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given that u want this for the track where u will be running 14-20 mins max prob in boost i would go with about a 1 gallon tank and at your power lvl probly a 320 cc/min nozzle at 100 psi. That should be maybe 4-7 lbs for the water tank 2-3 lbs for the pump and 1 lbs or so for the lines etc. so maybe 18 lbs.
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Old 03-06-2009, 02:39 AM   #16
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I have never really though of WI that way for whatever reason. That exact reason above is why I have never run one on any forced induction, I was too hung up on the " I have to watch the tank and keep it full or I blow up". Never thought about it enough I guess. What kind of time can you get out of a tank (say the washer fluid res.) of water/meth running spirited street driving? Days? Weeks?

Whats a good diy kit/system? Does MS have any kind of output for aux. like WI? I forget.

And wow, I just realised we had a water/meth section... shows how observant I am.
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Old 03-06-2009, 03:03 AM   #17
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the best part of WI is that is scaleable to fit your needs
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Old 03-06-2009, 01:27 PM   #18
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Quote:
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Whats a good diy kit/system? Does MS have any kind of output for aux. like WI? I forget.
PM "Kelly"
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Old 07-16-2009, 03:41 PM   #19
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can someone in the know confirm that spraying water (not meth) will lower EGT significantly? The more I read about lowering egt, the more I see that people discuss water and meth synonymously.
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Old 07-16-2009, 03:44 PM   #20
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I do not see how it cannot. It is just a matter of how much. I'm adding an EGT to my manifold and spraying water so I should have some real-world data in the next month or so once I make it to the dyno. I planned on looking at this anyway.

If anything I would think water would reduce EGT more than meth since it is not adding any more heat to the combustion cycle, just absorbing it.
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