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Power Strokes
7.3 Aftermarket
Water/meth injection question
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[QUOTE="CurtisF, post: 1077760, member: 829"] First question that should have been asked is: why do you even need water/meth in the first place? Spraying just straight water works great for drag racing and sled pulls, where EGT's typically get very hot very quick. But if you're daily driving and/or towing and your EGT's are out of control to the point that you need water, then you need to re-examine your truck and how you drive it. There is either: 1) something wrong with your truck, 2) you have the wrong combination of modifications, or 3) you're in the wrong tune if you have a chip or programmer. Throwing water injection on is simply a band-aid to cover up one of those. Looking at your sig, you're running stock injectors. There's no need for water injection. Then you have the methanol on top. Now you're introducing a fuel through the intake. Granted meth doesn't have the BTU's of say propane, but there is still the possibility of popping a motor. Why? Because once the meth enters the combustion chamber, you have zero control over when it ignites. Pre-detonation with too much meth at the wrong time can cause enough of a spike in cylinder pressure to do real damage to the motor. Where diesel fuel is injected at a precise moment for a perfect combustion, meth is already present in the cylinder long before and can ignite whenever the conditions are right. Those conditions can vary by temps, boost, RPM's, etc. There is no computer controlled precision. Some folks might say you can get tuning for water/meth. No, tuning does NOT control water/meth at all. Tuning controls the diesel. You're simply backing off the timing of when the diesel fuel is injected, not when the water/meth reaches the combustion chamber. I'm sure I'll get some flack for this, and there are many folks who will chime in saying they've run it for years. That's great, many people do. But at the very least understand these things: 1) Know the risks of water/meth or any power adders that put fuel in through the intake. 2) Don't use it to cover up a problem. Make sure your truck is in excellent mechanical condition. [/QUOTE]
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