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Water/Meth Injection

6.5L

6.5L

Old Iron Runner
Messages
1,177
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433
Location
Northwest Wyoming
So this is getting pretty far down the road but I do plan at sometime adding water/meth injection to my truck to go for my next power goal of 225rwhp along with some other mods. I think I heard somewhere that methanol wasn't good on our motors and to simply run water injection? Is this correct? Why is methanol bad for them if this is true? Is there a limit to what we can run? I don't plan on running a huge amount of it. Some small jets with just some washer fluid? I didn't think that window washer fluid had that much methanol in it. Any idea's? Is there anyone out there running water/meth right now? What kind of EGT drops can I expect? Sorry for all the questions. just doing my research.
 
Lots of us have water meth, I do. I only run water, I did see on Heaths site years ago he advises no more than 10% meth but like I say I only run water as I only use it to cool the egt's and yes it works. Towing is the only time I use it and I only use it on hills. I can go through 5 gallons of water fairly quickly. Lots of threads here on it for our trucks. Ed
 
meth has a lower flash point then diesel so if you put too much in it could possibly ignite in the precup and that would just not end well. compared to a modern diesel with direct injection where it is all contained in the combustion chamber
 
Would running straight water help raise power since it cools IAT's down a lot? I don't plan on running it a lot. Just if I am ever towing heavy and need to drop EGT's or if my truck is on the dyno. I am gonna wire it into a toggle switch somehow if I can. If I had it on always set for when my boost goes above a certain point, I would go through way more water than I actualy need. Thanks for the info though. and yeah, I would hate to blow a pre-cup out. Catastrophic failure isn't my strong point haha.
 
I honestly don't know if you can say straight water raises power levels but, where it shines is I can keep my foot down considerably longer with spray than without. Eventually I do have to back off the throttle as egt's will still hit the red zone. Ed
 
it can help power a little bit if your iats are really high but if you have an ATT it probably wont help as much if say you had a GM3
 
Makes sense. Also is anybody running HO injectors. I think at least one injector isn't operating like it should. Unknown age on the injectors. I was either going to replace with OE or HO. The more I hear though is that the HO aren't really worth it. Any idea's?
 
I have HO injectors from heath's. You can learn a lot from reading one's signature. It is my understanding that the IP is the limiting factor when adding more fuel. Stock injectors should flow more fuel than the IP can put through them. I went with HO cause I heard the fuel is more finely dispensed into the cylinder. Plus at the time our Canadian buck was worth about 1.10 to the US buck so I saved money there. A neighbor of Bill Heath installed them. Ed
 
I don't think it's so much of a case of lowering egt's as opposed to being able to keep your foot down for a harder and longer duration when climbing hills. Like I said earlier the egt's will eventually hit the red zone. Even on the flats, I think you'd be surprised at how quickly you'd go through water. If I had to guess I'd say I can burn through 5 gallons of water in under 30 miles, look at the nozzles I am using, one 5 gph and one 10 gph. That's 15 gallons per hour. If you read my sig you can see the mods I have done. I suppose the possibility exists where if I had an intercooler then there would only be engine heat to deal with when climbing hills with water injection. If you are asking if it's worth it, yes, Buy the pump, hose, nozzles and skip the controller. For a reservoir I use a 5 gallon marine gasoline tank. I lucked out as the fittings were a perfect fit for hooking everything up. Ed WaterMethInjectionInstall011.jpg
 
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