Meth/Water Injection question

[showbe]

I read that cars that are NA could even benefit from Meth/Water injection. Benefiting from increased Octane. Well since I live in California and only get 91 octane cant I use a Meth/Water injection kit to raise my octane levels higher to get over 93?

Are their any cons for running it? I only remember it saying it is only bad if you didnt set it up good. Since if you just put water in the kit it will just cool your internals down.

Or would it be raising the levels too high and would that not be good for a car like the FRS/BRZ.

[serialk11r]

Water is inert and displaces oxygen/fuel, I think it's more for keeping temperature under control which isn't super important on NA. Injecting in the intake tract does less for efficiency than injecting into the cylinder, and you're not going to be able to dump a significant amount of alcohol in like that so it's not going to be like E85. A tuner could probably tell you how much there is to be gained from a slight increase in detonation resistance.

[fuddbutter]

I dont think the water is a great idea..
and injecting meth is not wise, you will get addicted to it, and performance of the car will be a non-issue once you sell it to get more meth..

Just say no dude.. say no.

[Grishbok]

water/meth refers to the mixture of the liquid your injecting, you do not inject pure methanol into your engine, you dilute the methanol with water.

Injecting water-meth can bring you in the vacinity of 107 octane, give or take depending on how much your spraying. It is used primarily to decrease air temperatures and is primarily beneficial on forced induction applications.

cost/benefit on this na setup makes it not worth it at all, if you want power gains, do a 50 wet-shot nitrous, not water/meth.

[speargunsandracecars]

If you're doing something like 24 hours of LeMans, go for it. Otherwise, it's impractical and not very beneficial to NA engines.

[Calum]

After seeing the gains from gas to E85, I've been wondering about this to. NASIOC has a good write up about meth kits, but its very much about FI not NA. So of course they're saying its not worth it on an NA engine. Over there if it doesn't net 50 hp it's not worth it. If a meth kit cold net me 10 hp, be fairly cheap, and play well with a future turbo, I might just be interested.

[Coheed]

Water injection alone is able to pull more heat from the combustion temps than E85. But it does increase the voltage requirements needed by the ignition system. I can see the system working rather well in this engine. Comparable to running E85 anyway, but there are drawbacks.

E85 has similar advantages to water injection as far as pulling heat out, but because it is oxygenated you are getting free oxygen from the fuel. The reason Nitro is a great fuel is because its stoich ratio is around 1.7:1 instead of 14.7:1, it packs a lot of oxygen into the fuel molecule itself. By packaging oxygen into the fuel you are able to use more fuel and get a bigger bang. The extra fuel used also has the benefit of pulling heat from the system through its enthalpy of transformation, though to a lesser extent than water.

With water injection, you don't get the benefit of added fuel. By adding methanol you can get more fuel into the system. Methanol is actually better than Ethanol in providing its own oxygen. It runs around a 6:1 ratio compared to ethanol's 9.7:1. But again, there are some drawbacks... methanol is corrosive to metals in a high concentration, where ethanol is not.

You can run theory all day long though, but the only way you're going to know how well it works is if you try it and let us know. Most washer fluids contain methanol mixtures and work great for refilling. The required amount should be very little for an NA engine, so I imagine 1 gallon lasting for quite some time.

[showbe]

I read a few articles about it and they all say it will pay off in the end since it helps octane so you dont need to use racing fuel. Also living in California we only have 91 octane unless if you get the racing gas at shops which is fairly expensive. They said even water will help performance which is free, so you dont need to use racing fuel.

I stated Meth/water injection not just 1 or the other so I am not just saying doing Meth by it self. Meth/Water or all water. Water is free and it is said to boost performance even if its NA.

Other than a failing pump or not forgetting to refill it what other cons are their? So far I have read a couple articles on different sites that all are pretty big and say their is plenty of benefits from it. But didnt really get into too many reasons on why not too.

[mikeg7827]

Don't give ur car meth mouth!

[invisage]

Yeah I've been doing a bit of reading up on this and everything seems very positive on it including helping to keep your valves and intake clean :P but all has been company info, would like to hear some third party feedback.