DIY 100 Octane Gasoline

[lost180]

Originally Posted by nissanfanatic

Instead of higher octane fuel, Water/Alcohol injection can work as well. It just cools the intake charge much better than only an intercooler. Hypsi was telling me that he was running 26psi or so with like 26* timing advance on pump gas. I'm planning on running it soon.

I'll just pretend I never read that

[nissanfanatic]

Originally Posted by lost180

I'll just pretend I never read that

Truly high specific outputs are only available when using high octane fuels or by injecting anti-detonants.

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K? Good.

[AWDSR20]

what? using water alchole mix to cool ur intercooler..what is wrong with that? isted of using just water.

some people use nitrous oxide or carbondioxied gas to cool the intercooler.

i think u didn't read his post veary well...

[Pavlo]

Originally Posted by nissanfanatic

Pump gas supports 16psi on a KA. Which is about 340whp for the guys without super-hero tuning systems. Knocking is not caused by lean mixtures.

...Without super-hero tuning... You can run much higher boost but you will need a shitload of tunning.
By the way F1 cars back in their turbo days were running a mixture of gasoline and toluene at 75psi on their qualifiying engines. So my advice is- if you do not have a $1,000,000+ engine don't do it. Alcohol injection is a good thing when your car is properly tuned. Using it instead of good tunning is WRONG. Yes it can reduce knock but I think of it as a band-aid unless you have a properly tuned car and want to sqeez a lil more out of it on the dyno or track.

[lost180]

Originally Posted by AWDSR20

what? using water alchole mix to cool ur intercooler..what is wrong with that? isted of using just water.

some people use nitrous oxide or carbondioxied gas to cool the intercooler.

i think u didn't read his post veary well...

hmmm, my bad. That IS a good idea. Guess I misread that.. thought he was talking about running his car off water and alcohol (or joking about it, he did say water injection )... water w/ alcohol ON the intercooler, that seems like a good idea. b/c it'll evaporate faster right?

[AWDSR20]

yeap... it will take heat off the intercooler hence denser air...

[nissanfanatic]

Water dissipates heat very well. Hence it is often ran as coolant in engines. Same applies to intake air.

Water injection can allow tuning mistakes to slide. And no matter what your tune will be imporant at 7+psi. Tuning is always imporant. All water injection allows is more power on a lower octane fuel/a more efficient setup(more timing). IT doesn't solve tuning mistakes.lol

[240SXSlideStar]

I'm thinking or runing like 25% coolant in my rad, it'll be cheaper, lol, and I never drive my car in sub zero temps, soooo.......

[monooxide]

So what your saying Nissan Fanatic is that every Supra that I see above say 25psi and the phatka-t 240 is all running some kind of injection wether its alcohol or water? I dont think so.

[nissanfanatic]

No, I'll say what I'm saying. Savvy?

Water injection allows for lower octane fuel when racing fuel would normally be required. It has limits like anything else. When you reach the knock limit, you have four options:

1)Lower compression rato
2)Retard timing
3)Run higher octane fuel
4)Water/Alky injection

When you are running 8.5:1 CR pistons, timing is retarded to 20*total timing and you are about to start running racing fuel to make more power, this would be a good time to run water injection. On the existing setup, you could run water injection and prolly advace timing to 25* BTDC. You will see a noticable difference in torque and power alike. Since you now have 5* of timing to play around with, you have the option of upping the boost without running racing fuel. More timing advance always means a more efficient setup. Timing makes power. Even a two degree advance can make a noticable difference. So the objective is to run as much timing as you can without detonating. And if you try to run 16psi on pump gas with a basic intercooler, your timing will have to be way low. Like 17-18degrees, maybe less. This just is not a good deal. 20* is about as low as you want to go. Water injection can fix this.

[Pavlo]

Easiest way to make water/alcohol injection is using your windshield washer reservoir and engine, so that when you normally would make the windshield washer fluid spray your windows, it will instead cool off the air thats about to enter your engine.

[lost180]

would work, but can you use it at the track? Don't they get pissed if something is dripping.... Guess we'll just have to use an Ntercooler and compressed CO2

[monooxide]

Why would there be something dripping? The water that you inject is going into the intake....and evaporating out the exhaust. If you guys are referring to the same kind of Water Injection they use on planes then it doesnt drip.

[lost180]

So you are talking about dumping water INTO the engine! I don't know where you're getting your info, but dumping water into a piston motor sounds like engine sacrifice to me. Everything you've posted is talking about timing, tuning. And it looks like some good info. But I Still don't see where pouring water into my engine is a good thing. Last time I checked, water and fire don't mix. So unless I start hearing about pros hooking up an extra "water" injector, then I'm gonna stick with this being one of the dumbest things I've ever heard. And if you're refering to using technology used on a turbine engine to making a piston engine faster, then you, or whoever fed you that line of crap needs to go back to VoTech...





Now, spraying water ON an intercooler to help cool charge air is a good thing IMO. STI's come with this from the factory. And NX makes that "Ntercooler" but I haven't come across a water injector yet

[orestes]

no no no no no water gets injected into the combustion mix to lower temps to avoid detonation while still running high boost and advanced timing.

http://www.rallycars.com/Cars/WaterInjection.html