Ok, one thing I have yet to hear is anyone describe exactly what the differences are between NOS vs Alky. Nitrous oxide doesn't care what engine its in or what turbo is on this engine, it simply cares if its got enough fuel to compensate for the available combustion. If im not mistaken Nos has 4x the content of oxygen therefore it will behave like a liquid oxygen requiring the correct amount of fuel to take advantage of the mix. NOS will make tons of power simply based on how much you spray and how well the fuel is tuned in. Alky on the other hand is symply a combustion chamber cooler. It cools down the combustion chamber therefore allowing more room for higher boost by helping control knock. It does not produce anymore power at all. In fact Alky injection is robbing power. Unless you are tuned leaner and more aggressively Alky will rob you of power. Now racefuel is totally different in that it will absolutely never rob you of anything. Racefuel tune is way more aggresive than an Alky tune should ever be.

So all in all both has their advantages. Please dont claim one is better than the other since its like comparing apples to oranges, they are both good but perform differently. NOS is the biggest power per buck you can get hands down, but Alky will help you out with more allowable boost for a daily driver.

 

Alchy makes power because most people are using it party for intercooling and knock supression as well as a fuel. Basically you can run more boost and more timing with chemical intercooling. It doesn't work the same as race gas does but it pretty much accomplishes the same thing.

If you car is running 100% efficient neither race gas nor alchy will help you....but as you know EVO's suffer from knock and timing retard so both actually will help even if you dont change your tune.

Nitrous is completely different from both of those.....yes it can be used for intercooling because of its properties but mostly its used as a power adder. It will make more power than anything else but it costs more money as well. Its no different than cramming that much more air (x4) into your car so yes it needs more fuel but other than that you are good to go.

Today many people aren't using alchy for intercooling....they are using it like an extra injector with a separate tank of race fuel. I ran 100% methanol for awhile. With an alchy system you can drive your car around all day off boost and not use any of whatever mixture you are using....then when you get on it.....you start to spray meth - alchy - xylene whatever you want to allow you to run more boost and timing without knock. It works great but you are relying on the system to provide NEEDED fuel or knock supression. If the system blows a fuse or nozzle get clogger or pump fails you are going to be running lean at WOT.

 

I've been using NX for months already and one bad thing that is happening to me is that I need to change my spark plugs so often. Is is just me or is it normal that the nitrous system (50hp) wear out my spark plugs fast? I'm running NGK BPR7EIX (iridium). Which plug are you nitrous user using?

 

I dont use iridiums.....I use heat range 7 copper plugs. Plugs should be checked after each run and changed every 6k miles if on the juice alot. How do you read those plugs?

 

I use BRR7ES standard NGK plugs gapped to .024 with the stock evo ignition. That's with a 50 to 80hp nitrous shot. If I run the gap any larger, I get missfires. The plugs also have to be freshly gapped when running the nitrous or I get missfires.

Generally, there is no real gain in a fancy spark plug other than maybe a nice sticker in the box if you paid more than $25. hahaha.

 

As of now Im leaning towards the alcohol since Im not happy with my power on the street, so unless it's there all the time I'm still going to be wanting more.

 

If you want more power all the time nitrous would probably be too expensive for you.

Keep in mind Alchy and Meth aren't cheap either!

 

yeah, nitrous is NOT cost effective for an everyday use situation. Bottle refills cost anywhere from $25 to $45 depending on price per lb of nitrous, and if your refill place likes to empty it then fill a full 10lb instead of topping it off.

on a 50 shot, a standard 10lb bottle will get 8-10 good 1/4 mile passes on my evo.

 

Since I made this post I went about making more power the usual route and now Im rather content with the power on the street but Id still like alittle more, so now Im thinking I may get a nitrous kit for just the times when Im messing around.

Any other suggestions either way?

 

I just picked up an alky kit but really leaning towards getting a nitrous kit and running a map on my utec for both. I guess I need to do some more reading and researching first before I decide.

 

Anyone run both alky and nitrous together?

 

It wouldn't pay to do this. Alky is for cooling and nitrous does the very same thing. Race gas and nitrous is a better combo.

 

So there wouldn't be much benefit to lets say meth + nitrous (50 shot)

 

An interesting setup would be running meth as the fuel source for the nitrous.

That could be promising.

 

Yea that is what I personally plan on doing but need to research some more. I am hoping for a low 11s pass with that combo on stock 05 turbo with supporting mods.