any updates?

>

Considering im studying abroad in Spain right now and I am 3000+ miles away from my car.... no lol

I was just trying to conduct some research about this before I dove with both feet into the project.

I probably wont be to start this until about March or something like that.

But ill make sure to keep you updated.

i may have mine done before u then lol

>

That would be awesome, Id really be interested in seeing what kind of results you get out of it.

Keep me updated.

I had nitrous in my ST162 and used it as much as I could. Its addictive in the sence that when ever you see a chance for a traffic light burnout you arm the system. The ST162 is fitted witha rev1 3SGE putting out 148 brake. I fitted a 100 shot single injector kit and it was maddddd. On the first day I burnt out my brakes, after a while the clutch started to slip, then I blew the headgasket. So i fitted larger brakes from another Toyota, a performance clutch and a steel headgasket - abit modified from a ST205 and the car never gave problems again. It loved the 100 shot of nitrous just as much as me. Never had it on a dyno, so don't know what it made, but it was FAST.

damn a 100 shot huh, on stock internals or what?

Yup, on a Rev1 3SGTE with the above stated mods

Sounds like you ended up with quite little rocket ship there. Now did you mean to post 3SGE on the reply or 3SGTE?... big diff on those motor... main one being the turbo lol

Well gives me hope that Toyota motors like the juice

The ST162 is the 1st of the front wheel drive Celica's fitted with the 3SGE - non turbo
Used a wet kit on it taking the fuel from a tap on the cold start injector line.
Car has since been sold minus the nitrous and from what I last heard lives about 250 miles from me still going well.

I've worked with nitrous a few times, personally I think it's a fun option. It's very important to buy the right kit and to make sure you take all of the precautions when running it.

MSD makes a great programmable window switch which I highly recommend. That combined with the usual safeties (full throttle switch, low pressure switch, etc) makes for a reliable option. Also you need to do your research as to the type of nitrous system to get. The best is direct port which injects exactly the same amount of nitrous AND fuel into each cylinder. Of course this is the most expensive but it's the most reliable and is what I would personally run.

The other type is the dry system which increases fuel pressure to compensate for the nitrous which is being spraying into the intake, this is the type you would normally run on an EFI engine. The downside is that the stock fuel injectors can only compensate so much, so you're limited on how much nitrous you can use. Someone wanting to go this route might want to look into some larger injectors and an adjustable fuel pressure regulator to make sure there is plenty of fuel on tap.

You want to stay away from wet systems which spray both nitrous and fuel into the intake, the fuel will not flow evenly to all cylinders (because EFI engines have intake manifolds that are designed to flow air only and not fuel... they have different flow characteristics) which will often result in one lean cylinder. (The obvious exception to this is if you have a carburated engine, since those manifolds are designed to properly flow both fuel and air).

Finally, don't forget how nitrous works. Nitrous Oxide, N20, is 1/3rd oxygen, vs. the atmosphere which is 1/5th oxygen. The additional oxygen must be mixed with the appropriate amount of fuel in order to maintain a proper air/fuel mixture. In addition it increases power by it's cooling effect which increases air density. The gas itself is not flammable, nor does it "increase fuel octane".

Other precautions you should take include using 92 or 93 octane fuel at all times to prevent detonation, as well as using one step colder spark plugs so that they don't become a "hot spot" and cause pre-ignition.

One last word of advice. Depending on how often you fill the gas cylinder and how often you use it, and how much that costs (it's been a while since I checked), you may find yourself spending quite a bit every month keeping your car on the gas. I once saw someone do some calculations and figure out that after 1 year of using nitrous, he spent as much on it as he would have on a good-quality turbo system. In other words, up to 1 year it was cheaper to go with nitrous.... after the 1 year the turbo system would have paid for itself. Choose wisely.

-Doc

Very well written, Tweak.

This post has been edited by SwissFerdi: Nov 21, 2009 - 12:39 PM

Wow!

This is a wealth of info!

Its also exactly what I have been looking for, thank you so much for all this Tweak.

I will now be doing a lot more research into the system, and if I can afford it I will also be looking into a direct port injection nitrous kit.

Once again thanks!