First.. Yes they will tell you that you need a tune because it will become a liability and once one blows their sh*t sky high then no one will purchase it. Its like vortech, paxton, turbo companies, do you think they would hide the fact that you need a tune? NO! Its ILLOGICAL! Lol!

SHOW me, seriously, a nitrous graph with a lean spike on a 100 shot on a new edge mustang. Please.

As a matter of fact let me show you a sticky on another board from a respectable member who has used nitrous, like me for a while.. This will hopefully educate you...
http://www.moddedmustangs.com/forums...o-further.html

 

Two thoughts on this. First, any reputable company has a very real interest in making sure their product performs as advertised. In nitrous' case this is especially true as the manufacturers have had to fight against safety misconceptions for years. misconceptions that were borne mostly out of early systems that lacked safety overrides, then poor installations or willful abuse in going beyond a safe shot. For this reason you'll find probably all N20 systems are designed to run safely on the rich side. A tuner is going to design his tune a basic nitrous tune to run on the rich side as well in the interest of safety, reliability and ultimately his reputation. To squeeze out the most power safely you need a dyno tune so a/f can be tweaked just for your car.
Second, lean spikes exist but I'm not so sure that it is a simple as getting a tune to correct this. Its seems this primarily the result of how much faster the nitrous moves compared to the fuel (due to the differences in pressure) and the inherent design limitation of returnless fuel systems (response to demand latency). A progressive timer that allows fine tuning of the solenoid activation sounds like the best option with longer nitrous line as the simpler poor man's hack. My guess (based on the years nitrous has been in use on the street) is that if you follow all the basic precautions - colder plugs, premium fuel and are under the max shot by 25 or 50 you'll be fine. At the max spray a tune should be used, if for no other reason as the added safety comes with a performance improvement and that can never be wrong

 

Lol thanks for the link. I had no clue what any of that was before reading that thread. Now I know what all that stuff is that is hooked up to my car, thanks!

Also, like said above lean spikes happen because the nitrous hits so hard that the fuel can't keep up. It is for just a very, very short amount of time but it is still there.

 

Glad I can help you.

I know what causes the lean spike but for a 100 shot there is enough fuel to compensate. As a matter of fact, most kits come richened to prevent this lean spike. 100 shot is NO problem for your engine and you can run with out a tune.

 

Guess my sarcasm didn't show up in my reply. The link was pointless as I know how to hook up nitrous and what everything is to make it function.

I guess this discussion is just something we are going to have to agree to disagree on.

 

I knew it was sarcasm... Guess mine wasn't too visible either.

 

I guess you and I can agree on that we can't pick up each others sarcasm

 

Haha

 

You guys can all run whatever you feel comfortable with... , but if a guy wants to be "safe," he should have it tuned to be certain that his set-up is opperating exactly as intended before he finds out the hard way. Anyone with a 93oct tune will absolutely need to get a custom tune to back the timing off a bit. A few pulls on a dyno to check A/F is a very good idea.

Nitrous is a great bang for the buck mod at the track(it gets real expensive for guys who like to spray on the street), but a custom tune ought to be included in the install.

My 2 cents...

 

No one is advocating being unsafe, we're just trying to clarify what the boundaries of safe are.

You're going to have to rethink this sentence because it doesn't make any sense.