What are the differences and is there an advantage to one over the other?

Tony

 

okay...
NOS is a company that makes Nitrous kits and accessories...

It is possible to inject propane into the cylinders to make some monster torque numbers. A few viper guys us it to make torque numbers in the 900's. The theory behind it is, propane is extremely flamable, and burns extremely slow. So this would allow you to increase timing since the slow buring propane would prevent detonation. FWIW... I would not do it... Even though the viper guys can getaway with it.. The ls1/6 rings cannot take that much cylinder pressure and you will get blowby....

 

If you're referring to the "Truck" TNT. You can find out more @ http://www.bullydog.com




[Modified by Maverick, 12:45 PM 9/21/2003]

 

NOS is just another word for Nitrous Oxide System, either the brand or type: wet or dry. NOS-propane is a combination of nitrous and propane. When you run nitrous all by itself, you usually have to run higher octane fuel if you really up the shot or use a dry or direct port system so that you don't encounter a lean situation. Boom. In a wet system, it's not that big of an issue. Instead, puddling of the nitrous in the intake manifold can cause problems especially on the LS1/LS6... More boom. What the NOS-propane combination allows you to do is run direct port, at a very high shot because propane is very high octane--around 130-140. When you run direct port, which is nitrous fed into each cylinder, you run the risk of running lean because you are relying on the stock fuel rail, which has to deliver extra fuel or higher octane fuel to go with the increase in air from the nitrous. With the propane, the engine's fuel system is not asked to carry the extra burden. Plus, propane runs cleaner with the aforementioned higher octane. As far as I know, only Vipers are running this combination. Hope this helps. :seeya

 

Let me say a few things to straigten you guys out.....

First slow burning...extremely flammable....seems a little contradictive :)

Propane has a higher octane, but not anywhere near 130......try 104 Octane. Octane is a resistance to detonation = slow burning.

The reason you use propane has nothing to do with a direct port...it is cleaner, cheaper, safer...period!

The amount you spray has to do with how long you will last, not the cylinder pressure. Some say an increase in torque.....but that changes with pressure when using propane.

I personally am finishing my dual stage 300 on my vette with the propane enrichment. The real benefits are the obvious, no need for additional fuel system, larger injectors, or upgraded fuel pump. Because of its resistance to detonation (higher octane) it makes it that much safer to use!!!!!!

You do not want a fogger setup (direct port) as that is the opposite of what its real benefit is....cheaper. Propane and nitrous atomize very well because they are both vapor exiting the tip. This allows for even distribution through the throttle body.....no need for additional nozzles.

Where do you guys get your info????? Seems you should do a little more research. Guys that may benefit from such a setup, could turn their heads, due to misleading info as posted.

 

Also let me say there are theoretically 2 types of nitrous systems:

1. Dry - Nitrous only with the extra fuel added by injectors of the motor.

2. Wet - Nitrous with a fuel enrichment. To be added with an additional solenoid and a seperate source of fuel other then the normal injectors.

In this case, and our cars, propane is the additional source of fuel (#2 or a wet system). That simple. However diesel guys use it by itself much like we would use a dry nitrous setup;)

 

what type of prices are we looking at for a propane-nitrous setup? Is it fairly easy to install?

Greg

 

As simple as instaling a wet nitrous system. Without all the headache from installing a different fuel system or larger pump (on larger shots).

I am going to finish this one up and do all the testing with a buddy. I hope to sell the system as an upgrade to any current system (wet or dry) for under 500.00. Small price to pay for the added convenience and safety:) That includes the solenoid, pill sizes, line and tank, fittings, and gauge;)

 

I want to buy one, can I be first? Thanks for the info. Let us know when the testing is done. :thumbs:
Tony

 

Well i have to say that propane DOES work just depends on your application... I have used it on my 86 svo mustang to make some unbelievable numbers with stock injectors and intercooler on a 2.3 4 banger... It works but was hard to tune it in but once it is right it was awesome... It allowed me to run 10psi more and 7 more degress of initial timing...

 

Alright.... Boys and Girls!

First test:

Pilled at a theoretical 75 shot

Couple of problems with my solenoids (I have had them for quite some time and they need to be replaced/rebuilt). The intial testing was done, and all I can say is....WOW:)

I can confirm that the torque increase is out of this world, but does change with pressure/pill size (on the propane side). I have learned a whole bunch already and did tons of research before I even tried any of this.

The remainder of the tuning will be done on Tuesday of next week and ready to go by Wen. - Thurs. forsure by the end of next week. I had to put it off a week to make time to get other things ready on the car, and do a friend a couple of favors

;)