propane vs water injection - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Project_Slipangle · 04-24-2006, 08:05 PM

i understand that propane injection is primarily used for diesels but ive been using the old "search" button^^ and it seems like people are missing the point of propane injection(i think...or maybe i am...). ok well when it comes to gas, isnt the main purpose of using propane to boost the octane rating so you can run much higher boost levels safely? i mean, its not used (like diesel) just to boost the power. right? just the octane rating...right?

and for water injection, it seems it kind of defeats its own purpose(please correct me if im wrong.) it way of reducing detenation is by cooling the combustion chamber, so you can turn up the boost. but at the same time its not the octane thats being raised, just cooled, so power producing heat is absorbed.

Project_Slipangle · 04-25-2006, 08:11 PM

...not a popular subject?

breakindrifts · 04-25-2006, 08:17 PM

Why are you talking about propane water injection, its completly pointless to do on a KA/SR/whatever.

How about forgetting about customizing some stupid water/propane whatever the fuck you are talking about and just strengthening engine internals to hold more boost, simple.

Project_Slipangle · 04-25-2006, 08:29 PM

hmmm well lets think about htis one dip shit. cost of water vs. cost of fully building a motor. pull your head out of your ass

***S14DB*** · 04-25-2006, 08:34 PM

You really need to read more about each subject before asking questions cause it seems that you have no concept of ether.

turtl631 · 04-25-2006, 08:37 PM

Lots of cars use water or alcohol injection to run higher boost than they woudl be able to on pump gas, higher timing than they should be able to on pump gas, or a little of both. Propane injection is kind of risky for track or street use; with the number of crashes from drifters on streets and on the track, I would never recommend that anybody on zilvia add a tank of pressurized flammable gas to their car. Alcohol...yea, not a bad idea. You'll find more info on grand national, subaru, etc. forums than on these.

Project_Slipangle · 04-25-2006, 08:40 PM

Quote:

Originally Posted by S14DB

You really need to read more about each subject before asking questions cause it seems that you have no concept of ether.

then elaberate...thats why i asked. to become informed.

Maeda · 04-25-2006, 09:19 PM

I'm actually agree-ing with s14db for once.

Ask and ye'shall recieve but next time search better (try google for this broad subject).

Propane and water have nothing to do with raising the octane of your fuel.
They have to do with lower combustion temperature far enough so that your low octane fuel does not preignite due to residual heat.

Cost of a properly implemented water/alc etc system runs at a price that you may as well spend a little extra and get things done right. You don't have to go crazy, just some pistons and a nice hone.

What happens when you run out of your liquid of choice midboost? You explode.
Plus it doesn't allow you to run MORE boost safely, it just prevents detonation. It's an added just in case measure at best.

Maeda · 04-25-2006, 09:21 PM

Look its like magic.
http://www.rallycars.com/Cars/WaterInjection.html
Google + 30 seconds of my time.

You owe me a pack of cigarettes.

Ricks15 · 04-25-2006, 09:33 PM

Like allways the dudes with madd respect allways tell the Newbs search search and search just be blut and give him a damn answer.:ghey:

04-24-2006, 08:05 PM	#1
Project_Slipangle Join Date: Mar 2006 Location: harrison Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	propane vs water injection i understand that propane injection is primarily used for diesels but ive been using the old "search" button^^ and it seems like people are missing the point of propane injection(i think...or maybe i am...). ok well when it comes to gas, isnt the main purpose of using propane to boost the octane rating so you can run much higher boost levels safely? i mean, its not used (like diesel) just to boost the power. right? just the octane rating...right? and for water injection, it seems it kind of defeats its own purpose(please correct me if im wrong.) it way of reducing detenation is by cooling the combustion chamber, so you can turn up the boost. but at the same time its not the octane thats being raised, just cooled, so power producing heat is absorbed.

04-25-2006, 08:17 PM	#3
breakindrifts Zilvia FREAK! Join Date: Apr 2005 Location: Agoura Hills, CA Age: 36 Posts: 1,006 Trader Rating: (0) Feedback Score: 0 reviews	Why are you talking about propane water injection, its completly pointless to do on a KA/SR/whatever. How about forgetting about customizing some stupid water/propane whatever the fuck you are talking about and just strengthening engine internals to hold more boost, simple. __________________ [

04-25-2006, 08:34 PM	#5
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	You really need to read more about each subject before asking questions cause it seems that you have no concept of ether. __________________ Comments should be taken as Opinions not as Statements of Fact

04-25-2006, 09:19 PM	#8
Maeda Nissanaholic! Join Date: Dec 2002 Location: Camp Snake Bite, CA RIP Posts: 2,356 Trader Rating: (0) Rides Gallery: Maeda Feedback Score: 0 reviews	I'm actually agree-ing with s14db for once. Ask and ye'shall recieve but next time search better (try google for this broad subject). Propane and water have nothing to do with raising the octane of your fuel. They have to do with lower combustion temperature far enough so that your low octane fuel does not preignite due to residual heat. Cost of a properly implemented water/alc etc system runs at a price that you may as well spend a little extra and get things done right. You don't have to go crazy, just some pistons and a nice hone. What happens when you run out of your liquid of choice midboost? You explode. Plus it doesn't allow you to run MORE boost safely, it just prevents detonation. It's an added just in case measure at best. __________________

04-25-2006, 09:21 PM	#9
Maeda Nissanaholic! Join Date: Dec 2002 Location: Camp Snake Bite, CA RIP Posts: 2,356 Trader Rating: (0) Rides Gallery: Maeda Feedback Score: 0 reviews	Look its like magic. http://www.rallycars.com/Cars/WaterInjection.html Google + 30 seconds of my time. You owe me a pack of cigarettes. __________________

04-25-2006, 08:11 PM	#2
Project_Slipangle Join Date: Mar 2006 Location: harrison Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	...not a popular subject?

04-25-2006, 08:29 PM	#4
Project_Slipangle Join Date: Mar 2006 Location: harrison Posts: 22 Trader Rating: (0) Feedback Score: 0 reviews	hmmm well lets think about htis one dip shit. cost of water vs. cost of fully building a motor. pull your head out of your ass

04-25-2006, 08:37 PM	#6
turtl631 Zilvia Addict Join Date: Aug 2004 Location: Milwaukee WI Posts: 900 Trader Rating: (3) Feedback Score: 3 reviews	Lots of cars use water or alcohol injection to run higher boost than they woudl be able to on pump gas, higher timing than they should be able to on pump gas, or a little of both. Propane injection is kind of risky for track or street use; with the number of crashes from drifters on streets and on the track, I would never recommend that anybody on zilvia add a tank of pressurized flammable gas to their car. Alcohol...yea, not a bad idea. You'll find more info on grand national, subaru, etc. forums than on these.

04-25-2006, 09:33 PM	#10
Ricks15 Nissanaholic! Join Date: Apr 2005 Location: Los Angeles, CA Age: 39 Posts: 1,661 Trader Rating: (1) Feedback Score: 1 reviews	Like allways the dudes with madd respect allways tell the Newbs search search and search just be blut and give him a damn answer.:ghey: __________________