Propane assist for gasoline engine ? - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 06-03-2007, 06:32 AM   #1
Registered Member
 
Join Date: May 2007
Posts: 15
Country: United States
Propane assist for gasoline engine ?

I have another possibly insane thought about using propane along with gasoline in my uhhhhm vehicle (see Yoda 2 in my garage).

PLEASE ANYONE READING - PLEASE DO NOT DO ANYTHING THAT COULD MAKE YOU OR YOUR CAR GO BOOM!!!!!

When I filled up the other day I noticed the the station was selling propane for $2.75 per gallon and gas was $3.05 per gallon. I had never seen propane advertised in a per gallon fasion before, always per pound. When I was leaving I noticed someone putting their filled propane tank in the trunk of their car probably for a BBQ pit or in this area Crawfish boiler.

Driving home and thinking about how I could benefit from the .30 per gallon difference in price I came up with this idea. If you were to inject propane gas at some point into the air going into the engine it would burn it as if it were gasoline.

Next I wondered how the cars computer would handle this. From what I have read about ECMs the amount of gasoline supplied to the engine is based on the oxygen content of the exhaust gases. Everyone help me out here if this is not correct. If this is the case it seems if you added propane in a ratio which was less than needed for the engine to run on just propane the engine would still be able to change the air fuel mix by how much gasoline it dispenses to the engine.

So if you included a valve linked to the trottle you could increase and decrease the amount of propane entering the engine relative to the amount of air entering. While still allowing the computer to do its thing. And reap some of the benefits of using propane.

Please let me have some of your thoughts on this. And also

PLEASE ANYONE READING - PLEASE DO NOT DO ANYTHING THAT COULD MAKE YOU OR YOUR CAR GO BOOM!!!!!
__________________

roadyj is offline   Reply With Quote
Old 06-03-2007, 07:12 AM   #2
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
You can get a conversion kit and run full propane if you so desire,
__________________

SVOboy is offline   Reply With Quote
Old 06-03-2007, 07:21 AM   #3
Registered Member
 
Join Date: May 2007
Posts: 15
Country: United States
Thanks,

I did look up propane conversion kits. I was as usual thinking low cost mods.
roadyj is offline   Reply With Quote
Old 06-03-2007, 09:44 AM   #4
ELF
Registered Member
 
ELF's Avatar
 
Join Date: Jan 2007
Posts: 245
Country: United States
I thought about trying that, but there are only maybe a small gain possible?
also I have other family drive my cars, so there's the potential for mishap. Like some one turning on the propane when the car is off. besides turning the pressure up and down while you drive would get old real fast. Might be a good thing to try on a long trip where you could keep it at a steady pressure.
__________________
ELF is offline   Reply With Quote
Old 06-03-2007, 11:41 PM   #5
Registered Member
 
GasSavers_Ryland's Avatar
 
Join Date: Mar 2006
Posts: 1,325
Country: United States
Send a message via AIM to GasSavers_Ryland
I was looking at the forklift at work today that runs off propane, and couldn't belive how simple it's injection system appears to be, of course I didn't get a chance to take it appart, but it's alot simpler then a normal carburator, or fuel injection.
then I got to looking at a propane generator with a 8hp briggs and straton engine with propane carburator as well, and that looked even simpler, it appears to adjust the richness based off vaccum, high vaccum, low input, low vaccum high input, it appears to be that simple, then just wire in a propane cut off valve in to the ignition or something, so it turns the propane off when the key is turned.
I'm sure that if you are doing it as a hybrid setup with gasoline at the same time that it might give you greater flexiblity in your design, but it sounds very possible to make one that is user friendly for strangers who barrow your car, of course to transport propane you are suposed to have it in an area that is open to the air, not inside a trunk or passenger compartment.
GasSavers_Ryland is offline   Reply With Quote
Old 06-04-2007, 06:29 AM   #6
Registered Member
 
Join Date: Oct 2005
Posts: 682
Country: United States
Propane has less BTU per gallon than gasoline, so the price difference may not make up for the mileage difference.
__________________
Capitalism: The cream rises. Socialism: The scum rises.
Sludgy is offline   Reply With Quote
Old 06-04-2007, 06:53 AM   #7
Registered Member
 
caprice's Avatar
 
Join Date: Feb 2007
Posts: 114
Country: United States
Propane assist, i don't know. But propane exclusively gets worse MPG than gas. It has a much higher octane rating, 104, so that means you could run it in a higher compression engine. Then it may meet, or beat the FE of gasoline. Not to mention, your engine would last longer and the oil would stay clean.

Also I am not familiar, but bulk propane delivery is less, I believe. If you lived in the country, you could get a big storage tank.
__________________
David
85 Chevrolet. 30 MPG or bust!
caprice is offline   Reply With Quote
Old 06-04-2007, 06:54 AM   #8
Registered Member
 
Join Date: Mar 2007
Posts: 1,138
Country: United States
Quote:
Originally Posted by Sludgy View Post
Propane has less BTU per gallon than gasoline, so the price difference may not make up for the mileage difference.
Yep yep yep. I agree. Still it is a fun idea...
__________________
Bill in Houston is offline   Reply With Quote
Old 06-05-2007, 04:57 AM   #9
Registered Member
 
Join Date: May 2007
Posts: 15
Country: United States
Thanks for the comments. I had not taken into account the difference in BTUs per gallon.

I saw threads in here on Hydrogen.

Any other interesting gasses to try?
roadyj is offline   Reply With Quote
Old 06-05-2007, 09:01 AM   #10
Moderator
 
GasSavers_DaX's Avatar
 
Join Date: Oct 2005
Posts: 1,209
Country: United States
Quote:
Originally Posted by Sludgy View Post
Propane has less BTU per gallon than gasoline, so the price difference may not make up for the mileage difference.
Propane was my first idea for an FE mod, waaaaaay before GasSavers.org was a website. As sludgy said, after research I found out it would not be worth it.
__________________

GasSavers_DaX is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
More SMS Requests zbret Fuelly Web Support and Community News 16 02-03-2011 01:09 AM
Incorrect Milage Calcuatlion PatM Fuelly Web Support and Community News 4 07-17-2009 08:21 PM
Missing Fuelup jmonty Fuelly Web Support and Community News 3 05-27-2009 05:10 AM
ECT Analyzer/manual TC lockup GasSavers_Bruce Transmissions and Running Gear 60 04-01-2008 11:37 AM
"active" aero grille slats on 06 civic concept MetroMPG General Fuel Topics 21 01-03-2006 01:02 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 07:53 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.