Go Back   Ford Truck Enthusiasts Forums > Misc. > Alternative Fuels, Hybrids & Mileage
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-23-2007, 12:11 AM
snipAR-15 snipAR-15 is offline
Senior User
 
Join Date: Nov 2005
Posts: 246
snipAR-15 is starting off with a positive reputation.
Bi-fuel 4.9L?

I have a 4.9L gasoline only engine in my 1996 ford f150. I also heard there is a bi-fuel model made of my engine. How hard would it be to retrofit the euipment to run propane and how much $$$?


Thank you.
Reply With Quote
  #2  
Old 10-24-2007, 03:34 PM
gasman6674's Avatar
gasman6674 gasman6674 is offline
Elder User
 
Join Date: Apr 2002
Location: Greenwood In. USA
Posts: 815
gasman6674 is starting off with a positive reputation.
Starting from scratch all new equipment and tank $3000-4000
If you can locate a used tank (biggest expense) and some take-off rebuildable euipment you might get by for less than a grand. There are some factors to consider on a older unit so if you decide to continue let me know.
Regards
Gasman
__________________
Jim England
Do you have Gas? Propane Exceptional Energy
2015 F350 6.2L 2 WD CCLB 4.30 Dually Vermillion Red
2012 Escape Ltd FWD,2004 Escape Ltd FWD,2012 Ridgeline by Yellowstone Fifth Wheel, (1996 F350 7.3L CCLB DRWFor Sale(2005 Explorer Sport Trac 2WD SOLD)
Reply With Quote
  #3  
Old 10-26-2007, 05:59 PM
RedRum'05 RedRum'05 is offline
Freshman User
 
Join Date: Feb 2007
Posts: 34
RedRum'05 is starting off with a positive reputation.
Propane 4.9L

I have been curious on how to build mine as a full propane engine, i have bought a Road Demon Jr. 525cfm carburator so far for my modifcations, but still need an intake to fit it. The engine is in an '85 Bronco...are there any guide lines as to what compression i should use? I would'nt mind going through getting the tanks and certain things but it seems hard to find info as many people don't go with propane as a fuel.

Thanks for any of your help!
Reply With Quote
  #4  
Old 11-26-2007, 07:38 PM
fraso fraso is offline
Senior User
 
Join Date: Apr 2006
Location: Fort Erie, ON
Posts: 144
fraso is starting off with a positive reputation.
Bi-fuel fumigation conversion kits are available for your engine. Technocarb makes one specifically for the Ford 4.9L engine. You also try fitting an Impco system and a Model 225 would probably work well and a Model 200 might fit a bit easier.

There are universal propane injection kits available but likely not in the USA due to EPA certification. Prins, EcoFuel, and Technocarb are common in Canada. You can also install a DIY bi-fuel propane injection parts package on your fuel-injected engine. This would work better than installing a propane mixer upstream of your throttle body.

If you're building a full propane engine, you won't be needing the Road Demon Jr. The Impco Model 225 would fine if you kept the revs low or you could try the Model 425. Many people like the OHG X-450 (Woodward CA475) better than the Impco 425. A pricier option is the Technocarb 4bbl off-road carburetor.

Keep the CR below 11:1 (preferably below 10.5:1) for best reliability. See Propane Best Practices.
Reply With Quote
  #5  
Old 12-16-2007, 08:02 PM
snipAR-15 snipAR-15 is offline
Senior User
 
Join Date: Nov 2005
Posts: 246
snipAR-15 is starting off with a positive reputation.
Quote:
Originally Posted by fraso
Bi-fuel fumigation conversion kits are available for your engine. Technocarb makes one specifically for the Ford 4.9L engine. You also try fitting an Impco system and a Model 225 would probably work well and a Model 200 might fit a bit easier.

There are universal propane injection kits available but likely not in the USA due to EPA certification. Prins, EcoFuel, and Technocarb are common in Canada. You can also install a DIY bi-fuel propane injection parts package on your fuel-injected engine. This would work better than installing a propane mixer upstream of your throttle body.

If you're building a full propane engine, you won't be needing the Road Demon Jr. The Impco Model 225 would fine if you kept the revs low or you could try the Model 425. Many people like the OHG X-450 (Woodward CA475) better than the Impco 425. A pricier option is the Technocarb 4bbl off-road carburetor.

Keep the CR below 11:1 (preferably below 10.5:1) for best reliability. See Propane Best Practices.
Will running propane effect the comp? If so, how would I adjust the computer to run Propane?
Reply With Quote
  #6  
Old 04-08-2008, 07:47 PM
RedRum'05 RedRum'05 is offline
Freshman User
 
Join Date: Feb 2007
Posts: 34
RedRum'05 is starting off with a positive reputation.
Quote:
Originally Posted by snipAR-15 View Post
Will running propane effect the comp? If so, how would I adjust the computer to run Propane?
From the research that I've done, with Fuel Injected Engines you would need a custom tune for it to properly work.
Reply With Quote
  #7  
Old 04-08-2008, 09:07 PM
fraso fraso is offline
Senior User
 
Join Date: Apr 2006
Location: Fort Erie, ON
Posts: 144
fraso is starting off with a positive reputation.
Aftermarket propane conversion kits have no effect on the OEM computer. However, these systems require a working EFI system to operate. The propane computer intercepts the gasoline injector signal, modifies it, and then sends it to the propane injectors. The signal modification is done with a fuel map that relates the signal modification (a multiplication factor) to gasoline injector pulse width and RPM. If the the multiplication factor is correct, the fuel trims on propane are identical to those on gasoline.

While increasing the CR will give an improvement to fuel efficiency, it is not required. Injection systems typically have propane fuel economies of around 90% of the gasoline economy. This is better than the BTU ratio (~75%) because the OEM computer will automatically advance the timing due to the absence of engine knock (propane has an octane rating of 104).
Reply With Quote
Old 04-08-2008, 09:07 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Misc. > Alternative Fuels, Hybrids & Mileage

Tags
49, 49l, bi, bifuel, conversion, engine, f150, faster, ford, fuel, impco, kits, make, propane, running, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 11:50 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup