does propane injection actually increase fuel mileage??? if so how does it??? and by about how much???

 

Glad to see you've decided to follow the forum guidelines this go round

LP has been said to help burn off the extra fuel in the cylinders and real MPg have been somewhat disputeable. Not to mention the cost of the kit, cost of the tank, cost of filling the tank, and the gains have never really been enough for me to pull the trigger.

Cowboy Steve

 

if you get the automatic kits then yes it will give a small increase in both power and economy. but if you just get the kit set-up as a nitrous kit would be then no it would not help.

 

what if a person jerry rigged it up where i could turn the propane on and then turn the fuel off???

 

and i did not read the guidelines... but i went by what i thought was common since... lmfao...

 

Dont think ive ever heard of anyone doing that before. What about you Coon?

Cowboy Steve

 

around here i will afro engineer anything as long as it works... and it seems like to me that it would work...

 

I dont think that it would run on straight propane but im not positive.

Cowboy Steve

 

well it would prolly be more expensive anyways right???

 

Most likely

Cowboy Steve

 

well i guess i will just burn fuel for now... maybe experiment with bio... and i got another question my truck smokes while cranking but will not start would that be the realy or the glowplugs thereselves??? and with just a shot of ether it will fire up...

 

I played with this a few times with a setup I built myself.
I used a Hobbs pressure switch to open and close the propane valve off of a propane fuel fork lift.
I made an orifice and fumigation tube that I installed in the air intake to the air cleaner.
Use a two stage acetylene regulator to drop the pressure supplied from a BBQ tank.
I also had a master arm switch to shut everything down manually.

The cost as tested was under 100 dollars, but I did have most of the stuff I used laying around in my shop.
Hobbs switch from NAPA was 25 dollars.
Propane rated 12 volt solenoid valve was 50 dollars at the local LPG dealer.
Fuel rated hose, 1/4" copper tubing, brass fittings, wire, hose clamps and regulator were all from my shop.

Since any black smoke clears when the propane flows, the engine is more efficient at high throttle applications and does make more power.
Yes you can feel the propane kick in when the valve opens.

That was what I noticed at heavier propane fumigation levels.

Since this was a single level system it was more suitable as a power increaser, but I did not leave it in long enough to really tune it for smaller amounts of propane trying to increase the MPG.
My big problem was the BBQ tank made my dump bed usless, I needed the dump more than I need the propane.
Given the cost of fuel now, this may have to be given another chance though.

From what I have seen looking at prices, given the cost of a Manchester frame mounted tank and the remote fill (over 400 dollars) it would take a long time to see any savings from MPG increases.
Also the Power Shot 2000 system that varies the amount of propane flowing based on boost pressure would probably be the system needed to see any MPG increase and still be able to take advantage of the power increase unless you went with multiple Hobbs switches and regualtors or orifice sizes.
The Power Shot 2000 costs more (I found one for around 650 dollars) than the tank does, so now the cost is more than doubled.

And still to this day I am not sure, you may just be changing from diesel to propane for a fuel.

 

Pane allows more of a complete burn of the #2. Its the reason for less smoke.
The use of large amounts of pane will cause detonation and motor damage.
Small amounts of pane is OK.

Bill

 

i think the 2000 system is the one i was reading on in diesel power magizine

 

well i used to have pane to and when i did from time to time it would black smoke more... but you had to catch it just right...