home made propane kit
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Thread: home made propane kit

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    Default home made propane kit

    hey all, i've been getting my parts together for awhile and finally got around to installing it in my little truck.



    i will be getting a 20lb tank, this little one was one i just had sitting around.









    ill just be putting it to a push button on the shifter for now, i really would like to get a limit switch and a pressure switch and run them in series with a master switch on the dash so it just comes on at full throttle at 9+ psi of boost.

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    What kind of boost do you get from it? A lot of people run them to get fuel savings. You are not interested in that?
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    havent had it out on the road yet, im doing it more for power tho on this motor. for fuel savings you need some sort of boost sensing adjustable regulator to have a consant ratio in your engine, i only have an on off valve more like a nitrous system for full load power.

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    so if you want power, why not start with an FMIC and EGR block off plate.

    you could run 3 solenoids, 1 master safety on/off, then T out from there and go to the other 2, in 1 of the lines put a restrictor jet and the other no jet, then connect them back together. so that would give you your power shot, and the other gives you a small amount all the time for fuel economy, it wont adjust for changing boost levels but for a cruse should do the job
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    lots more work for a IC and the egr is disconneted anyways, nothing going through there. my EGT's never hit over 900 yet so im still a ways from needing one.
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    A lot of this is exactly what I have been trying to find out about. Increasing the MPGs is what I'm after ultimately, but if there was also a way to incorporate a nitrous type shot on command that would be the

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    i am going to add my two cents and then ask a question one why not just go to someone that has a fork lift shop and get the fuel system from a tow motor (fork lift) that runs on propane and get all then needed fitting for the system i e heater for the gas then run your switch or configuration that you want now the question why did you put the gas before the turbo arent you worried about the gas being heat to the flash point form the heat that the turbo creates or conducts? thus causing a little mess like exsplosion or am i being overly cauious?

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    i have already seen very few homemade propane setups, but safety was not taken so seriously... but obviously propane into the turbo would be better to be avoided...
    http://formspring.me/kamikazeondrugz

    http://cripplerooster.blogspot.com/ - if you can't read in portuguese (or even spanish that is closely simillar) use the google translate

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    Quote Originally Posted by cRiPpLe_rOoStEr View Post
    i have already seen very few homemade propane setups, but safety was not taken so seriously... but obviously propane into the turbo would be better to be avoided...
    I agree on this one, But have no experience with propane turbo diesels, just forklifts. Just out of curiosity, what are your supply gauges set at, how much pressure do you know how to supply. Id like to have a set up on my 12v, not for fuel supply just a power shot when i need it. could you post you before and after parameters, egt, boost pressure.
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    Also, what kind of timing are you running on the IP? How much does the EGT go up when the propane is added?

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    Propane is a waste of time on IDI engines, it will cause damage from detonation in the prechambers. As a result the amount of fuel that can be safely injected is very small.
    The money would be far better invested in a decent air filter system, VNT turbo or a Myna injection pump.

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    These guys seem to like it:

    http://www.thedieselstop.com/forums/...-3-idi-146055/

    This guy did it:

    http://www.thedieselstop.com/content...ropane%20Setup


    Here's some glowing review for it:

    http://www.dieselperformanceproducts...timonials.html

    Having trouble finding anything about "detonation in the prechambers" Could you give us some specific information on that Jubel?
    Last edited by DieselSchlepper; 01-26-2011 at 08:23 AM.
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    Quote Originally Posted by DieselSchlepper View Post
    These guys seem to like it:
    This guy did it:
    Not all IDI is the same. The 7.3 prechamber is very different from Mercedes, ours has an atomizing ball inside that is constantly glowing hot.

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    if the propane is injected in the air intake, why would it be supposed to damage the prechambers?
    http://formspring.me/kamikazeondrugz

    http://cripplerooster.blogspot.com/ - if you can't read in portuguese (or even spanish that is closely simillar) use the google translate

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    Um, because it goes into the engine....

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    According to some people who have done it, LPG aids performance in limited amounts care has to be exercised not to use too much or it will cause detonation. One guy has done if for several years.

    http://www.superturbodiesel.com/std/...us-t-1061.html
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    Quote Originally Posted by Jubel jubel freu freu View Post
    Um, because it goes into the engine....
    you're always trying to show the things in a way too much more simpler than it really is, but it's not so problematic as you see...
    http://formspring.me/kamikazeondrugz

    http://cripplerooster.blogspot.com/ - if you can't read in portuguese (or even spanish that is closely simillar) use the google translate

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    So its been over a year since this thread started, how did the propane injection end up? Did you get it to work? Power, efficiency?

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    Welcome glassguy
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    Quote Originally Posted by cRiPpLe_rOoStEr View Post
    you're always trying to show the things in a way too much more simpler than it really is, but it's not so problematic as you see...
    Its simple because it is. The intake leads into.....the cylinder, which is connected directly to.....the prechamber, which contains.......the glowing atomizing ball which will ignite the propane on contact and cause detonation.

    The guy that "did it" is simply injecting little enough that he can't hear the detonation over the normal noise of the engine.

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    The OM617 is a different animal. IDI with a preignition prechamber. PLease explain the "glowing ball" a little?
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    Its the ball that spans the middle of the chamber. The injector sprays onto it, when cold it atomizes via impact vaporization. When the engines hot that ball is glowing from frequent combustion around it and vaporizes the fuel with that heat.


    Thats what makes it different from every other IDI diesel.
    Mercedes' design is an actual precombustion chamber, "normal" prechambers are nothing more than swirl chambers; The injector does all the atomization and the prechamber aids in mixing the fuel with the air.


    The only reason MB nozzles work in VW engines is the impact vaporization of the fuel against the chamber wall (similar to when the MB engine is cold).

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    If that ain't cool! I see how it works I think. The fuel charge entering the glowing ball partially burns because there is only so much oxygen there. Then because of the expansion of the gas it forces the rest of the charge out into the main combustion chamber giving it speed and a swirl or some kind of turbulence AND raising the heat, thus aiding combustion. The Common Rail does this in a much more complex way using the computer and multiple injections per stroke with the glow plugs turning on and off in milliseconds. Nice going Mercedes! I could see where a little propane might could help the process with careful tuning.
    Last edited by DieselSchlepper; 02-06-2011 at 07:13 AM.
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    Glowplugs are only on before starting. Propane doesn't help anything, its just more fuel. Turning up the pump will have the same effect without the risk of blowing up the engine.

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    Quote Originally Posted by Jubel jubel freu freu View Post
    Glowplugs are only on before starting. Propane doesn't help anything, its just more fuel. Turning up the pump will have the same effect without the risk of blowing up the engine.
    propane can be just more fuel, but it's easier to ignite and provides a good spark, then reducing an eventual amount of unburnt fuel...
    http://formspring.me/kamikazeondrugz

    http://cripplerooster.blogspot.com/ - if you can't read in portuguese (or even spanish that is closely simillar) use the google translate

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    Quote Originally Posted by cRiPpLe_rOoStEr View Post
    provides a good spark, then reducing an eventual amount of unburnt fuel...
    Incorrect. Heat alone ignites the diesel and the amount burned remains wholly unchanged.

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    I guess IDI is why these engines run so well on WVO and alternative fuels?
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    Quote Originally Posted by Jubel jubel freu freu View Post
    Incorrect. Heat alone ignites the diesel and the amount burned remains wholly unchanged.
    wrong again. gotta have compression and heat to ignite the diesel. and every time I blow a cloud of black smoke out of my truck its unburned fuel. definately not a complete burn.
    Dieselschlepper, I think the reason mercedes do so well is their injection pump is an inline like the p7100, almost indestructable in most cases, along with the "on the verge of too hot" of the IDI setup. they all seem to need way more rad than a DI diesel.
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    Hi, jubel is referring to the "hot bulb" in the prechamber in the IDI heads on the OM617. That actually lights part of the intake fuel charge, within the oxygen limits of the chamber and blows it out into the cylinder.
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    Quote Originally Posted by DieselSchlepper View Post
    I guess IDI is why these engines run so well on WVO and alternative fuels?
    No. No engine runs well on WVO. The injection pump is merely more tolerant of garbage being run through it.

    gotta have compression and heat to ignite the diesel. and every time I blow a cloud of black smoke out of my truck its unburned fuel. definately not a complete burn.
    Wong again. Black smoke is due to excessive fuel injected into the engine when there is a lack of oxygen. No amount of propane injected into your engine under those conditions will increase the amount of diesel burned even in the slightest, in fact injecting propane in that situation would INCREASE smoke by reducing the air:fuel ratio even further!

    Hi, jubel is referring to the "hot bulb" in the prechamber in the IDI heads on the OM617.
    No. The bulb doesn't light the diesel, it atomizes it.

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