BiodieselPower
New member
- Joined
- Oct 7, 2009
- Messages
- 113
I realize that most diesel guys are against running propane now because their “buddy” or someone they know or heard of was running propane and melted his motor. Why is it that thousands of guys run it on their trucks and never hurt a thing why others have problems in 500 miles?
I have ran propane on my truck and know lots of people that do and even a farmer that buys brand new combines each year puts it on and have no problems when done properly.
I believe that we have had no problems because it is set up for mileage and not power (still boosts power though). Do most guys just have a problem regulating the amount they put in or what? I’ve heard that running propane raises cly. Pressures, well when cly. Pressure raises so does egt. On the kit I use it has its own egt gauge that can be set to shut down the propane at any temp. This kit is also computer controlled and progressive- you can change the amount of propane going in according to the amount of boost and it can be changes at any boost level 1,2,3,4… psi. Right now I have mine set to shut off at 30 lbs of boost because of all the stories I hear and I really want to make sure I do it right the first time.
My theory is that you need to monitor egt, adding the proper amount of propane will actually LOWER the EGT by 20-40 degrees. Too much pane will increase temps and I would assume also increasing pressure causing multiple problems. Also, I think the main reason only stock or almost stock trucks handle propane is because of the timing. Stock trucks can handle quite a bit of extra timing but the problem is we all increase timing for more power/ mileage. That’s fine to a point-like when we add drugs like propane. Fumigating with propane will actually smooth the burn out because the propane vapor is in the cylinder and there are no spots without fuel such as when running just diesel. This is a good thing, but the total burn time takes less time when adding propane. So when you’re already running 20-30 degrees of timing then you add propane you get peak cyl pressure too early and it will be counter productive and try to push the piston down too soon because the burn was so fast. Basically I believe running propane is like advancing you timing another 5-10 degrees. Here is where some people will say that no the propane is igniting on its own before the diesel is injected, but this is not so diesel fuel has an auto ignition point of 437 degrees F compared to propane’s auto ignition of right around 1000 F. So until cylinder temps reach 1000 degrees propane will not self ignite. So the diesel starts to burn first and it actually ignites the propane.
Basically I think that if timing was left stock or even retarded a little and we inject the proper amount we could safely inject propane on high horsepower diesels as a cheap alternative to pricy NO2. The power gains won’t be as large, but it’s also legal on the street.
I have ran propane on my truck and know lots of people that do and even a farmer that buys brand new combines each year puts it on and have no problems when done properly.
I believe that we have had no problems because it is set up for mileage and not power (still boosts power though). Do most guys just have a problem regulating the amount they put in or what? I’ve heard that running propane raises cly. Pressures, well when cly. Pressure raises so does egt. On the kit I use it has its own egt gauge that can be set to shut down the propane at any temp. This kit is also computer controlled and progressive- you can change the amount of propane going in according to the amount of boost and it can be changes at any boost level 1,2,3,4… psi. Right now I have mine set to shut off at 30 lbs of boost because of all the stories I hear and I really want to make sure I do it right the first time.
My theory is that you need to monitor egt, adding the proper amount of propane will actually LOWER the EGT by 20-40 degrees. Too much pane will increase temps and I would assume also increasing pressure causing multiple problems. Also, I think the main reason only stock or almost stock trucks handle propane is because of the timing. Stock trucks can handle quite a bit of extra timing but the problem is we all increase timing for more power/ mileage. That’s fine to a point-like when we add drugs like propane. Fumigating with propane will actually smooth the burn out because the propane vapor is in the cylinder and there are no spots without fuel such as when running just diesel. This is a good thing, but the total burn time takes less time when adding propane. So when you’re already running 20-30 degrees of timing then you add propane you get peak cyl pressure too early and it will be counter productive and try to push the piston down too soon because the burn was so fast. Basically I believe running propane is like advancing you timing another 5-10 degrees. Here is where some people will say that no the propane is igniting on its own before the diesel is injected, but this is not so diesel fuel has an auto ignition point of 437 degrees F compared to propane’s auto ignition of right around 1000 F. So until cylinder temps reach 1000 degrees propane will not self ignite. So the diesel starts to burn first and it actually ignites the propane.
Basically I think that if timing was left stock or even retarded a little and we inject the proper amount we could safely inject propane on high horsepower diesels as a cheap alternative to pricy NO2. The power gains won’t be as large, but it’s also legal on the street.
oke: