Propane backfire?
#1
Join Date: Apr 2005
Location: Port Coquitlam, BC Canada
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Propane backfire?
So, did not see this topic anywhere, my 1977 F-250 400 CI was done by a fellow that used to do propane conversions, it is a dual fuel system.
No brain box or what have you, so he apparently set it up I think to run best on propane, as it is great on propane and will break the wheels loose easier than on gas, gasoline is not as smooth running.
So I imagine it is set up as a compormise system, anyway I have had it where going up hills it has done what I call backfiring, so I was told to take the rotor under the distributor cap and cut one side off, as it is what I call a hammerhead shape and that would stop it, as I guess the thought is that the spark is jumping quicker or something, so I think they said to do it on the following edge.
Anybody ever heard of this?
No brain box or what have you, so he apparently set it up I think to run best on propane, as it is great on propane and will break the wheels loose easier than on gas, gasoline is not as smooth running.
So I imagine it is set up as a compormise system, anyway I have had it where going up hills it has done what I call backfiring, so I was told to take the rotor under the distributor cap and cut one side off, as it is what I call a hammerhead shape and that would stop it, as I guess the thought is that the spark is jumping quicker or something, so I think they said to do it on the following edge.
Anybody ever heard of this?
#2
I'm not sure I understand. Is the assertation here that making the rotor lighter will make it spin faster? I don't think that's going to happen since the rotor is driven off the cam.
If you want your spark happening earlier maybe you should advance the timing a little bit.
If you want your spark happening earlier maybe you should advance the timing a little bit.
Last edited by cookie88; 06-02-2007 at 05:17 PM.
#6
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