wanted to know if injecting propane affects timing and how much. I'm sure it depends on how much you inject but just wanted to gather some more information on the topic. I have searched but havn't found a lot of info. Anyone think they know?

 

Don't know how propane would affect timing but it does affect cylinder pressure so if you have a stock head gasket you have a good chance of blowing it. From what I've heard you shouldn't use propane unless you have head studs and a fire ringed head.