My J5 runs good.... but not perfect. Just after I accelerate, after say climbing a steep bank I can hear it miss a few times. And it's running a bit rich. Plugs are running a bit sooty looking and I see black smoke occasionally when I'm working the machine. It starts really good if the engine is cold but on a warm engine I have to crank the engine 5-6 revolutions before it starts. And it seems to burn 10 - 15% more gas than my buddys J5 all things running equal. The engine has good compression, all new ignition parts and rebuilt B&B carburetor and remanufactured distributor.
I set the timing as per the manual at 5 degree BTC. I talked to a guy at Vintage power wagon who said that 5 degrees BTC is meant for fixed engines like generators or a saw mill but on something you drive they set them up at about 1 degree advanced. He also said gas was much better years ago which effects the timing. My question is where do you 251 Chrysler flat head motor guys set your timing. I haven't messed with anything yet I just noticed these issues when I took the J5 hunting this fall. Just Looking for ideas before I try anything
I set the timing as per the manual at 5 degree BTC. I talked to a guy at Vintage power wagon who said that 5 degrees BTC is meant for fixed engines like generators or a saw mill but on something you drive they set them up at about 1 degree advanced. He also said gas was much better years ago which effects the timing. My question is where do you 251 Chrysler flat head motor guys set your timing. I haven't messed with anything yet I just noticed these issues when I took the J5 hunting this fall. Just Looking for ideas before I try anything