JWKetron
Active Member
Good day,
I recently purchased a very low milage 1975 fury custom 2-door. The second owner installed an edlebrock four barrel intake manifold to match the engine as well as an aftermarket 4-barrel edlebrock carb with electronic choke. He removed most all emissions controls prior to my purchase. Stock 1975 timing with a factory set up 2-barrel caeb indicates 2 degrees before TDC. Looking toward 1977 when Plymouth offered a 4-barrel set up for the 318, the 1977 data shows 10 degrees before TDC. I have noticed a valve chatter inside the engine under load while driving within a certain rmp/load limit traveling down the road. The noise goes away as I let up on the gas. Does not chatter at idle. My engine is currently timed for the 2 degree mark, I have checked it. I now have a 4 barrel carb on it. Could changing the timing help compensate for the 4 barrel? I want to cure the valve chatter since I am now running a entirely diffrent carburetor therfore now some-what modified. The engine is a stock civilian 318 passenger car engine. Only mod was the intake and carb as well as air cleaner. Looking to cure the valve chatter to keep the low milage engine in good shape and preserved. Do I need to change the timing with the 4 barrel installed?
Thanks,
Jon
I recently purchased a very low milage 1975 fury custom 2-door. The second owner installed an edlebrock four barrel intake manifold to match the engine as well as an aftermarket 4-barrel edlebrock carb with electronic choke. He removed most all emissions controls prior to my purchase. Stock 1975 timing with a factory set up 2-barrel caeb indicates 2 degrees before TDC. Looking toward 1977 when Plymouth offered a 4-barrel set up for the 318, the 1977 data shows 10 degrees before TDC. I have noticed a valve chatter inside the engine under load while driving within a certain rmp/load limit traveling down the road. The noise goes away as I let up on the gas. Does not chatter at idle. My engine is currently timed for the 2 degree mark, I have checked it. I now have a 4 barrel carb on it. Could changing the timing help compensate for the 4 barrel? I want to cure the valve chatter since I am now running a entirely diffrent carburetor therfore now some-what modified. The engine is a stock civilian 318 passenger car engine. Only mod was the intake and carb as well as air cleaner. Looking to cure the valve chatter to keep the low milage engine in good shape and preserved. Do I need to change the timing with the 4 barrel installed?
Thanks,
Jon