396/375 hp/motor issues

christopher teed · 04-08-2013, 09:24 PM

thanks for the help so far...removed the carb and checked all the idle circuit for blockage etc.and checked the carb in general ..noticed that the diaphragm front pump... appeared to be sticking.changed it appears to run better...two things i really notice is the first is with the timing light ; at idle or throttle up the timing mark is steady ,then all of the sudden it jumps back about 20 degrees and then moves back to the stationary mark on timing tab this happens about every five seconds,,,the other is the fact that the bullet flat tappet cams is not much above the stock 396/375 cam...it does have a alittle tighter duration and a tight valve lash...but should have a good vacuum right at idle.....have drained the oil and removed the filter and will cut into the filter and see what is up.i live in orlando florida and the motor was dyno tuned on Bo Laws dyno by a guy named Dave Crunes ,Dave used to run stock eliminator years ago

04-08-2013, 09:24 PM	#19
christopher teed Junior Member Join Date: Feb 2013 Posts: 12 Likes: 0 Liked 0 Times in 0 Posts	Re: 396/375 hp/motor issues thanks for the help so far...removed the carb and checked all the idle circuit for blockage etc.and checked the carb in general ..noticed that the diaphragm front pump... appeared to be sticking.changed it appears to run better...two things i really notice is the first is with the timing light ; at idle or throttle up the timing mark is steady ,then all of the sudden it jumps back about 20 degrees and then moves back to the stationary mark on timing tab this happens about every five seconds,,,the other is the fact that the bullet flat tappet cams is not much above the stock 396/375 cam...it does have a alittle tighter duration and a tight valve lash...but should have a good vacuum right at idle.....have drained the oil and removed the filter and will cut into the filter and see what is up.i live in orlando florida and the motor was dyno tuned on Bo Laws dyno by a guy named Dave Crunes ,Dave used to run stock eliminator years ago