Rebuilt top end of engine now carb idles much higher?Please help
So I finally had to time to address the issues I had to fix after relocating my dart in my move. So I have a 67 dart with 383 four speed. I swapped out the cast iron 915 heads for edelbrock rpm performers. Do to time constraints I previously put the edelbrock intake and speed demon carb back on to move the car. Now that I have a little time I decided to fix a couple asthetic things on the car. The car previously idled at around 1000 rpm. If I remember correctly it has a bit of an aggressive cam 484 lift 284 duration. I took off and reassembled the valley pan, edelbrock intake and demon carb and throttle linkage and I was careful to really clean all mating surfaces and torquing intake carefully but now the car idles around 1500 rpm. Also I checked and adjusted the timing. It has an upgraded electronic distributor and the timing is advanced to 36deg. It seemed to run the best at that setting after adjusting it. I tried to adjust the carburetor idle screw down but it won’t adjust any lower than what it is set at. I didn’t set up the original carb and throttle linkage. I took some close up photos of the linkage. My concern is two fold. Is the higher idle a result of a vacuum leak somewhere how can I figure out the problem and lower the timing to a more comfortable 800-1000rpm? I included some photos. Thanks
Carl
So I finally had to time to address the issues I had to fix after relocating my dart in my move. So I have a 67 dart with 383 four speed. I swapped out the cast iron 915 heads for edelbrock rpm performers. Do to time constraints I previously put the edelbrock intake and speed demon carb back on to move the car. Now that I have a little time I decided to fix a couple asthetic things on the car. The car previously idled at around 1000 rpm. If I remember correctly it has a bit of an aggressive cam 484 lift 284 duration. I took off and reassembled the valley pan, edelbrock intake and demon carb and throttle linkage and I was careful to really clean all mating surfaces and torquing intake carefully but now the car idles around 1500 rpm. Also I checked and adjusted the timing. It has an upgraded electronic distributor and the timing is advanced to 36deg. It seemed to run the best at that setting after adjusting it. I tried to adjust the carburetor idle screw down but it won’t adjust any lower than what it is set at. I didn’t set up the original carb and throttle linkage. I took some close up photos of the linkage. My concern is two fold. Is the higher idle a result of a vacuum leak somewhere how can I figure out the problem and lower the timing to a more comfortable 800-1000rpm? I included some photos. Thanks
Carl
