smartken22
U.S. Navy Senior Chief
OK guys, sorry for the long delay in updates, but I was on det to San Diego. Here is the latest and I am making progress:
1) Jetting on the carb was returned to the original settings
2) The bushing in the MSD distributor was removed and a 10 degree was installed.
3) I set the initial timing to 24 degrees and the motor is very happy right now. I verified total at 3000 rpms and it reads 34 with no detonation or pinging. I tried advancing all the way to 34 degrees initial and the distributor never kicked back as stated. It was happy there as well with no detonation or pinging. Right now I backed it down to 24 degrees initial until I get further guidance.
4) Took the car on a test drive and throttle response was very snappy, power was there and there was no stumble at low speeds at all. I took readings from the AFR Wideband during my drive at highway speeds. Here are the results:
- Idle (800 rpms): 14.5 to 14.7
- 1500: 12.5 to 12.8
- 2000: 12.2 to 12.5
- 2500: 12.0 to 12.3
- 3000: 11.8 to 11.9
- 4000: 11.9 to 12.3
5) I am thinking that I need to jet down based on the rich AFR readings, but I am not going to pull that trigger till I hear from you all. My only concern now is that if you do tell me to jet down, I am going to get that low speed stumble back. Thanks for all the assistance.
Ken
1) Jetting on the carb was returned to the original settings
2) The bushing in the MSD distributor was removed and a 10 degree was installed.
3) I set the initial timing to 24 degrees and the motor is very happy right now. I verified total at 3000 rpms and it reads 34 with no detonation or pinging. I tried advancing all the way to 34 degrees initial and the distributor never kicked back as stated. It was happy there as well with no detonation or pinging. Right now I backed it down to 24 degrees initial until I get further guidance.
4) Took the car on a test drive and throttle response was very snappy, power was there and there was no stumble at low speeds at all. I took readings from the AFR Wideband during my drive at highway speeds. Here are the results:
- Idle (800 rpms): 14.5 to 14.7
- 1500: 12.5 to 12.8
- 2000: 12.2 to 12.5
- 2500: 12.0 to 12.3
- 3000: 11.8 to 11.9
- 4000: 11.9 to 12.3
5) I am thinking that I need to jet down based on the rich AFR readings, but I am not going to pull that trigger till I hear from you all. My only concern now is that if you do tell me to jet down, I am going to get that low speed stumble back. Thanks for all the assistance.
Ken