70 Dart Triple Treat Build
New alternator didn't fix the charging issue, ended up being 2 more loose connections. Back to trying to tune this carb...AFR gauge locked up and stayed in preheat for the o2 sensor and fried that. Fixed that by recalibrating 4 times. Then rejetted the carb 1 more step up and turned the mixture screws in to level out the idle AFR while richening up the 25-75% acceleration AFR. Finally got the car running the way I'd like so I decided to go for a rip up the road an back. I was told by my engine builder that the cam and valvetrain we're running would be good up to 7000RPM...well floated the valves at 6500. Didn't have any ill effects so I kept up the "spirited driving" down a bit lower at 6k which is the top of the working range of the cam. Pulled into the driveway and the car was idling really rough and smoking out the passenger side exhaust (true duels). Pulled the valve covers to find a push rod out of place (again) so I went to put it back in but it wouldn't stay in place and kept dropping down. Pulled the intake and found a lifter blew apart. Luckily all the pieces were laying in the oil gallery and didn't rattle around the engine. Pulled the lifter and the roller was still there so the cam wasn't damaged. Bought new lifters, all but 1 fit...looks like one wasn't machined properly. I double-checked by trying it in different bores and tried others in the same bore, all of which fit. So sending back the bad lifter for a new one tomorrow...
New alternator didn't fix the charging issue, ended up being 2 more loose connections. Back to trying to tune this carb...AFR gauge locked up and stayed in preheat for the o2 sensor and fried that. Fixed that by recalibrating 4 times. Then rejetted the carb 1 more step up and turned the mixture screws in to level out the idle AFR while richening up the 25-75% acceleration AFR. Finally got the car running the way I'd like so I decided to go for a rip up the road an back. I was told by my engine builder that the cam and valvetrain we're running would be good up to 7000RPM...well floated the valves at 6500. Didn't have any ill effects so I kept up the "spirited driving" down a bit lower at 6k which is the top of the working range of the cam. Pulled into the driveway and the car was idling really rough and smoking out the passenger side exhaust (true duels). Pulled the valve covers to find a push rod out of place (again) so I went to put it back in but it wouldn't stay in place and kept dropping down. Pulled the intake and found a lifter blew apart. Luckily all the pieces were laying in the oil gallery and didn't rattle around the engine. Pulled the lifter and the roller was still there so the cam wasn't damaged. Bought new lifters, all but 1 fit...looks like one wasn't machined properly. I double-checked by trying it in different bores and tried others in the same bore, all of which fit. So sending back the bad lifter for a new one tomorrow...