1970 Duster AlterKtion, 4 Link, LS/T56/Turbo and Minitub
Got to pull the bottom end apart Sunday! Drained the oil and ran it through a paint strainer. Nothing. Cut the filter open and nothing until I really spread the element open and deep in the V I found some material. I also checked the oil pump release to make sure that wasnt stuck open.
First I started measuring cam bearings with the bore gauge and they were all checking out. So then I started yanking the rods out. Everything single rod bearing looked beautiful. As I was like oh boy, I noticed one of the rods itself had bearing material on the rod, so I figured it has to be a main bearing! Pulled the first one off... looked great. Pulled the second, third and fourth caps off annddd
They were all smoked. Definitely detonation. So I found the limit with timing and 93 running 11:1 compression.
The crank actually looked okay, but it was already turned .010 under on the mains and rods. I had 2 spare cranks, so I decided to go with a good used standard crank. When I called the machine shop about having it balanced, he offered to do the short block while he had all the other parts, so if he has the time to do it, I said absolutely! Saves me the time of having to do it and measuring all the bearing tolerances etc.
I also signed up for Summit Midwest Drag Week yesterday! Its actually mostly east coast this year! So I have a lot to do and a TON to learn before July! haha. Super excited though!
Got to pull the bottom end apart Sunday! Drained the oil and ran it through a paint strainer. Nothing. Cut the filter open and nothing until I really spread the element open and deep in the V I found some material. I also checked the oil pump release to make sure that wasnt stuck open.
First I started measuring cam bearings with the bore gauge and they were all checking out. So then I started yanking the rods out. Everything single rod bearing looked beautiful. As I was like oh boy, I noticed one of the rods itself had bearing material on the rod, so I figured it has to be a main bearing! Pulled the first one off... looked great. Pulled the second, third and fourth caps off annddd
They were all smoked. Definitely detonation. So I found the limit with timing and 93 running 11:1 compression.
The crank actually looked okay, but it was already turned .010 under on the mains and rods. I had 2 spare cranks, so I decided to go with a good used standard crank. When I called the machine shop about having it balanced, he offered to do the short block while he had all the other parts, so if he has the time to do it, I said absolutely! Saves me the time of having to do it and measuring all the bearing tolerances etc.
I also signed up for Summit Midwest Drag Week yesterday! Its actually mostly east coast this year! So I have a lot to do and a TON to learn before July! haha. Super excited though!