Compression test??
I was hoping to let Bobby at BJR racing build be a nice 360 but I can't afford it right now. That would be icing on the cake but I have spent about $6000 or so on the car this year. Bobby is a super guy and I wouldn't want anyone else build my motor but him. I will get to it this coming year.
I have been concerned about the compression numbers and thought surely they should be higher that what they are. Like 125 psi or more.
What I have is a 64 273 4bl carb non adjustable rockers with a Mopar .474/.474 cam. The motor was rebuilt in July of 06 is what the previous owner has told me. It had a .420 intake lift cam in it but it was to mild so I changed the cam to the Mopar. I did a compression test on the motor with the .420 cam and the readings were just a shade higher than what I have now. That was a year ago. I don't know what compression I'm running or bore size since I have not removed a head. I did a compression check on the engine after I warmed it up and the readings are low. I added oil to each cylinder and there was no change from the first reading. Here they are:
1= 105 2= 115
3= 90 4= 115
5= 100 6= 95
7= 89 8= 100
It looks like I need to pull the heads and see what is going on. Also find out what bore size and compression ratio I'm running.
I know it's a 273 and I'm not going to get wheel standing horsepower out of it but just want to know why such low readings?
Tell me whats the best move to make.
I was hoping to let Bobby at BJR racing build be a nice 360 but I can't afford it right now. That would be icing on the cake but I have spent about $6000 or so on the car this year. Bobby is a super guy and I wouldn't want anyone else build my motor but him. I will get to it this coming year.
I have been concerned about the compression numbers and thought surely they should be higher that what they are. Like 125 psi or more.
What I have is a 64 273 4bl carb non adjustable rockers with a Mopar .474/.474 cam. The motor was rebuilt in July of 06 is what the previous owner has told me. It had a .420 intake lift cam in it but it was to mild so I changed the cam to the Mopar. I did a compression test on the motor with the .420 cam and the readings were just a shade higher than what I have now. That was a year ago. I don't know what compression I'm running or bore size since I have not removed a head. I did a compression check on the engine after I warmed it up and the readings are low. I added oil to each cylinder and there was no change from the first reading. Here they are:
1= 105 2= 115
3= 90 4= 115
5= 100 6= 95
7= 89 8= 100
It looks like I need to pull the heads and see what is going on. Also find out what bore size and compression ratio I'm running.
I know it's a 273 and I'm not going to get wheel standing horsepower out of it but just want to know why such low readings?
Tell me whats the best move to make.