440 - First Engine Build Questions

[domdart]

I recently bought a 77 440 that came out of police car. I got it back from the machine shop and I have some questions. It is bored 30 over and the cast crank is ground 10/10. I have the balancer and the converter that came off of it so is it still balanced? If so, do I just have to match the weight of the new pistons with the old? I would like to bring this 190 hp 1977 440 up to 350/375 hp like the earlier 440's. Will taller pistons and a different cam get me there using the original heads? The original pistons were .150 down in the bore. As always, thanks FABO.

 

[413]

It needs to be balanced now. It will not be the same, and the factory balance was not very close.

Does your converter have weights on it? They will have to be removed.

 

[domdart]

Yes, there are weights on the converter.

 

[Newbomb Turk]

I recently bought a 77 440 that came out of police car. I got it back from the machine shop and I have some questions. It is bored 30 over and the cast crank is ground 10/10. I have the balancer and the converter that came off of it so is it still balanced? If so, do I just have to match the weight of the new pistons with the old? I would like to bring this 190 hp 1977 440 up to 350/375 hp like the earlier 440's. Will taller pistons and a different cam get me there using the original heads? The original pistons were .150 down in the bore. As always, thanks FABO.

It’s still balanced. What changed that it would not be balanced?

 

[413]

Do you have the pistons yet? Block gets honed to the actual piston size, not to .030 over.

 

[BSB67]

Yes, match the new piston and pin weights to the old. And you will basically match the factory balance.

You need to make the head and piston decision together as combined they will determine your compression ratio. There are two aftermarket pistons (Speed Pro) that will be close in weight to your original pistons . The 2266 will have a compression distance of 1.99” and will be .080-0.090” in the hole. The 2355 will have a CD of 2.06” and be about 0.020” in the hole and have 7cc valve pockets. Heads will range from 75cc to 90cc and be iron or aluminum.

If in the budget, go right to aftermarket aluminum.

 

[pittsburghracer]

Yes, match the new piston and pin weights to the old. And you will basically match the factory balance.

You need to make the head and piston decision together as combined they will determine your compression ratio. There are two aftermarket pistons (Speed Pro) that will be close in weight to your original pistons . The 2266 will have a compression distance of 1.99” and will be .080-0.090” in the hole. The 2355 will have a CD of 2.06” and be about 0.020” in the hole and have 7cc valve pockets. Heads will range from 75cc to 90cc and be iron or aluminum.

If in the budget, go right to aftermarket aluminum.

Nice!!! Jump that compression up, nice set of 440source heads and aluminum intake, I would consider an aftermarket cam and boom your reached your target.

 

[Muswagon]

It needs to be balanced now. It will not be the same, and the factory balance was not very close.

Does your converter have weights on it? They will have to be removed.

The weights will not be removed...why would they?? It is still a cast crank which needs to be externally balanced.