Moly rings but not torque plate honed
Yes, the cylinders need to be round.
I don't buy that the only way to hone is with a torque plate. Many engines have been made with blocks machined without torque plates that have lasted hundreds of thousands of miles. ie. the car companies do not bore and hone with torque plates and their cars go thousands of miles....
It is how good the machine work is done. If the bores are machined properly, they will hold up. Unless the block has become so weak that torquing the heads will distort the bores too much, in that case the block was no good to begin with.
Boring and honing with torque plates is a great idea. But is good to do if you have the money and need, but is not necessary for a street driven engine... For a race engine, yes...
Who is to say that the 413 in the picture was machined properly. How good was the machinist? And what condition was the machine in?
What matters is if the bore is round when the heads are on. Finish is secondary. Rings can't seal to bores that arent round and if they "wear in"...you have other issues by then.
The big Chrylsers move around quite a bit, if they don't have a plate to hone your block you might as well burn your money.
Here's an example of a 413 that was honed without a plate and had less than 1500 miles on it. Notice the wear on the ring, it only makes contact (seals) in certain areas. This engine was using 1qt of oil in 500 miles.
Yes, the cylinders need to be round.
I don't buy that the only way to hone is with a torque plate. Many engines have been made with blocks machined without torque plates that have lasted hundreds of thousands of miles. ie. the car companies do not bore and hone with torque plates and their cars go thousands of miles....
It is how good the machine work is done. If the bores are machined properly, they will hold up. Unless the block has become so weak that torquing the heads will distort the bores too much, in that case the block was no good to begin with.
Boring and honing with torque plates is a great idea. But is good to do if you have the money and need, but is not necessary for a street driven engine... For a race engine, yes...
Who is to say that the 413 in the picture was machined properly. How good was the machinist? And what condition was the machine in?
