Re: Compression ratio of 327 head; year of the engine block?
Posted by HH56 On 2016/8/29 20:56:11
On the block check the motor number on a pad just below the head and above the starter. The 359 will start M6xxxxx. If the number starts any other way it is a different engine or year. Here is a portion of the engine serial number chart which is available for download in the literature section.
On the heads I don't know if anyone has a dimension to measure and as you said, they could have been milled anyway. AFAIK, the different heads for the various sizes were the same thruout the years of production so YOM should not make any difference. There is an article explaining different head and compression ratio changes for the 327/288 and 356 engines but don't believe there ever was an option to swap heads on the 359 to have official factory info. Here is what they said about the other engines. I don't know if you can extrapolate the 356 info to get close enough to the 359 to be meaningful.
Attach file:
(225.02 KB)
(199.99 KB)
On the heads I don't know if anyone has a dimension to measure and as you said, they could have been milled anyway. AFAIK, the different heads for the various sizes were the same thruout the years of production so YOM should not make any difference. There is an article explaining different head and compression ratio changes for the 327/288 and 356 engines but don't believe there ever was an option to swap heads on the 359 to have official factory info. Here is what they said about the other engines. I don't know if you can extrapolate the 356 info to get close enough to the 359 to be meaningful.
Attach file:
(225.02 KB)
(199.99 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=181115