Re: Thunderbolt engine
Posted by David Baird On 2008/9/9 17:49:32
Bob1951;
I believe the compression for your 51 would be the same as the 48-50, which was 7:1. With a 288 head it would have increased to 7.5:1.
The head that was on my 1948 Custom is for a 327, it says "Packard Thunderbolt" and was cast on 3-4-54. The head on my other 1948 Custom engine says "Packard" and was cast on 1-28-48. So, it would seem that somewhere between 1948 and 1954 Packard adopted the name Thunderbolt. If we keep checking casting dates we should be able narrow this down even more.
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=12776