Packard Forum Index » Post-War (1946-54)

Hi there, I have a 288 marked head with an H on it. I have been searching here but can only find the threads about the HC and edmunds heads. Any info about this one? I was told it was higher compression slightly but I was wondering how much and any info about specs/tuning for getting it going.

Thanks!

I believe it raises the compression from about 7:1 to about 7.5:1. As far as I know, tune up specs are not changed. HP, torque, and efficiency are improved by 3 to 5%.

I believe TxGoat may be correct and the H designation was stamped for an easy way to identify the late to arrive 288 higher compression heads mentioned in the service article.

Seem to recall reading there was also a different head used in cars with Ultramatics that also raised the compression slightly for a bit more horsepower but don't remember by how much. Those might have been used more on the 327 and believe they had an AT designation stamped or cast. There is probably a service article on them somewhere.

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The 51-54 Specs manual lists 7.0 and 7.8 compression heads. Apologies if I'm off-base.

Interesting. I wasn’t looking for any increase but I certainly won’t turn it down. Just trying to identify exactly what I have here and how it compares with my current 49 22nd deluxe 288.

Attached are some snaps of the new engine, sorry the engine number is very hard to read so I’m trying to get another picture or make it out better.

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I was wondering about this again, so was the higher compression head covered in the service article (seems to be the one I have) an option you could elect for/purchase through a dealer, or recommended to be swapped in during a service at some point in 1950?