Compression

[Nick in Fayetteville]

What is the compression ratio on the Model A "B" head. This is the police head. Some say 5.0 to 1, others tell me that it is 5.5 to 1. What's your thoughts. Thank you.

 

[Patrick L.]

I believe the standard 'A' is 4.2 and the 'B' or police head is 4.8.

If I'm wrong we'll know soon enough. [ smiley face]

 

[Doug Linden]

Model A "B" Police head has CR of 5.2

 

[Chuck Sea/Tac]

5.2 is correct. I’m guessing 65# most important is they’re within 5# or so of each other.

 

[Patrick L.]

http://www.fordgarage.com/pages/headcompressionratio.htm

 

[Nick in Fayetteville]

Thanks Guys, I researched more and found that 5.2 is correct. Thanks for your help. Have a happy "A" day.....Nick