Could My Heads Be Milled Or Something???

[PKRWUD]

Originally posted by Jeb_Bush_2000
That's, what, a low of 10:1 and a high of 11:1?

?????????????????

Anyway, what was the difference between wet and dry? There is no set answer for a stock 5.0. I've seen all kinds of readings. That's why they stopped listing a recommended number, and instead gave a range that was acceptable. Several things could affect your readings, too. On an engine with high miles, carbon build up often occurs, and that can both raise compression and encourage pinging.

You should run a test again, both wet and dry, and with all of the plugs removed during the test. Post the results.

Take care,
-Chris