I was wondering if anyone had done tests on this, then decided to do my own. I have a 4 banger, so changing gaps across the board is not time intensive at all.
I changed the gaps, and then checked the vacuum. Then I changed the gaps, and checked the vacuum again. Here's the data:
Code:
Gap (inches) Vacuum reading (In. Hg)
Test 1: .025 16
Test 2: .040 16.5
Test 3: .045 16.7
Test 4: .050 16.7
Test 5: .060 16.9
Test 6: .080 16.7
No, my gauge doesn't have decimals, but the needle moved so little between tests that I figured I should use decimals.
My question is how this relates to FE. Does higher vacuum mean higher efficiency?