Re: reverse polarity
Another thing that people know that just ain't so.
NA Crossfire has 10:1 compression, SRT has 9:1. Should be easier to spin.
Wish mine had 9:1, then I could run 87 PON and save 10% on gas.
BTW the idea of a lower compression ratio with a boosted engine, is not what you would think. The point is to have a larger combustion chamber packed to the same chamber pressure at TDC. This makes more power from the same swept volume.
What I do not understand is why a small bore engine at 10:1 needs 91 PON. 89 would seem plenty particularly with dual ignition.
Anyone know if both plugs fire at the same time or are they staggered like a hemi ?