5.7 0r 6.1 with msd hemi 6 and carb
When I look at these timing tables the MAP readings look backwards in relation to the ignition timing , 105 KPA = 31 inHg , 10 KPA = 2.95 inHg . You need more timimg at light load (high manifold vaccum) , less timing at full load ( 0 to low manifold vaccum ) . Am I reading something the wrong way here?These are the factory MBT timing tables. These timing values represent the Mininmum timing advance that delivers the Best Torque.[MBT] These values also assume that the engine is NOT knock limited in any way ei: its using high octane fuel.
The PCM uses these values as a CAP or MAX to the final timing.
WOT timing for pump gas is usually a couple degrees lower.
Unless you're on a dyno measuring the HP gain/loss of timing adjustments while monitoring Knock, I'd NEVER go any higher than these values.
2005 5.7L
2007 6.1L
